Merge branch 'proto_field_ifdefs' into integration

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

.clang-tidy.hash

@@ -1 +1 @@
-a3cdfc378d28b53b416a1d5bf0ab9077ee18867f0d39436ea8013cf5a4ead87a
+07f621354fe1350ba51953c80273cd44a04aa44f15cc30bd7b8fe2a641427b7a

.coveragerc

@@ -1,4 +1,4 @@
 [run]
-omit = 
+omit =
     esphome/components/*
     tests/integration/*

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,92 @@
+name: Report an issue with ESPHome
+description: Report an issue with ESPHome.
+body:
+  - type: markdown
+    attributes:
+      value: |
+        This issue form is for reporting bugs only!
+
+        If you have a feature request or enhancement, please [request them here instead][fr].
+
+        [fr]: https://github.com/orgs/esphome/discussions
+  - type: textarea
+    validations:
+      required: true
+    id: problem
+    attributes:
+      label: The problem
+      description: >-
+        Describe the issue you are experiencing here to communicate to the
+        maintainers. Tell us what you were trying to do and what happened.
+
+        Provide a clear and concise description of what the problem is.
+
+  - type: markdown
+    attributes:
+      value: |
+        ## Environment
+  - type: input
+    id: version
+    validations:
+      required: true
+    attributes:
+      label: Which version of ESPHome has the issue?
+      description: >
+        ESPHome version like 1.19, 2025.6.0 or 2025.XX.X-dev.
+  - type: dropdown
+    validations:
+      required: true
+    id: installation
+    attributes:
+      label: What type of installation are you using?
+      options:
+        - Home Assistant Add-on
+        - Docker
+        - pip
+  - type: dropdown
+    validations:
+      required: true
+    id: platform
+    attributes:
+      label: What platform are you using?
+      options:
+        - ESP8266
+        - ESP32
+        - RP2040
+        - BK72XX
+        - RTL87XX
+        - LN882X
+        - Host
+        - Other
+  - type: input
+    id: component_name
+    attributes:
+      label: Component causing the issue
+      description: >
+        The name of the component or platform. For example, api/i2c or ultrasonic.
+
+  - type: markdown
+    attributes:
+      value: |
+        # Details
+  - type: textarea
+    id: config
+    attributes:
+      label: YAML Config
+      description: |
+        Include a complete YAML configuration file demonstrating the problem here. Preferably post the *entire* file - don't make assumptions about what is unimportant. However, if it's a large or complicated config then you will need to reduce it to the smallest possible file *that still demonstrates the problem*. If you don't provide enough information to *easily* reproduce the problem, it's unlikely your bug report will get any attention. Logs do not belong here, attach them below.
+      render: yaml
+  - type: textarea
+    id: logs
+    attributes:
+      label: Anything in the logs that might be useful for us?
+      description: For example, error message, or stack traces. Serial or USB logs are much more useful than WiFi logs.
+      render: txt
+  - type: textarea
+    id: additional
+    attributes:
+      label: Additional information
+      description: >
+        If you have any additional information for us, use the field below.
+        Please note, you can attach screenshots or screen recordings here, by
+        dragging and dropping files in the field below.

.github/ISSUE_TEMPLATE/config.yml

@@ -1,15 +1,21 @@
 ---
 blank_issues_enabled: false
 contact_links:
-  - name: Issue Tracker
-    url: https://github.com/esphome/issues
-    about: Please create bug reports in the dedicated issue tracker.
-  - name: Feature Request Tracker
-    url: https://github.com/esphome/feature-requests
-    about: |
-      Please create feature requests in the dedicated feature request tracker.
+  - name: Report an issue with the ESPHome documentation
+    url: https://github.com/esphome/esphome-docs/issues/new/choose
+    about: Report an issue with the ESPHome documentation.
+  - name: Report an issue with the ESPHome web server
+    url: https://github.com/esphome/esphome-webserver/issues/new/choose
+    about: Report an issue with the ESPHome web server.
+  - name: Report an issue with the ESPHome Builder / Dashboard
+    url: https://github.com/esphome/dashboard/issues/new/choose
+    about: Report an issue with the ESPHome Builder / Dashboard.
+  - name: Report an issue with the ESPHome API client
+    url: https://github.com/esphome/aioesphomeapi/issues/new/choose
+    about: Report an issue with the ESPHome API client.
+  - name: Make a Feature Request
+    url: https://github.com/orgs/esphome/discussions
+    about: Please create feature requests in the dedicated feature request tracker.
   - name: Frequently Asked Question
     url: https://esphome.io/guides/faq.html
-    about: |
-      Please view the FAQ for common questions and what
-      to include in a bug report.
+    about: Please view the FAQ for common questions and what to include in a bug report.

.github/workflows/ci-clang-tidy-hash.yml

@@ -73,4 +73,3 @@ jobs:
                 });
               }
             }
-

.github/workflows/ci-docker.yml

@@ -47,7 +47,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5.6.0
         with:
-          python-version: "3.10"
+          python-version: "3.11"
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3.11.1
 

.github/workflows/ci.yml

@@ -20,8 +20,8 @@ permissions:
   contents: read
 
 env:
-  DEFAULT_PYTHON: "3.10"
-  PYUPGRADE_TARGET: "--py310-plus"
+  DEFAULT_PYTHON: "3.11"
+  PYUPGRADE_TARGET: "--py311-plus"
 
 concurrency:
   # yamllint disable-line rule:line-length
@@ -39,7 +39,7 @@ jobs:
         uses: actions/checkout@v4.2.2
       - name: Generate cache-key
         id: cache-key
-        run: echo key="${{ hashFiles('requirements.txt', 'requirements_test.txt') }}" >> $GITHUB_OUTPUT
+        run: echo key="${{ hashFiles('requirements.txt', 'requirements_test.txt', '.pre-commit-config.yaml') }}" >> $GITHUB_OUTPUT
       - name: Set up Python ${{ env.DEFAULT_PYTHON }}
         id: python
         uses: actions/setup-python@v5.6.0
@@ -58,56 +58,16 @@ jobs:
           python -m venv venv
           . venv/bin/activate
           python --version
-          pip install -r requirements.txt -r requirements_test.txt
+          pip install -r requirements.txt -r requirements_test.txt pre-commit
           pip install -e .
 
-  ruff:
-    name: Check ruff
-    runs-on: ubuntu-24.04
-    needs:
-      - common
-    steps:
-      - name: Check out code from GitHub
-        uses: actions/checkout@v4.2.2
-      - name: Restore Python
-        uses: ./.github/actions/restore-python
-        with:
-          python-version: ${{ env.DEFAULT_PYTHON }}
-          cache-key: ${{ needs.common.outputs.cache-key }}
-      - name: Run Ruff
-        run: |
-          . venv/bin/activate
-          ruff format esphome tests
-      - name: Suggested changes
-        run: script/ci-suggest-changes
-        if: always()
-
-  flake8:
-    name: Check flake8
-    runs-on: ubuntu-24.04
-    needs:
-      - common
-    steps:
-      - name: Check out code from GitHub
-        uses: actions/checkout@v4.2.2
-      - name: Restore Python
-        uses: ./.github/actions/restore-python
-        with:
-          python-version: ${{ env.DEFAULT_PYTHON }}
-          cache-key: ${{ needs.common.outputs.cache-key }}
-      - name: Run flake8
-        run: |
-          . venv/bin/activate
-          flake8 esphome
-      - name: Suggested changes
-        run: script/ci-suggest-changes
-        if: always()
-
   pylint:
     name: Check pylint
     runs-on: ubuntu-24.04
     needs:
       - common
+      - determine-jobs
+    if: needs.determine-jobs.outputs.python-linters == 'true'
     steps:
       - name: Check out code from GitHub
         uses: actions/checkout@v4.2.2
@@ -124,27 +84,6 @@ jobs:
         run: script/ci-suggest-changes
         if: always()
 
-  pyupgrade:
-    name: Check pyupgrade
-    runs-on: ubuntu-24.04
-    needs:
-      - common
-    steps:
-      - name: Check out code from GitHub
-        uses: actions/checkout@v4.2.2
-      - name: Restore Python
-        uses: ./.github/actions/restore-python
-        with:
-          python-version: ${{ env.DEFAULT_PYTHON }}
-          cache-key: ${{ needs.common.outputs.cache-key }}
-      - name: Run pyupgrade
-        run: |
-          . venv/bin/activate
-          pyupgrade ${{ env.PYUPGRADE_TARGET }} `find esphome -name "*.py" -type f`
-      - name: Suggested changes
-        run: script/ci-suggest-changes
-        if: always()
-
   ci-custom:
     name: Run script/ci-custom
     runs-on: ubuntu-24.04
@@ -173,7 +112,6 @@ jobs:
       fail-fast: false
       matrix:
         python-version:
-          - "3.10"
           - "3.11"
           - "3.12"
           - "3.13"
@@ -189,14 +127,10 @@ jobs:
             os: windows-latest
           - python-version: "3.12"
             os: windows-latest
-          - python-version: "3.10"
-            os: windows-latest
           - python-version: "3.13"
             os: macOS-latest
           - python-version: "3.12"
             os: macOS-latest
-          - python-version: "3.10"
-            os: macOS-latest
     runs-on: ${{ matrix.os }}
     needs:
       - common
@@ -232,11 +166,52 @@ jobs:
           path: venv
           key: ${{ runner.os }}-${{ steps.restore-python.outputs.python-version }}-venv-${{ needs.common.outputs.cache-key }}
 
+  determine-jobs:
+    name: Determine which jobs to run
+    runs-on: ubuntu-24.04
+    needs:
+      - common
+    outputs:
+      integration-tests: ${{ steps.determine.outputs.integration-tests }}
+      clang-tidy: ${{ steps.determine.outputs.clang-tidy }}
+      python-linters: ${{ steps.determine.outputs.python-linters }}
+      changed-components: ${{ steps.determine.outputs.changed-components }}
+      component-test-count: ${{ steps.determine.outputs.component-test-count }}
+    steps:
+      - name: Check out code from GitHub
+        uses: actions/checkout@v4.2.2
+        with:
+          # Fetch enough history to find the merge base
+          fetch-depth: 2
+      - name: Restore Python
+        uses: ./.github/actions/restore-python
+        with:
+          python-version: ${{ env.DEFAULT_PYTHON }}
+          cache-key: ${{ needs.common.outputs.cache-key }}
+      - name: Determine which tests to run
+        id: determine
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          . venv/bin/activate
+          output=$(python script/determine-jobs.py)
+          echo "Test determination output:"
+          echo "$output" | jq
+
+          # Extract individual fields
+          echo "integration-tests=$(echo "$output" | jq -r '.integration_tests')" >> $GITHUB_OUTPUT
+          echo "clang-tidy=$(echo "$output" | jq -r '.clang_tidy')" >> $GITHUB_OUTPUT
+          echo "python-linters=$(echo "$output" | jq -r '.python_linters')" >> $GITHUB_OUTPUT
+          echo "changed-components=$(echo "$output" | jq -c '.changed_components')" >> $GITHUB_OUTPUT
+          echo "component-test-count=$(echo "$output" | jq -r '.component_test_count')" >> $GITHUB_OUTPUT
+
   integration-tests:
     name: Run integration tests
     runs-on: ubuntu-latest
     needs:
       - common
+      - determine-jobs
+    if: needs.determine-jobs.outputs.integration-tests == 'true'
     steps:
       - name: Check out code from GitHub
         uses: actions/checkout@v4.2.2
@@ -266,44 +241,13 @@ jobs:
           . venv/bin/activate
           pytest -vv --no-cov --tb=native -n auto tests/integration/
 
-  clang-format:
-    name: Check clang-format
-    runs-on: ubuntu-24.04
-    needs:
-      - common
-    steps:
-      - name: Check out code from GitHub
-        uses: actions/checkout@v4.2.2
-      - name: Restore Python
-        uses: ./.github/actions/restore-python
-        with:
-          python-version: ${{ env.DEFAULT_PYTHON }}
-          cache-key: ${{ needs.common.outputs.cache-key }}
-      - name: Install clang-format
-        run: |
-          . venv/bin/activate
-          pip install clang-format -c requirements_dev.txt
-      - name: Run clang-format
-        run: |
-          . venv/bin/activate
-          script/clang-format -i
-          git diff-index --quiet HEAD --
-      - name: Suggested changes
-        run: script/ci-suggest-changes
-        if: always()
-
   clang-tidy:
     name: ${{ matrix.name }}
     runs-on: ubuntu-24.04
     needs:
       - common
-      - ruff
-      - ci-custom
-      - clang-format
-      - flake8
-      - pylint
-      - pytest
-      - pyupgrade
+      - determine-jobs
+    if: needs.determine-jobs.outputs.clang-tidy == 'true'
     env:
       GH_TOKEN: ${{ github.token }}
     strategy:
@@ -411,50 +355,18 @@ jobs:
         # yamllint disable-line rule:line-length
         if: always()
 
-  list-components:
-    runs-on: ubuntu-24.04
-    needs:
-      - common
-    if: github.event_name == 'pull_request'
-    env:
-      GH_TOKEN: ${{ github.token }}
-    outputs:
-      components: ${{ steps.list-components.outputs.components }}
-      count: ${{ steps.list-components.outputs.count }}
-    steps:
-      - name: Check out code from GitHub
-        uses: actions/checkout@v4.2.2
-      - name: Restore Python
-        uses: ./.github/actions/restore-python
-        with:
-          python-version: ${{ env.DEFAULT_PYTHON }}
-          cache-key: ${{ needs.common.outputs.cache-key }}
-      - name: Find changed components
-        id: list-components
-        run: |
-          . venv/bin/activate
-          components=$(script/list-components.py --changed)
-          output_components=$(echo "$components" | jq -R -s -c 'split("\n")[:-1] | map(select(length > 0))')
-          count=$(echo "$output_components" | jq length)
-
-          echo "components=$output_components" >> $GITHUB_OUTPUT
-          echo "count=$count" >> $GITHUB_OUTPUT
-
-          echo "$count Components:"
-          echo "$output_components" | jq
-
   test-build-components:
     name: Component test ${{ matrix.file }}
     runs-on: ubuntu-24.04
     needs:
       - common
-      - list-components
-    if: github.event_name == 'pull_request' && fromJSON(needs.list-components.outputs.count) > 0 && fromJSON(needs.list-components.outputs.count) < 100
+      - determine-jobs
+    if: github.event_name == 'pull_request' && fromJSON(needs.determine-jobs.outputs.component-test-count) > 0 && fromJSON(needs.determine-jobs.outputs.component-test-count) < 100
     strategy:
       fail-fast: false
       max-parallel: 2
       matrix:
-        file: ${{ fromJson(needs.list-components.outputs.components) }}
+        file: ${{ fromJson(needs.determine-jobs.outputs.changed-components) }}
     steps:
       - name: Install dependencies
         run: |
@@ -482,8 +394,8 @@ jobs:
     runs-on: ubuntu-24.04
     needs:
       - common
-      - list-components
-    if: github.event_name == 'pull_request' && fromJSON(needs.list-components.outputs.count) >= 100
+      - determine-jobs
+    if: github.event_name == 'pull_request' && fromJSON(needs.determine-jobs.outputs.component-test-count) >= 100
     outputs:
       matrix: ${{ steps.split.outputs.components }}
     steps:
@@ -492,7 +404,7 @@ jobs:
       - name: Split components into 20 groups
         id: split
         run: |
-          components=$(echo '${{ needs.list-components.outputs.components }}' | jq -c '.[]' | shuf | jq -s -c '[_nwise(20) | join(" ")]')
+          components=$(echo '${{ needs.determine-jobs.outputs.changed-components }}' | jq -c '.[]' | shuf | jq -s -c '[_nwise(20) | join(" ")]')
           echo "components=$components" >> $GITHUB_OUTPUT
 
   test-build-components-split:
@@ -500,9 +412,9 @@ jobs:
     runs-on: ubuntu-24.04
     needs:
       - common
-      - list-components
+      - determine-jobs
       - test-build-components-splitter
-    if: github.event_name == 'pull_request' && fromJSON(needs.list-components.outputs.count) >= 100
+    if: github.event_name == 'pull_request' && fromJSON(needs.determine-jobs.outputs.component-test-count) >= 100
     strategy:
       fail-fast: false
       max-parallel: 4
@@ -539,24 +451,41 @@ jobs:
             ./script/test_build_components -e compile -c $component
           done
 
+  pre-commit-ci-lite:
+    name: pre-commit.ci lite
+    runs-on: ubuntu-latest
+    needs:
+      - common
+    if: github.event_name == 'pull_request' && github.base_ref != 'beta' && github.base_ref != 'release'
+    steps:
+      - name: Check out code from GitHub
+        uses: actions/checkout@v4.2.2
+      - name: Restore Python
+        uses: ./.github/actions/restore-python
+        with:
+          python-version: ${{ env.DEFAULT_PYTHON }}
+          cache-key: ${{ needs.common.outputs.cache-key }}
+      - uses: pre-commit/action@v3.0.1
+        env:
+          SKIP: pylint,clang-tidy-hash
+      - uses: pre-commit-ci/lite-action@v1.1.0
+        if: always()
+
   ci-status:
     name: CI Status
     runs-on: ubuntu-24.04
     needs:
       - common
-      - ruff
       - ci-custom
-      - clang-format
-      - flake8
       - pylint
       - pytest
       - integration-tests
-      - pyupgrade
       - clang-tidy
-      - list-components
+      - determine-jobs
       - test-build-components
       - test-build-components-splitter
       - test-build-components-split
+      - pre-commit-ci-lite
     if: always()
     steps:
       - name: Success

.github/workflows/release.yml

@@ -96,7 +96,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5.6.0
         with:
-          python-version: "3.10"
+          python-version: "3.11"
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3.11.1

.github/workflows/yaml-lint.yml

@@ -1,25 +0,0 @@
----
-name: YAML lint
-
-on:
-  push:
-    branches: [dev, beta, release]
-    paths:
-      - "**.yaml"
-      - "**.yml"
-  pull_request:
-    paths:
-      - "**.yaml"
-      - "**.yml"
-
-jobs:
-  yamllint:
-    name: yamllint
-    runs-on: ubuntu-latest
-    steps:
-      - name: Check out code from GitHub
-        uses: actions/checkout@v4.2.2
-      - name: Run yamllint
-        uses: frenck/action-yamllint@v1.5.0
-        with:
-          strict: true

.pre-commit-config.yaml

@@ -1,10 +1,17 @@
 ---
 # See https://pre-commit.com for more information
 # See https://pre-commit.com/hooks.html for more hooks
+
+ci:
+  autoupdate_commit_msg: 'pre-commit: autoupdate'
+  autoupdate_schedule: off  # Disabled until ruff versions are synced between deps and pre-commit
+  # Skip hooks that have issues in pre-commit CI environment
+  skip: [pylint, clang-tidy-hash]
+
 repos:
   - repo: https://github.com/astral-sh/ruff-pre-commit
     # Ruff version.
-    rev: v0.12.2
+    rev: v0.12.3
     hooks:
       # Run the linter.
       - id: ruff
@@ -20,22 +27,25 @@ repos:
           - pydocstyle==5.1.1
         files: ^(esphome|tests)/.+\.py$
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v3.4.0
+    rev: v5.0.0
     hooks:
       - id: no-commit-to-branch
         args:
           - --branch=dev
           - --branch=release
           - --branch=beta
+      - id: end-of-file-fixer
+      - id: trailing-whitespace
   - repo: https://github.com/asottile/pyupgrade
     rev: v3.20.0
     hooks:
       - id: pyupgrade
-        args: [--py310-plus]
+        args: [--py311-plus]
   - repo: https://github.com/adrienverge/yamllint.git
     rev: v1.37.1
     hooks:
       - id: yamllint
+        exclude: ^(\.clang-format|\.clang-tidy)$
   - repo: https://github.com/pre-commit/mirrors-clang-format
     rev: v13.0.1
     hooks:

CODEOWNERS

@@ -324,6 +324,7 @@ esphome/components/nextion/text_sensor/* @senexcrenshaw
 esphome/components/nfc/* @jesserockz @kbx81
 esphome/components/noblex/* @AGalfra
 esphome/components/npi19/* @bakerkj
+esphome/components/nrf52/* @tomaszduda23
 esphome/components/number/* @esphome/core
 esphome/components/one_wire/* @ssieb
 esphome/components/online_image/* @clydebarrow @guillempages
@@ -378,6 +379,7 @@ esphome/components/rp2040_pwm/* @jesserockz
 esphome/components/rpi_dpi_rgb/* @clydebarrow
 esphome/components/rtl87xx/* @kuba2k2
 esphome/components/rtttl/* @glmnet
+esphome/components/runtime_stats/* @bdraco
 esphome/components/safe_mode/* @jsuanet @kbx81 @paulmonigatti
 esphome/components/scd4x/* @martgras @sjtrny
 esphome/components/script/* @esphome/core
@@ -535,5 +537,6 @@ esphome/components/xiaomi_xmwsdj04mmc/* @medusalix
 esphome/components/xl9535/* @mreditor97
 esphome/components/xpt2046/touchscreen/* @nielsnl68 @numo68
 esphome/components/xxtea/* @clydebarrow
+esphome/components/zephyr/* @tomaszduda23
 esphome/components/zhlt01/* @cfeenstra1024
 esphome/components/zio_ultrasonic/* @kahrendt

esphome/__main__.py

@@ -458,13 +458,6 @@ def command_vscode(args):
 
 
 def command_compile(args, config):
-    # Set memory analysis options in config
-    if args.analyze_memory:
-        config.setdefault(CONF_ESPHOME, {})["analyze_memory"] = True
-
-    if args.memory_report:
-        config.setdefault(CONF_ESPHOME, {})["memory_report_file"] = args.memory_report
-
     exit_code = write_cpp(config)
     if exit_code != 0:
         return exit_code
@@ -844,17 +837,6 @@ def parse_args(argv):
         help="Only generate source code, do not compile.",
         action="store_true",
     )
-    parser_compile.add_argument(
-        "--analyze-memory",
-        help="Analyze and display memory usage by component after compilation.",
-        action="store_true",
-    )
-    parser_compile.add_argument(
-        "--memory-report",
-        help="Save memory analysis report to a file (supports .json or .txt).",
-        type=str,
-        metavar="FILE",
-    )
 
     parser_upload = subparsers.add_parser(
         "upload",

esphome/components/adc/__init__.py

@@ -51,82 +51,83 @@ SAMPLING_MODES = {
     "max": sampling_mode.MAX,
 }
 
-adc1_channel_t = cg.global_ns.enum("adc1_channel_t")
-adc2_channel_t = cg.global_ns.enum("adc2_channel_t")
+adc_unit_t = cg.global_ns.enum("adc_unit_t", is_class=True)
+
+adc_channel_t = cg.global_ns.enum("adc_channel_t", is_class=True)
 
 # pin to adc1 channel mapping
 # https://github.com/espressif/esp-idf/blob/v4.4.8/components/driver/include/driver/adc.h
 ESP32_VARIANT_ADC1_PIN_TO_CHANNEL = {
     # https://github.com/espressif/esp-idf/blob/master/components/soc/esp32/include/soc/adc_channel.h
     VARIANT_ESP32: {
-        36: adc1_channel_t.ADC1_CHANNEL_0,
-        37: adc1_channel_t.ADC1_CHANNEL_1,
-        38: adc1_channel_t.ADC1_CHANNEL_2,
-        39: adc1_channel_t.ADC1_CHANNEL_3,
-        32: adc1_channel_t.ADC1_CHANNEL_4,
-        33: adc1_channel_t.ADC1_CHANNEL_5,
-        34: adc1_channel_t.ADC1_CHANNEL_6,
-        35: adc1_channel_t.ADC1_CHANNEL_7,
+        36: adc_channel_t.ADC_CHANNEL_0,
+        37: adc_channel_t.ADC_CHANNEL_1,
+        38: adc_channel_t.ADC_CHANNEL_2,
+        39: adc_channel_t.ADC_CHANNEL_3,
+        32: adc_channel_t.ADC_CHANNEL_4,
+        33: adc_channel_t.ADC_CHANNEL_5,
+        34: adc_channel_t.ADC_CHANNEL_6,
+        35: adc_channel_t.ADC_CHANNEL_7,
     },
     # https://github.com/espressif/esp-idf/blob/master/components/soc/esp32c2/include/soc/adc_channel.h
     VARIANT_ESP32C2: {
-        0: adc1_channel_t.ADC1_CHANNEL_0,
-        1: adc1_channel_t.ADC1_CHANNEL_1,
-        2: adc1_channel_t.ADC1_CHANNEL_2,
-        3: adc1_channel_t.ADC1_CHANNEL_3,
-        4: adc1_channel_t.ADC1_CHANNEL_4,
+        0: adc_channel_t.ADC_CHANNEL_0,
+        1: adc_channel_t.ADC_CHANNEL_1,
+        2: adc_channel_t.ADC_CHANNEL_2,
+        3: adc_channel_t.ADC_CHANNEL_3,
+        4: adc_channel_t.ADC_CHANNEL_4,
     },
     # https://github.com/espressif/esp-idf/blob/master/components/soc/esp32c3/include/soc/adc_channel.h
     VARIANT_ESP32C3: {
-        0: adc1_channel_t.ADC1_CHANNEL_0,
-        1: adc1_channel_t.ADC1_CHANNEL_1,
-        2: adc1_channel_t.ADC1_CHANNEL_2,
-        3: adc1_channel_t.ADC1_CHANNEL_3,
-        4: adc1_channel_t.ADC1_CHANNEL_4,
+        0: adc_channel_t.ADC_CHANNEL_0,
+        1: adc_channel_t.ADC_CHANNEL_1,
+        2: adc_channel_t.ADC_CHANNEL_2,
+        3: adc_channel_t.ADC_CHANNEL_3,
+        4: adc_channel_t.ADC_CHANNEL_4,
     },
     # https://github.com/espressif/esp-idf/blob/master/components/soc/esp32c6/include/soc/adc_channel.h
     VARIANT_ESP32C6: {
-        0: adc1_channel_t.ADC1_CHANNEL_0,
-        1: adc1_channel_t.ADC1_CHANNEL_1,
-        2: adc1_channel_t.ADC1_CHANNEL_2,
-        3: adc1_channel_t.ADC1_CHANNEL_3,
-        4: adc1_channel_t.ADC1_CHANNEL_4,
-        5: adc1_channel_t.ADC1_CHANNEL_5,
-        6: adc1_channel_t.ADC1_CHANNEL_6,
+        0: adc_channel_t.ADC_CHANNEL_0,
+        1: adc_channel_t.ADC_CHANNEL_1,
+        2: adc_channel_t.ADC_CHANNEL_2,
+        3: adc_channel_t.ADC_CHANNEL_3,
+        4: adc_channel_t.ADC_CHANNEL_4,
+        5: adc_channel_t.ADC_CHANNEL_5,
+        6: adc_channel_t.ADC_CHANNEL_6,
     },
     # https://github.com/espressif/esp-idf/blob/master/components/soc/esp32h2/include/soc/adc_channel.h
     VARIANT_ESP32H2: {
-        1: adc1_channel_t.ADC1_CHANNEL_0,
-        2: adc1_channel_t.ADC1_CHANNEL_1,
-        3: adc1_channel_t.ADC1_CHANNEL_2,
-        4: adc1_channel_t.ADC1_CHANNEL_3,
-        5: adc1_channel_t.ADC1_CHANNEL_4,
+        1: adc_channel_t.ADC_CHANNEL_0,
+        2: adc_channel_t.ADC_CHANNEL_1,
+        3: adc_channel_t.ADC_CHANNEL_2,
+        4: adc_channel_t.ADC_CHANNEL_3,
+        5: adc_channel_t.ADC_CHANNEL_4,
     },
     # https://github.com/espressif/esp-idf/blob/master/components/soc/esp32s2/include/soc/adc_channel.h
     VARIANT_ESP32S2: {
-        1: adc1_channel_t.ADC1_CHANNEL_0,
-        2: adc1_channel_t.ADC1_CHANNEL_1,
-        3: adc1_channel_t.ADC1_CHANNEL_2,
-        4: adc1_channel_t.ADC1_CHANNEL_3,
-        5: adc1_channel_t.ADC1_CHANNEL_4,
-        6: adc1_channel_t.ADC1_CHANNEL_5,
-        7: adc1_channel_t.ADC1_CHANNEL_6,
-        8: adc1_channel_t.ADC1_CHANNEL_7,
-        9: adc1_channel_t.ADC1_CHANNEL_8,
-        10: adc1_channel_t.ADC1_CHANNEL_9,
+        1: adc_channel_t.ADC_CHANNEL_0,
+        2: adc_channel_t.ADC_CHANNEL_1,
+        3: adc_channel_t.ADC_CHANNEL_2,
+        4: adc_channel_t.ADC_CHANNEL_3,
+        5: adc_channel_t.ADC_CHANNEL_4,
+        6: adc_channel_t.ADC_CHANNEL_5,
+        7: adc_channel_t.ADC_CHANNEL_6,
+        8: adc_channel_t.ADC_CHANNEL_7,
+        9: adc_channel_t.ADC_CHANNEL_8,
+        10: adc_channel_t.ADC_CHANNEL_9,
     },
     # https://github.com/espressif/esp-idf/blob/master/components/soc/esp32s3/include/soc/adc_channel.h
     VARIANT_ESP32S3: {
-        1: adc1_channel_t.ADC1_CHANNEL_0,
-        2: adc1_channel_t.ADC1_CHANNEL_1,
-        3: adc1_channel_t.ADC1_CHANNEL_2,
-        4: adc1_channel_t.ADC1_CHANNEL_3,
-        5: adc1_channel_t.ADC1_CHANNEL_4,
-        6: adc1_channel_t.ADC1_CHANNEL_5,
-        7: adc1_channel_t.ADC1_CHANNEL_6,
-        8: adc1_channel_t.ADC1_CHANNEL_7,
-        9: adc1_channel_t.ADC1_CHANNEL_8,
-        10: adc1_channel_t.ADC1_CHANNEL_9,
+        1: adc_channel_t.ADC_CHANNEL_0,
+        2: adc_channel_t.ADC_CHANNEL_1,
+        3: adc_channel_t.ADC_CHANNEL_2,
+        4: adc_channel_t.ADC_CHANNEL_3,
+        5: adc_channel_t.ADC_CHANNEL_4,
+        6: adc_channel_t.ADC_CHANNEL_5,
+        7: adc_channel_t.ADC_CHANNEL_6,
+        8: adc_channel_t.ADC_CHANNEL_7,
+        9: adc_channel_t.ADC_CHANNEL_8,
+        10: adc_channel_t.ADC_CHANNEL_9,
     },
 }
 
@@ -135,24 +136,24 @@ ESP32_VARIANT_ADC1_PIN_TO_CHANNEL = {
 ESP32_VARIANT_ADC2_PIN_TO_CHANNEL = {
     # https://github.com/espressif/esp-idf/blob/master/components/soc/esp32/include/soc/adc_channel.h
     VARIANT_ESP32: {
-        4: adc2_channel_t.ADC2_CHANNEL_0,
-        0: adc2_channel_t.ADC2_CHANNEL_1,
-        2: adc2_channel_t.ADC2_CHANNEL_2,
-        15: adc2_channel_t.ADC2_CHANNEL_3,
-        13: adc2_channel_t.ADC2_CHANNEL_4,
-        12: adc2_channel_t.ADC2_CHANNEL_5,
-        14: adc2_channel_t.ADC2_CHANNEL_6,
-        27: adc2_channel_t.ADC2_CHANNEL_7,
-        25: adc2_channel_t.ADC2_CHANNEL_8,
-        26: adc2_channel_t.ADC2_CHANNEL_9,
+        4: adc_channel_t.ADC_CHANNEL_0,
+        0: adc_channel_t.ADC_CHANNEL_1,
+        2: adc_channel_t.ADC_CHANNEL_2,
+        15: adc_channel_t.ADC_CHANNEL_3,
+        13: adc_channel_t.ADC_CHANNEL_4,
+        12: adc_channel_t.ADC_CHANNEL_5,
+        14: adc_channel_t.ADC_CHANNEL_6,
+        27: adc_channel_t.ADC_CHANNEL_7,
+        25: adc_channel_t.ADC_CHANNEL_8,
+        26: adc_channel_t.ADC_CHANNEL_9,
     },
     # https://github.com/espressif/esp-idf/blob/master/components/soc/esp32c2/include/soc/adc_channel.h
     VARIANT_ESP32C2: {
-        5: adc2_channel_t.ADC2_CHANNEL_0,
+        5: adc_channel_t.ADC_CHANNEL_0,
     },
     # https://github.com/espressif/esp-idf/blob/master/components/soc/esp32c3/include/soc/adc_channel.h
     VARIANT_ESP32C3: {
-        5: adc2_channel_t.ADC2_CHANNEL_0,
+        5: adc_channel_t.ADC_CHANNEL_0,
     },
     # https://github.com/espressif/esp-idf/blob/master/components/soc/esp32c6/include/soc/adc_channel.h
     VARIANT_ESP32C6: {},  # no ADC2
@@ -160,29 +161,29 @@ ESP32_VARIANT_ADC2_PIN_TO_CHANNEL = {
     VARIANT_ESP32H2: {},  # no ADC2
     # https://github.com/espressif/esp-idf/blob/master/components/soc/esp32s2/include/soc/adc_channel.h
     VARIANT_ESP32S2: {
-        11: adc2_channel_t.ADC2_CHANNEL_0,
-        12: adc2_channel_t.ADC2_CHANNEL_1,
-        13: adc2_channel_t.ADC2_CHANNEL_2,
-        14: adc2_channel_t.ADC2_CHANNEL_3,
-        15: adc2_channel_t.ADC2_CHANNEL_4,
-        16: adc2_channel_t.ADC2_CHANNEL_5,
-        17: adc2_channel_t.ADC2_CHANNEL_6,
-        18: adc2_channel_t.ADC2_CHANNEL_7,
-        19: adc2_channel_t.ADC2_CHANNEL_8,
-        20: adc2_channel_t.ADC2_CHANNEL_9,
+        11: adc_channel_t.ADC_CHANNEL_0,
+        12: adc_channel_t.ADC_CHANNEL_1,
+        13: adc_channel_t.ADC_CHANNEL_2,
+        14: adc_channel_t.ADC_CHANNEL_3,
+        15: adc_channel_t.ADC_CHANNEL_4,
+        16: adc_channel_t.ADC_CHANNEL_5,
+        17: adc_channel_t.ADC_CHANNEL_6,
+        18: adc_channel_t.ADC_CHANNEL_7,
+        19: adc_channel_t.ADC_CHANNEL_8,
+        20: adc_channel_t.ADC_CHANNEL_9,
     },
     # https://github.com/espressif/esp-idf/blob/master/components/soc/esp32s3/include/soc/adc_channel.h
     VARIANT_ESP32S3: {
-        11: adc2_channel_t.ADC2_CHANNEL_0,
-        12: adc2_channel_t.ADC2_CHANNEL_1,
-        13: adc2_channel_t.ADC2_CHANNEL_2,
-        14: adc2_channel_t.ADC2_CHANNEL_3,
-        15: adc2_channel_t.ADC2_CHANNEL_4,
-        16: adc2_channel_t.ADC2_CHANNEL_5,
-        17: adc2_channel_t.ADC2_CHANNEL_6,
-        18: adc2_channel_t.ADC2_CHANNEL_7,
-        19: adc2_channel_t.ADC2_CHANNEL_8,
-        20: adc2_channel_t.ADC2_CHANNEL_9,
+        11: adc_channel_t.ADC_CHANNEL_0,
+        12: adc_channel_t.ADC_CHANNEL_1,
+        13: adc_channel_t.ADC_CHANNEL_2,
+        14: adc_channel_t.ADC_CHANNEL_3,
+        15: adc_channel_t.ADC_CHANNEL_4,
+        16: adc_channel_t.ADC_CHANNEL_5,
+        17: adc_channel_t.ADC_CHANNEL_6,
+        18: adc_channel_t.ADC_CHANNEL_7,
+        19: adc_channel_t.ADC_CHANNEL_8,
+        20: adc_channel_t.ADC_CHANNEL_9,
     },
 }
 

esphome/components/adc/adc_sensor.h

@@ -3,12 +3,15 @@
 #include "esphome/components/sensor/sensor.h"
 #include "esphome/components/voltage_sampler/voltage_sampler.h"
 #include "esphome/core/component.h"
+#include "esphome/core/defines.h"
 #include "esphome/core/hal.h"
 
 #ifdef USE_ESP32
-#include <esp_adc_cal.h>
-#include "driver/adc.h"
-#endif  // USE_ESP32
+#include "esp_adc/adc_cali.h"
+#include "esp_adc/adc_cali_scheme.h"
+#include "esp_adc/adc_oneshot.h"
+#include "hal/adc_types.h"  // This defines ADC_CHANNEL_MAX
+#endif                      // USE_ESP32
 
 namespace esphome {
 namespace adc {
@@ -49,36 +52,71 @@ class Aggregator {
 
 class ADCSensor : public sensor::Sensor, public PollingComponent, public voltage_sampler::VoltageSampler {
  public:
-#ifdef USE_ESP32
-  /// Set the attenuation for this pin. Only available on the ESP32.
-  void set_attenuation(adc_atten_t attenuation) { this->attenuation_ = attenuation; }
-  void set_channel1(adc1_channel_t channel) {
-    this->channel1_ = channel;
-    this->channel2_ = ADC2_CHANNEL_MAX;
-  }
-  void set_channel2(adc2_channel_t channel) {
-    this->channel2_ = channel;
-    this->channel1_ = ADC1_CHANNEL_MAX;
-  }
-  void set_autorange(bool autorange) { this->autorange_ = autorange; }
-#endif  // USE_ESP32
-
-  /// Update ADC values
+  /// Update the sensor's state by reading the current ADC value.
+  /// This method is called periodically based on the update interval.
   void update() override;
-  /// Setup ADC
+
+  /// Set up the ADC sensor by initializing hardware and calibration parameters.
+  /// This method is called once during device initialization.
   void setup() override;
+
+  /// Output the configuration details of the ADC sensor for debugging purposes.
+  /// This method is called during the ESPHome setup process to log the configuration.
   void dump_config() override;
-  /// `HARDWARE_LATE` setup priority
+
+  /// Return the setup priority for this component.
+  /// Components with higher priority are initialized earlier during setup.
+  /// @return A float representing the setup priority.
   float get_setup_priority() const override;
+
+  /// Set the GPIO pin to be used by the ADC sensor.
+  /// @param pin Pointer to an InternalGPIOPin representing the ADC input pin.
   void set_pin(InternalGPIOPin *pin) { this->pin_ = pin; }
+
+  /// Enable or disable the output of raw ADC values (unprocessed data).
+  /// @param output_raw Boolean indicating whether to output raw ADC values (true) or processed values (false).
   void set_output_raw(bool output_raw) { this->output_raw_ = output_raw; }
+
+  /// Set the number of samples to be taken for ADC readings to improve accuracy.
+  /// A higher sample count reduces noise but increases the reading time.
+  /// @param sample_count The number of samples (e.g., 1, 4, 8).
   void set_sample_count(uint8_t sample_count);
+
+  /// Set the sampling mode for how multiple ADC samples are combined into a single measurement.
+  ///
+  /// When multiple samples are taken (controlled by set_sample_count), they can be combined
+  /// in one of three ways:
+  ///   - SamplingMode::AVG: Compute the average (default)
+  ///   - SamplingMode::MIN: Use the lowest sample value
+  ///   - SamplingMode::MAX: Use the highest sample value
+  /// @param sampling_mode The desired sampling mode to use for aggregating ADC samples.
   void set_sampling_mode(SamplingMode sampling_mode);
+
+  /// Perform a single ADC sampling operation and return the measured value.
+  /// This function handles raw readings, calibration, and averaging as needed.
+  /// @return The sampled value as a float.
   float sample() override;
 
-#ifdef USE_ESP8266
-  std::string unique_id() override;
-#endif  // USE_ESP8266
+#ifdef USE_ESP32
+  /// Set the ADC attenuation level to adjust the input voltage range.
+  /// This determines how the ADC interprets input voltages, allowing for greater precision
+  /// or the ability to measure higher voltages depending on the chosen attenuation level.
+  /// @param attenuation The desired ADC attenuation level (e.g., ADC_ATTEN_DB_0, ADC_ATTEN_DB_11).
+  void set_attenuation(adc_atten_t attenuation) { this->attenuation_ = attenuation; }
+
+  /// Configure the ADC to use a specific channel on ADC1.
+  /// This sets the channel for single-shot or continuous ADC measurements.
+  /// @param channel The ADC1 channel to configure, such as ADC_CHANNEL_0, ADC_CHANNEL_3, etc.
+  void set_channel(adc_unit_t unit, adc_channel_t channel) {
+    this->adc_unit_ = unit;
+    this->channel_ = channel;
+  }
+
+  /// Set whether autoranging should be enabled for the ADC.
+  /// Autoranging automatically adjusts the attenuation level to handle a wide range of input voltages.
+  /// @param autorange Boolean indicating whether to enable autoranging.
+  void set_autorange(bool autorange) { this->autorange_ = autorange; }
+#endif  // USE_ESP32
 
 #ifdef USE_RP2040
   void set_is_temperature() { this->is_temperature_ = true; }
@@ -90,17 +128,28 @@ class ADCSensor : public sensor::Sensor, public PollingComponent, public voltage
   InternalGPIOPin *pin_;
   SamplingMode sampling_mode_{SamplingMode::AVG};
 
+#ifdef USE_ESP32
+  float sample_autorange_();
+  float sample_fixed_attenuation_();
+  bool autorange_{false};
+  adc_oneshot_unit_handle_t adc_handle_{nullptr};
+  adc_cali_handle_t calibration_handle_{nullptr};
+  adc_atten_t attenuation_{ADC_ATTEN_DB_0};
+  adc_channel_t channel_;
+  adc_unit_t adc_unit_;
+  struct SetupFlags {
+    uint8_t init_complete : 1;
+    uint8_t config_complete : 1;
+    uint8_t handle_init_complete : 1;
+    uint8_t calibration_complete : 1;
+    uint8_t reserved : 4;
+  } setup_flags_{};
+  static adc_oneshot_unit_handle_t shared_adc_handles[2];
+#endif  // USE_ESP32
+
 #ifdef USE_RP2040
   bool is_temperature_{false};
 #endif  // USE_RP2040
-
-#ifdef USE_ESP32
-  adc_atten_t attenuation_{ADC_ATTEN_DB_0};
-  adc1_channel_t channel1_{ADC1_CHANNEL_MAX};
-  adc2_channel_t channel2_{ADC2_CHANNEL_MAX};
-  bool autorange_{false};
-  esp_adc_cal_characteristics_t cal_characteristics_[SOC_ADC_ATTEN_NUM] = {};
-#endif  // USE_ESP32
 };
 
 }  // namespace adc

esphome/components/adc/adc_sensor_esp32.cpp

@@ -8,145 +8,308 @@ namespace adc {
 
 static const char *const TAG = "adc.esp32";
 
-static const adc_bits_width_t ADC_WIDTH_MAX_SOC_BITS = static_cast<adc_bits_width_t>(ADC_WIDTH_MAX - 1);
+adc_oneshot_unit_handle_t ADCSensor::shared_adc_handles[2] = {nullptr, nullptr};
 
-#ifndef SOC_ADC_RTC_MAX_BITWIDTH
-#if USE_ESP32_VARIANT_ESP32S2
-static const int32_t SOC_ADC_RTC_MAX_BITWIDTH = 13;
-#else
-static const int32_t SOC_ADC_RTC_MAX_BITWIDTH = 12;
-#endif  // USE_ESP32_VARIANT_ESP32S2
-#endif  // SOC_ADC_RTC_MAX_BITWIDTH
-
-static const int ADC_MAX = (1 << SOC_ADC_RTC_MAX_BITWIDTH) - 1;
-static const int ADC_HALF = (1 << SOC_ADC_RTC_MAX_BITWIDTH) >> 1;
-
-void ADCSensor::setup() {
-  ESP_LOGCONFIG(TAG, "Running setup for '%s'", this->get_name().c_str());
-
-  if (this->channel1_ != ADC1_CHANNEL_MAX) {
-    adc1_config_width(ADC_WIDTH_MAX_SOC_BITS);
-    if (!this->autorange_) {
-      adc1_config_channel_atten(this->channel1_, this->attenuation_);
-    }
-  } else if (this->channel2_ != ADC2_CHANNEL_MAX) {
-    if (!this->autorange_) {
-      adc2_config_channel_atten(this->channel2_, this->attenuation_);
-    }
-  }
-
-  for (int32_t i = 0; i <= ADC_ATTEN_DB_12_COMPAT; i++) {
-    auto adc_unit = this->channel1_ != ADC1_CHANNEL_MAX ? ADC_UNIT_1 : ADC_UNIT_2;
-    auto cal_value = esp_adc_cal_characterize(adc_unit, (adc_atten_t) i, ADC_WIDTH_MAX_SOC_BITS,
-                                              1100,  // default vref
-                                              &this->cal_characteristics_[i]);
-    switch (cal_value) {
-      case ESP_ADC_CAL_VAL_EFUSE_VREF:
-        ESP_LOGV(TAG, "Using eFuse Vref for calibration");
-        break;
-      case ESP_ADC_CAL_VAL_EFUSE_TP:
-        ESP_LOGV(TAG, "Using two-point eFuse Vref for calibration");
-        break;
-      case ESP_ADC_CAL_VAL_DEFAULT_VREF:
-      default:
-        break;
-    }
+const LogString *attenuation_to_str(adc_atten_t attenuation) {
+  switch (attenuation) {
+    case ADC_ATTEN_DB_0:
+      return LOG_STR("0 dB");
+    case ADC_ATTEN_DB_2_5:
+      return LOG_STR("2.5 dB");
+    case ADC_ATTEN_DB_6:
+      return LOG_STR("6 dB");
+    case ADC_ATTEN_DB_12_COMPAT:
+      return LOG_STR("12 dB");
+    default:
+      return LOG_STR("Unknown Attenuation");
   }
 }
 
-void ADCSensor::dump_config() {
-  static const char *const ATTEN_AUTO_STR = "auto";
-  static const char *const ATTEN_0DB_STR = "0 db";
-  static const char *const ATTEN_2_5DB_STR = "2.5 db";
-  static const char *const ATTEN_6DB_STR = "6 db";
-  static const char *const ATTEN_12DB_STR = "12 db";
-  const char *atten_str = ATTEN_AUTO_STR;
+const LogString *adc_unit_to_str(adc_unit_t unit) {
+  switch (unit) {
+    case ADC_UNIT_1:
+      return LOG_STR("ADC1");
+    case ADC_UNIT_2:
+      return LOG_STR("ADC2");
+    default:
+      return LOG_STR("Unknown ADC Unit");
+  }
+}
 
-  LOG_SENSOR("", "ADC Sensor", this);
-  LOG_PIN("  Pin: ", this->pin_);
-
-  if (!this->autorange_) {
-    switch (this->attenuation_) {
-      case ADC_ATTEN_DB_0:
-        atten_str = ATTEN_0DB_STR;
-        break;
-      case ADC_ATTEN_DB_2_5:
-        atten_str = ATTEN_2_5DB_STR;
-        break;
-      case ADC_ATTEN_DB_6:
-        atten_str = ATTEN_6DB_STR;
-        break;
-      case ADC_ATTEN_DB_12_COMPAT:
-        atten_str = ATTEN_12DB_STR;
-        break;
-      default:  // This is to satisfy the unused ADC_ATTEN_MAX
-        break;
+void ADCSensor::setup() {
+  ESP_LOGCONFIG(TAG, "Running setup for '%s'", this->get_name().c_str());
+  // Check if another sensor already initialized this ADC unit
+  if (ADCSensor::shared_adc_handles[this->adc_unit_] == nullptr) {
+    adc_oneshot_unit_init_cfg_t init_config = {};  // Zero initialize
+    init_config.unit_id = this->adc_unit_;
+    init_config.ulp_mode = ADC_ULP_MODE_DISABLE;
+#if USE_ESP32_VARIANT_ESP32C3 || USE_ESP32_VARIANT_ESP32C6 || USE_ESP32_VARIANT_ESP32H2
+    init_config.clk_src = ADC_DIGI_CLK_SRC_DEFAULT;
+#endif  // USE_ESP32_VARIANT_ESP32C3 || USE_ESP32_VARIANT_ESP32C6 || USE_ESP32_VARIANT_ESP32H2
+    esp_err_t err = adc_oneshot_new_unit(&init_config, &ADCSensor::shared_adc_handles[this->adc_unit_]);
+    if (err != ESP_OK) {
+      ESP_LOGE(TAG, "Error initializing %s: %d", LOG_STR_ARG(adc_unit_to_str(this->adc_unit_)), err);
+      this->mark_failed();
+      return;
     }
   }
+  this->adc_handle_ = ADCSensor::shared_adc_handles[this->adc_unit_];
 
+  this->setup_flags_.handle_init_complete = true;
+
+  adc_oneshot_chan_cfg_t config = {
+      .atten = this->attenuation_,
+      .bitwidth = ADC_BITWIDTH_DEFAULT,
+  };
+  esp_err_t err = adc_oneshot_config_channel(this->adc_handle_, this->channel_, &config);
+  if (err != ESP_OK) {
+    ESP_LOGE(TAG, "Error configuring channel: %d", err);
+    this->mark_failed();
+    return;
+  }
+  this->setup_flags_.config_complete = true;
+
+  // Initialize ADC calibration
+  if (this->calibration_handle_ == nullptr) {
+    adc_cali_handle_t handle = nullptr;
+    esp_err_t err;
+
+#if USE_ESP32_VARIANT_ESP32C3 || USE_ESP32_VARIANT_ESP32C6 || USE_ESP32_VARIANT_ESP32S3 || USE_ESP32_VARIANT_ESP32H2
+    // RISC-V variants and S3 use curve fitting calibration
+    adc_cali_curve_fitting_config_t cali_config = {};  // Zero initialize first
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 3, 0)
+    cali_config.chan = this->channel_;
+#endif  // ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 3, 0)
+    cali_config.unit_id = this->adc_unit_;
+    cali_config.atten = this->attenuation_;
+    cali_config.bitwidth = ADC_BITWIDTH_DEFAULT;
+
+    err = adc_cali_create_scheme_curve_fitting(&cali_config, &handle);
+    if (err == ESP_OK) {
+      this->calibration_handle_ = handle;
+      this->setup_flags_.calibration_complete = true;
+      ESP_LOGV(TAG, "Using curve fitting calibration");
+    } else {
+      ESP_LOGW(TAG, "Curve fitting calibration failed with error %d, will use uncalibrated readings", err);
+      this->setup_flags_.calibration_complete = false;
+    }
+#else  // Other ESP32 variants use line fitting calibration
+    adc_cali_line_fitting_config_t cali_config = {
+      .unit_id = this->adc_unit_,
+      .atten = this->attenuation_,
+      .bitwidth = ADC_BITWIDTH_DEFAULT,
+#if !defined(USE_ESP32_VARIANT_ESP32S2)
+      .default_vref = 1100,  // Default reference voltage in mV
+#endif  // !defined(USE_ESP32_VARIANT_ESP32S2)
+    };
+    err = adc_cali_create_scheme_line_fitting(&cali_config, &handle);
+    if (err == ESP_OK) {
+      this->calibration_handle_ = handle;
+      this->setup_flags_.calibration_complete = true;
+      ESP_LOGV(TAG, "Using line fitting calibration");
+    } else {
+      ESP_LOGW(TAG, "Line fitting calibration failed with error %d, will use uncalibrated readings", err);
+      this->setup_flags_.calibration_complete = false;
+    }
+#endif  // USE_ESP32_VARIANT_ESP32C3 || ESP32C6 || ESP32S3 || ESP32H2
+  }
+
+  this->setup_flags_.init_complete = true;
+}
+
+void ADCSensor::dump_config() {
+  LOG_SENSOR("", "ADC Sensor", this);
+  LOG_PIN("  Pin: ", this->pin_);
   ESP_LOGCONFIG(TAG,
-                "  Attenuation: %s\n"
-                "  Samples: %i\n"
+                "  Channel:       %d\n"
+                "  Unit:          %s\n"
+                "  Attenuation:   %s\n"
+                "  Samples:       %i\n"
                 "  Sampling mode: %s",
-                atten_str, this->sample_count_, LOG_STR_ARG(sampling_mode_to_str(this->sampling_mode_)));
+                this->channel_, LOG_STR_ARG(adc_unit_to_str(this->adc_unit_)),
+                this->autorange_ ? "Auto" : LOG_STR_ARG(attenuation_to_str(this->attenuation_)), this->sample_count_,
+                LOG_STR_ARG(sampling_mode_to_str(this->sampling_mode_)));
+
+  ESP_LOGCONFIG(
+      TAG,
+      "  Setup Status:\n"
+      "    Handle Init:  %s\n"
+      "    Config:       %s\n"
+      "    Calibration:  %s\n"
+      "    Overall Init: %s",
+      this->setup_flags_.handle_init_complete ? "OK" : "FAILED", this->setup_flags_.config_complete ? "OK" : "FAILED",
+      this->setup_flags_.calibration_complete ? "OK" : "FAILED", this->setup_flags_.init_complete ? "OK" : "FAILED");
+
   LOG_UPDATE_INTERVAL(this);
 }
 
 float ADCSensor::sample() {
-  if (!this->autorange_) {
-    auto aggr = Aggregator(this->sampling_mode_);
+  if (this->autorange_) {
+    return this->sample_autorange_();
+  } else {
+    return this->sample_fixed_attenuation_();
+  }
+}
 
-    for (uint8_t sample = 0; sample < this->sample_count_; sample++) {
-      int raw = -1;
-      if (this->channel1_ != ADC1_CHANNEL_MAX) {
-        raw = adc1_get_raw(this->channel1_);
-      } else if (this->channel2_ != ADC2_CHANNEL_MAX) {
-        adc2_get_raw(this->channel2_, ADC_WIDTH_MAX_SOC_BITS, &raw);
-      }
-      if (raw == -1) {
-        return NAN;
-      }
+float ADCSensor::sample_fixed_attenuation_() {
+  auto aggr = Aggregator(this->sampling_mode_);
 
-      aggr.add_sample(raw);
+  for (uint8_t sample = 0; sample < this->sample_count_; sample++) {
+    int raw;
+    esp_err_t err = adc_oneshot_read(this->adc_handle_, this->channel_, &raw);
+
+    if (err != ESP_OK) {
+      ESP_LOGW(TAG, "ADC read failed with error %d", err);
+      continue;
     }
-    if (this->output_raw_) {
-      return aggr.aggregate();
+
+    if (raw == -1) {
+      ESP_LOGW(TAG, "Invalid ADC reading");
+      continue;
     }
-    uint32_t mv =
-        esp_adc_cal_raw_to_voltage(aggr.aggregate(), &this->cal_characteristics_[(int32_t) this->attenuation_]);
-    return mv / 1000.0f;
+
+    aggr.add_sample(raw);
   }
 
-  int raw12 = ADC_MAX, raw6 = ADC_MAX, raw2 = ADC_MAX, raw0 = ADC_MAX;
+  uint32_t final_value = aggr.aggregate();
 
-  if (this->channel1_ != ADC1_CHANNEL_MAX) {
-    adc1_config_channel_atten(this->channel1_, ADC_ATTEN_DB_12_COMPAT);
-    raw12 = adc1_get_raw(this->channel1_);
-    if (raw12 < ADC_MAX) {
-      adc1_config_channel_atten(this->channel1_, ADC_ATTEN_DB_6);
-      raw6 = adc1_get_raw(this->channel1_);
-      if (raw6 < ADC_MAX) {
-        adc1_config_channel_atten(this->channel1_, ADC_ATTEN_DB_2_5);
-        raw2 = adc1_get_raw(this->channel1_);
-        if (raw2 < ADC_MAX) {
-          adc1_config_channel_atten(this->channel1_, ADC_ATTEN_DB_0);
-          raw0 = adc1_get_raw(this->channel1_);
-        }
+  if (this->output_raw_) {
+    return final_value;
+  }
+
+  if (this->calibration_handle_ != nullptr) {
+    int voltage_mv;
+    esp_err_t err = adc_cali_raw_to_voltage(this->calibration_handle_, final_value, &voltage_mv);
+    if (err == ESP_OK) {
+      return voltage_mv / 1000.0f;
+    } else {
+      ESP_LOGW(TAG, "ADC calibration conversion failed with error %d, disabling calibration", err);
+      if (this->calibration_handle_ != nullptr) {
+#if USE_ESP32_VARIANT_ESP32C3 || USE_ESP32_VARIANT_ESP32C6 || USE_ESP32_VARIANT_ESP32S3 || USE_ESP32_VARIANT_ESP32H2
+        adc_cali_delete_scheme_curve_fitting(this->calibration_handle_);
+#else   // Other ESP32 variants use line fitting calibration
+        adc_cali_delete_scheme_line_fitting(this->calibration_handle_);
+#endif  // USE_ESP32_VARIANT_ESP32C3 || ESP32C6 || ESP32S3 || ESP32H2
+        this->calibration_handle_ = nullptr;
       }
     }
-  } else if (this->channel2_ != ADC2_CHANNEL_MAX) {
-    adc2_config_channel_atten(this->channel2_, ADC_ATTEN_DB_12_COMPAT);
-    adc2_get_raw(this->channel2_, ADC_WIDTH_MAX_SOC_BITS, &raw12);
-    if (raw12 < ADC_MAX) {
-      adc2_config_channel_atten(this->channel2_, ADC_ATTEN_DB_6);
-      adc2_get_raw(this->channel2_, ADC_WIDTH_MAX_SOC_BITS, &raw6);
-      if (raw6 < ADC_MAX) {
-        adc2_config_channel_atten(this->channel2_, ADC_ATTEN_DB_2_5);
-        adc2_get_raw(this->channel2_, ADC_WIDTH_MAX_SOC_BITS, &raw2);
-        if (raw2 < ADC_MAX) {
-          adc2_config_channel_atten(this->channel2_, ADC_ATTEN_DB_0);
-          adc2_get_raw(this->channel2_, ADC_WIDTH_MAX_SOC_BITS, &raw0);
-        }
+  }
+
+  return final_value * 3.3f / 4095.0f;
+}
+
+float ADCSensor::sample_autorange_() {
+  // Auto-range mode
+  auto read_atten = [this](adc_atten_t atten) -> std::pair<int, float> {
+    // First reconfigure the attenuation for this reading
+    adc_oneshot_chan_cfg_t config = {
+        .atten = atten,
+        .bitwidth = ADC_BITWIDTH_DEFAULT,
+    };
+
+    esp_err_t err = adc_oneshot_config_channel(this->adc_handle_, this->channel_, &config);
+
+    if (err != ESP_OK) {
+      ESP_LOGW(TAG, "Error configuring ADC channel for autorange: %d", err);
+      return {-1, 0.0f};
+    }
+
+    // Need to recalibrate for the new attenuation
+    if (this->calibration_handle_ != nullptr) {
+      // Delete old calibration handle
+#if USE_ESP32_VARIANT_ESP32C3 || USE_ESP32_VARIANT_ESP32C6 || USE_ESP32_VARIANT_ESP32S3 || USE_ESP32_VARIANT_ESP32H2
+      adc_cali_delete_scheme_curve_fitting(this->calibration_handle_);
+#else
+      adc_cali_delete_scheme_line_fitting(this->calibration_handle_);
+#endif
+      this->calibration_handle_ = nullptr;
+    }
+
+    // Create new calibration handle for this attenuation
+    adc_cali_handle_t handle = nullptr;
+
+#if USE_ESP32_VARIANT_ESP32C3 || USE_ESP32_VARIANT_ESP32C6 || USE_ESP32_VARIANT_ESP32S3 || USE_ESP32_VARIANT_ESP32H2
+    adc_cali_curve_fitting_config_t cali_config = {};
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 3, 0)
+    cali_config.chan = this->channel_;
+#endif
+    cali_config.unit_id = this->adc_unit_;
+    cali_config.atten = atten;
+    cali_config.bitwidth = ADC_BITWIDTH_DEFAULT;
+
+    err = adc_cali_create_scheme_curve_fitting(&cali_config, &handle);
+#else
+    adc_cali_line_fitting_config_t cali_config = {
+      .unit_id = this->adc_unit_,
+      .atten = atten,
+      .bitwidth = ADC_BITWIDTH_DEFAULT,
+#if !defined(USE_ESP32_VARIANT_ESP32S2)
+      .default_vref = 1100,
+#endif
+    };
+    err = adc_cali_create_scheme_line_fitting(&cali_config, &handle);
+#endif
+
+    int raw;
+    err = adc_oneshot_read(this->adc_handle_, this->channel_, &raw);
+
+    if (err != ESP_OK) {
+      ESP_LOGW(TAG, "ADC read failed in autorange with error %d", err);
+      if (handle != nullptr) {
+#if USE_ESP32_VARIANT_ESP32C3 || USE_ESP32_VARIANT_ESP32C6 || USE_ESP32_VARIANT_ESP32S3 || USE_ESP32_VARIANT_ESP32H2
+        adc_cali_delete_scheme_curve_fitting(handle);
+#else
+        adc_cali_delete_scheme_line_fitting(handle);
+#endif
+      }
+      return {-1, 0.0f};
+    }
+
+    float voltage = 0.0f;
+    if (handle != nullptr) {
+      int voltage_mv;
+      err = adc_cali_raw_to_voltage(handle, raw, &voltage_mv);
+      if (err == ESP_OK) {
+        voltage = voltage_mv / 1000.0f;
+      } else {
+        voltage = raw * 3.3f / 4095.0f;
+      }
+      // Clean up calibration handle
+#if USE_ESP32_VARIANT_ESP32C3 || USE_ESP32_VARIANT_ESP32C6 || USE_ESP32_VARIANT_ESP32S3 || USE_ESP32_VARIANT_ESP32H2
+      adc_cali_delete_scheme_curve_fitting(handle);
+#else
+      adc_cali_delete_scheme_line_fitting(handle);
+#endif
+    } else {
+      voltage = raw * 3.3f / 4095.0f;
+    }
+
+    return {raw, voltage};
+  };
+
+  auto [raw12, mv12] = read_atten(ADC_ATTEN_DB_12);
+  if (raw12 == -1) {
+    ESP_LOGE(TAG, "Failed to read ADC in autorange mode");
+    return NAN;
+  }
+
+  int raw6 = 4095, raw2 = 4095, raw0 = 4095;
+  float mv6 = 0, mv2 = 0, mv0 = 0;
+
+  if (raw12 < 4095) {
+    auto [raw6_val, mv6_val] = read_atten(ADC_ATTEN_DB_6);
+    raw6 = raw6_val;
+    mv6 = mv6_val;
+
+    if (raw6 < 4095 && raw6 != -1) {
+      auto [raw2_val, mv2_val] = read_atten(ADC_ATTEN_DB_2_5);
+      raw2 = raw2_val;
+      mv2 = mv2_val;
+
+      if (raw2 < 4095 && raw2 != -1) {
+        auto [raw0_val, mv0_val] = read_atten(ADC_ATTEN_DB_0);
+        raw0 = raw0_val;
+        mv0 = mv0_val;
       }
     }
   }
@@ -155,19 +318,19 @@ float ADCSensor::sample() {
     return NAN;
   }
 
-  uint32_t mv12 = esp_adc_cal_raw_to_voltage(raw12, &this->cal_characteristics_[(int32_t) ADC_ATTEN_DB_12_COMPAT]);
-  uint32_t mv6 = esp_adc_cal_raw_to_voltage(raw6, &this->cal_characteristics_[(int32_t) ADC_ATTEN_DB_6]);
-  uint32_t mv2 = esp_adc_cal_raw_to_voltage(raw2, &this->cal_characteristics_[(int32_t) ADC_ATTEN_DB_2_5]);
-  uint32_t mv0 = esp_adc_cal_raw_to_voltage(raw0, &this->cal_characteristics_[(int32_t) ADC_ATTEN_DB_0]);
-
-  uint32_t c12 = std::min(raw12, ADC_HALF);
-  uint32_t c6 = ADC_HALF - std::abs(raw6 - ADC_HALF);
-  uint32_t c2 = ADC_HALF - std::abs(raw2 - ADC_HALF);
-  uint32_t c0 = std::min(ADC_MAX - raw0, ADC_HALF);
+  const int adc_half = 2048;
+  uint32_t c12 = std::min(raw12, adc_half);
+  uint32_t c6 = adc_half - std::abs(raw6 - adc_half);
+  uint32_t c2 = adc_half - std::abs(raw2 - adc_half);
+  uint32_t c0 = std::min(4095 - raw0, adc_half);
   uint32_t csum = c12 + c6 + c2 + c0;
 
-  uint32_t mv_scaled = (mv12 * c12) + (mv6 * c6) + (mv2 * c2) + (mv0 * c0);
-  return mv_scaled / (float) (csum * 1000U);
+  if (csum == 0) {
+    ESP_LOGE(TAG, "Invalid weight sum in autorange calculation");
+    return NAN;
+  }
+
+  return (mv12 * c12 + mv6 * c6 + mv2 * c2 + mv0 * c0) / csum;
 }
 
 }  // namespace adc

esphome/components/adc/adc_sensor_esp8266.cpp

@@ -56,8 +56,6 @@ float ADCSensor::sample() {
   return aggr.aggregate() / 1024.0f;
 }
 
-std::string ADCSensor::unique_id() { return get_mac_address() + "-adc"; }
-
 }  // namespace adc
 }  // namespace esphome
 

esphome/components/adc/sensor.py

@@ -10,13 +10,11 @@ from esphome.const import (
     CONF_NUMBER,
     CONF_PIN,
     CONF_RAW,
-    CONF_WIFI,
     DEVICE_CLASS_VOLTAGE,
     STATE_CLASS_MEASUREMENT,
     UNIT_VOLT,
 )
 from esphome.core import CORE
-import esphome.final_validate as fv
 
 from . import (
     ATTENUATION_MODES,
@@ -24,6 +22,7 @@ from . import (
     ESP32_VARIANT_ADC2_PIN_TO_CHANNEL,
     SAMPLING_MODES,
     adc_ns,
+    adc_unit_t,
     validate_adc_pin,
 )
 
@@ -57,21 +56,6 @@ def validate_config(config):
     return config
 
 
-def final_validate_config(config):
-    if CORE.is_esp32:
-        variant = get_esp32_variant()
-        if (
-            CONF_WIFI in fv.full_config.get()
-            and config[CONF_PIN][CONF_NUMBER]
-            in ESP32_VARIANT_ADC2_PIN_TO_CHANNEL[variant]
-        ):
-            raise cv.Invalid(
-                f"{variant} doesn't support ADC on this pin when Wi-Fi is configured"
-            )
-
-    return config
-
-
 ADCSensor = adc_ns.class_(
     "ADCSensor", sensor.Sensor, cg.PollingComponent, voltage_sampler.VoltageSampler
 )
@@ -99,8 +83,6 @@ CONFIG_SCHEMA = cv.All(
     validate_config,
 )
 
-FINAL_VALIDATE_SCHEMA = final_validate_config
-
 
 async def to_code(config):
     var = cg.new_Pvariable(config[CONF_ID])
@@ -119,13 +101,13 @@ async def to_code(config):
     cg.add(var.set_sample_count(config[CONF_SAMPLES]))
     cg.add(var.set_sampling_mode(config[CONF_SAMPLING_MODE]))
 
-    if attenuation := config.get(CONF_ATTENUATION):
-        if attenuation == "auto":
-            cg.add(var.set_autorange(cg.global_ns.true))
-        else:
-            cg.add(var.set_attenuation(attenuation))
-
     if CORE.is_esp32:
+        if attenuation := config.get(CONF_ATTENUATION):
+            if attenuation == "auto":
+                cg.add(var.set_autorange(cg.global_ns.true))
+            else:
+                cg.add(var.set_attenuation(attenuation))
+
         variant = get_esp32_variant()
         pin_num = config[CONF_PIN][CONF_NUMBER]
         if (
@@ -133,10 +115,10 @@ async def to_code(config):
             and pin_num in ESP32_VARIANT_ADC1_PIN_TO_CHANNEL[variant]
         ):
             chan = ESP32_VARIANT_ADC1_PIN_TO_CHANNEL[variant][pin_num]
-            cg.add(var.set_channel1(chan))
+            cg.add(var.set_channel(adc_unit_t.ADC_UNIT_1, chan))
         elif (
             variant in ESP32_VARIANT_ADC2_PIN_TO_CHANNEL
             and pin_num in ESP32_VARIANT_ADC2_PIN_TO_CHANNEL[variant]
         ):
             chan = ESP32_VARIANT_ADC2_PIN_TO_CHANNEL[variant][pin_num]
-            cg.add(var.set_channel2(chan))
+            cg.add(var.set_channel(adc_unit_t.ADC_UNIT_2, chan))

esphome/components/api/__init__.py

@@ -24,8 +24,9 @@ from esphome.const import (
     CONF_TRIGGER_ID,
     CONF_VARIABLES,
 )
-from esphome.core import coroutine_with_priority
+from esphome.core import CORE, coroutine_with_priority
 
+DOMAIN = "api"
 DEPENDENCIES = ["network"]
 AUTO_LOAD = ["socket"]
 CODEOWNERS = ["@OttoWinter"]
@@ -51,6 +52,7 @@ SERVICE_ARG_NATIVE_TYPES = {
 }
 CONF_ENCRYPTION = "encryption"
 CONF_BATCH_DELAY = "batch_delay"
+CONF_CUSTOM_SERVICES = "custom_services"
 
 
 def validate_encryption_key(value):
@@ -115,6 +117,7 @@ CONFIG_SCHEMA = cv.All(
                 cv.positive_time_period_milliseconds,
                 cv.Range(max=cv.TimePeriod(milliseconds=65535)),
             ),
+            cv.Optional(CONF_CUSTOM_SERVICES, default=False): cv.boolean,
             cv.Optional(CONF_ON_CLIENT_CONNECTED): automation.validate_automation(
                 single=True
             ),
@@ -139,8 +142,11 @@ async def to_code(config):
     cg.add(var.set_reboot_timeout(config[CONF_REBOOT_TIMEOUT]))
     cg.add(var.set_batch_delay(config[CONF_BATCH_DELAY]))
 
+    # Set USE_API_SERVICES if any services are enabled
+    if config.get(CONF_ACTIONS) or config[CONF_CUSTOM_SERVICES]:
+        cg.add_define("USE_API_SERVICES")
+
     if actions := config.get(CONF_ACTIONS, []):
-        cg.add_define("USE_API_YAML_SERVICES")
         for conf in actions:
             template_args = []
             func_args = []
@@ -317,7 +323,10 @@ async def api_connected_to_code(config, condition_id, template_arg, args):
 
 
 def FILTER_SOURCE_FILES() -> list[str]:
-    """Filter out api_pb2_dump.cpp when proto message dumping is not enabled."""
+    """Filter out api_pb2_dump.cpp when proto message dumping is not enabled
+    and user_services.cpp when no services are defined."""
+    files_to_filter = []
+
     # api_pb2_dump.cpp is only needed when HAS_PROTO_MESSAGE_DUMP is defined
     # This is a particularly large file that still needs to be opened and read
     # all the way to the end even when ifdef'd out
@@ -325,6 +334,11 @@ def FILTER_SOURCE_FILES() -> list[str]:
     # HAS_PROTO_MESSAGE_DUMP is defined when ESPHOME_LOG_HAS_VERY_VERBOSE is set,
     # which happens when the logger level is VERY_VERBOSE
     if get_logger_level() != "VERY_VERBOSE":
-        return ["api_pb2_dump.cpp"]
+        files_to_filter.append("api_pb2_dump.cpp")
 
-    return []
+    # user_services.cpp is only needed when services are defined
+    config = CORE.config.get(DOMAIN, {})
+    if config and not config.get(CONF_ACTIONS) and not config[CONF_CUSTOM_SERVICES]:
+        files_to_filter.append("user_services.cpp")
+
+    return files_to_filter

esphome/components/api/api.proto

@@ -222,37 +222,37 @@ message DeviceInfoResponse {
   // The model of the board. For example NodeMCU
   string model = 6;
 
-  bool has_deep_sleep = 7;
+  bool has_deep_sleep = 7 [(field_ifdef) = "USE_DEEP_SLEEP"];
 
   // The esphome project details if set
-  string project_name = 8;
-  string project_version = 9;
+  string project_name = 8 [(field_ifdef) = "ESPHOME_PROJECT_NAME"];
+  string project_version = 9 [(field_ifdef) = "ESPHOME_PROJECT_NAME"];
 
-  uint32 webserver_port = 10;
+  uint32 webserver_port = 10 [(field_ifdef) = "USE_WEBSERVER"];
 
-  uint32 legacy_bluetooth_proxy_version = 11;
-  uint32 bluetooth_proxy_feature_flags = 15;
+  uint32 legacy_bluetooth_proxy_version = 11 [(field_ifdef) = "USE_BLUETOOTH_PROXY"];
+  uint32 bluetooth_proxy_feature_flags = 15 [(field_ifdef) = "USE_BLUETOOTH_PROXY"];
 
   string manufacturer = 12;
 
   string friendly_name = 13;
 
-  uint32 legacy_voice_assistant_version = 14;
-  uint32 voice_assistant_feature_flags = 17;
+  uint32 legacy_voice_assistant_version = 14 [(field_ifdef) = "USE_VOICE_ASSISTANT"];
+  uint32 voice_assistant_feature_flags = 17 [(field_ifdef) = "USE_VOICE_ASSISTANT"];
 
-  string suggested_area = 16;
+  string suggested_area = 16 [(field_ifdef) = "USE_AREAS"];
 
   // The Bluetooth mac address of the device. For example "AC:BC:32:89:0E:AA"
-  string bluetooth_mac_address = 18;
+  string bluetooth_mac_address = 18 [(field_ifdef) = "USE_BLUETOOTH_PROXY"];
 
   // Supports receiving and saving api encryption key
-  bool api_encryption_supported = 19;
+  bool api_encryption_supported = 19 [(field_ifdef) = "USE_API_NOISE"];
 
-  repeated DeviceInfo devices = 20;
-  repeated AreaInfo areas = 21;
+  repeated DeviceInfo devices = 20 [(field_ifdef) = "USE_DEVICES"];
+  repeated AreaInfo areas = 21 [(field_ifdef) = "USE_AREAS"];
 
   // Top-level area info to phase out suggested_area
-  AreaInfo area = 22;
+  AreaInfo area = 22 [(field_ifdef) = "USE_AREAS"];
 }
 
 message ListEntitiesRequest {
@@ -290,14 +290,14 @@ message ListEntitiesBinarySensorResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
 
   string device_class = 5;
   bool is_status_binary_sensor = 6;
   bool disabled_by_default = 7;
-  string icon = 8;
+  string icon = 8 [(field_ifdef) = "USE_ENTITY_ICON"];
   EntityCategory entity_category = 9;
-  uint32 device_id = 10;
+  uint32 device_id = 10 [(field_ifdef) = "USE_DEVICES"];
 }
 message BinarySensorStateResponse {
   option (id) = 21;
@@ -311,7 +311,7 @@ message BinarySensorStateResponse {
   // If the binary sensor does not have a valid state yet.
   // Equivalent to `!obj->has_state()` - inverse logic to make state packets smaller
   bool missing_state = 3;
-  uint32 device_id = 4;
+  uint32 device_id = 4 [(field_ifdef) = "USE_DEVICES"];
 }
 
 // ==================== COVER ====================
@@ -324,17 +324,17 @@ message ListEntitiesCoverResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
 
   bool assumed_state = 5;
   bool supports_position = 6;
   bool supports_tilt = 7;
   string device_class = 8;
   bool disabled_by_default = 9;
-  string icon = 10;
+  string icon = 10 [(field_ifdef) = "USE_ENTITY_ICON"];
   EntityCategory entity_category = 11;
   bool supports_stop = 12;
-  uint32 device_id = 13;
+  uint32 device_id = 13 [(field_ifdef) = "USE_DEVICES"];
 }
 
 enum LegacyCoverState {
@@ -361,7 +361,7 @@ message CoverStateResponse {
   float position = 3;
   float tilt = 4;
   CoverOperation current_operation = 5;
-  uint32 device_id = 6;
+  uint32 device_id = 6 [(field_ifdef) = "USE_DEVICES"];
 }
 
 enum LegacyCoverCommand {
@@ -374,6 +374,7 @@ message CoverCommandRequest {
   option (source) = SOURCE_CLIENT;
   option (ifdef) = "USE_COVER";
   option (no_delay) = true;
+  option (base_class) = "CommandProtoMessage";
 
   fixed32 key = 1;
 
@@ -387,6 +388,7 @@ message CoverCommandRequest {
   bool has_tilt = 6;
   float tilt = 7;
   bool stop = 8;
+  uint32 device_id = 9 [(field_ifdef) = "USE_DEVICES"];
 }
 
 // ==================== FAN ====================
@@ -399,17 +401,17 @@ message ListEntitiesFanResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
 
   bool supports_oscillation = 5;
   bool supports_speed = 6;
   bool supports_direction = 7;
   int32 supported_speed_count = 8;
   bool disabled_by_default = 9;
-  string icon = 10;
+  string icon = 10 [(field_ifdef) = "USE_ENTITY_ICON"];
   EntityCategory entity_category = 11;
   repeated string supported_preset_modes = 12;
-  uint32 device_id = 13;
+  uint32 device_id = 13 [(field_ifdef) = "USE_DEVICES"];
 }
 enum FanSpeed {
   FAN_SPEED_LOW = 0;
@@ -434,13 +436,14 @@ message FanStateResponse {
   FanDirection direction = 5;
   int32 speed_level = 6;
   string preset_mode = 7;
-  uint32 device_id = 8;
+  uint32 device_id = 8 [(field_ifdef) = "USE_DEVICES"];
 }
 message FanCommandRequest {
   option (id) = 31;
   option (source) = SOURCE_CLIENT;
   option (ifdef) = "USE_FAN";
   option (no_delay) = true;
+  option (base_class) = "CommandProtoMessage";
 
   fixed32 key = 1;
   bool has_state = 2;
@@ -455,6 +458,7 @@ message FanCommandRequest {
   int32 speed_level = 11;
   bool has_preset_mode = 12;
   string preset_mode = 13;
+  uint32 device_id = 14 [(field_ifdef) = "USE_DEVICES"];
 }
 
 // ==================== LIGHT ====================
@@ -480,7 +484,7 @@ message ListEntitiesLightResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
 
   repeated ColorMode supported_color_modes = 12;
   // next four supports_* are for legacy clients, newer clients should use color modes
@@ -492,9 +496,9 @@ message ListEntitiesLightResponse {
   float max_mireds = 10;
   repeated string effects = 11;
   bool disabled_by_default = 13;
-  string icon = 14;
+  string icon = 14 [(field_ifdef) = "USE_ENTITY_ICON"];
   EntityCategory entity_category = 15;
-  uint32 device_id = 16;
+  uint32 device_id = 16 [(field_ifdef) = "USE_DEVICES"];
 }
 message LightStateResponse {
   option (id) = 24;
@@ -516,13 +520,14 @@ message LightStateResponse {
   float cold_white = 12;
   float warm_white = 13;
   string effect = 9;
-  uint32 device_id = 14;
+  uint32 device_id = 14 [(field_ifdef) = "USE_DEVICES"];
 }
 message LightCommandRequest {
   option (id) = 32;
   option (source) = SOURCE_CLIENT;
   option (ifdef) = "USE_LIGHT";
   option (no_delay) = true;
+  option (base_class) = "CommandProtoMessage";
 
   fixed32 key = 1;
   bool has_state = 2;
@@ -551,6 +556,7 @@ message LightCommandRequest {
   uint32 flash_length = 17;
   bool has_effect = 18;
   string effect = 19;
+  uint32 device_id = 28 [(field_ifdef) = "USE_DEVICES"];
 }
 
 // ==================== SENSOR ====================
@@ -576,9 +582,9 @@ message ListEntitiesSensorResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
 
-  string icon = 5;
+  string icon = 5 [(field_ifdef) = "USE_ENTITY_ICON"];
   string unit_of_measurement = 6;
   int32 accuracy_decimals = 7;
   bool force_update = 8;
@@ -588,7 +594,7 @@ message ListEntitiesSensorResponse {
   SensorLastResetType legacy_last_reset_type = 11;
   bool disabled_by_default = 12;
   EntityCategory entity_category = 13;
-  uint32 device_id = 14;
+  uint32 device_id = 14 [(field_ifdef) = "USE_DEVICES"];
 }
 message SensorStateResponse {
   option (id) = 25;
@@ -602,7 +608,7 @@ message SensorStateResponse {
   // If the sensor does not have a valid state yet.
   // Equivalent to `!obj->has_state()` - inverse logic to make state packets smaller
   bool missing_state = 3;
-  uint32 device_id = 4;
+  uint32 device_id = 4 [(field_ifdef) = "USE_DEVICES"];
 }
 
 // ==================== SWITCH ====================
@@ -615,14 +621,14 @@ message ListEntitiesSwitchResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
 
-  string icon = 5;
+  string icon = 5 [(field_ifdef) = "USE_ENTITY_ICON"];
   bool assumed_state = 6;
   bool disabled_by_default = 7;
   EntityCategory entity_category = 8;
   string device_class = 9;
-  uint32 device_id = 10;
+  uint32 device_id = 10 [(field_ifdef) = "USE_DEVICES"];
 }
 message SwitchStateResponse {
   option (id) = 26;
@@ -633,16 +639,18 @@ message SwitchStateResponse {
 
   fixed32 key = 1;
   bool state = 2;
-  uint32 device_id = 3;
+  uint32 device_id = 3 [(field_ifdef) = "USE_DEVICES"];
 }
 message SwitchCommandRequest {
   option (id) = 33;
   option (source) = SOURCE_CLIENT;
   option (ifdef) = "USE_SWITCH";
   option (no_delay) = true;
+  option (base_class) = "CommandProtoMessage";
 
   fixed32 key = 1;
   bool state = 2;
+  uint32 device_id = 3 [(field_ifdef) = "USE_DEVICES"];
 }
 
 // ==================== TEXT SENSOR ====================
@@ -655,13 +663,13 @@ message ListEntitiesTextSensorResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
 
-  string icon = 5;
+  string icon = 5 [(field_ifdef) = "USE_ENTITY_ICON"];
   bool disabled_by_default = 6;
   EntityCategory entity_category = 7;
   string device_class = 8;
-  uint32 device_id = 9;
+  uint32 device_id = 9 [(field_ifdef) = "USE_DEVICES"];
 }
 message TextSensorStateResponse {
   option (id) = 27;
@@ -675,7 +683,7 @@ message TextSensorStateResponse {
   // If the text sensor does not have a valid state yet.
   // Equivalent to `!obj->has_state()` - inverse logic to make state packets smaller
   bool missing_state = 3;
-  uint32 device_id = 4;
+  uint32 device_id = 4 [(field_ifdef) = "USE_DEVICES"];
 }
 
 // ==================== SUBSCRIBE LOGS ====================
@@ -799,18 +807,21 @@ enum ServiceArgType {
   SERVICE_ARG_TYPE_STRING_ARRAY = 7;
 }
 message ListEntitiesServicesArgument {
+  option (ifdef) = "USE_API_SERVICES";
   string name = 1;
   ServiceArgType type = 2;
 }
 message ListEntitiesServicesResponse {
   option (id) = 41;
   option (source) = SOURCE_SERVER;
+  option (ifdef) = "USE_API_SERVICES";
 
   string name = 1;
   fixed32 key = 2;
   repeated ListEntitiesServicesArgument args = 3;
 }
 message ExecuteServiceArgument {
+  option (ifdef) = "USE_API_SERVICES";
   bool bool_ = 1;
   int32 legacy_int = 2;
   float float_ = 3;
@@ -826,6 +837,7 @@ message ExecuteServiceRequest {
   option (id) = 42;
   option (source) = SOURCE_CLIENT;
   option (no_delay) = true;
+  option (ifdef) = "USE_API_SERVICES";
 
   fixed32 key = 1;
   repeated ExecuteServiceArgument args = 2;
@@ -841,21 +853,23 @@ message ListEntitiesCameraResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
   bool disabled_by_default = 5;
-  string icon = 6;
+  string icon = 6 [(field_ifdef) = "USE_ENTITY_ICON"];
   EntityCategory entity_category = 7;
-  uint32 device_id = 8;
+  uint32 device_id = 8 [(field_ifdef) = "USE_DEVICES"];
 }
 
 message CameraImageResponse {
   option (id) = 44;
+  option (base_class) = "StateResponseProtoMessage";
   option (source) = SOURCE_SERVER;
   option (ifdef) = "USE_CAMERA";
 
   fixed32 key = 1;
   bytes data = 2;
   bool done = 3;
+  uint32 device_id = 4 [(field_ifdef) = "USE_DEVICES"];
 }
 message CameraImageRequest {
   option (id) = 45;
@@ -923,7 +937,7 @@ message ListEntitiesClimateResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
 
   bool supports_current_temperature = 5;
   bool supports_two_point_target_temperature = 6;
@@ -941,14 +955,14 @@ message ListEntitiesClimateResponse {
   repeated ClimatePreset supported_presets = 16;
   repeated string supported_custom_presets = 17;
   bool disabled_by_default = 18;
-  string icon = 19;
+  string icon = 19 [(field_ifdef) = "USE_ENTITY_ICON"];
   EntityCategory entity_category = 20;
   float visual_current_temperature_step = 21;
   bool supports_current_humidity = 22;
   bool supports_target_humidity = 23;
   float visual_min_humidity = 24;
   float visual_max_humidity = 25;
-  uint32 device_id = 26;
+  uint32 device_id = 26 [(field_ifdef) = "USE_DEVICES"];
 }
 message ClimateStateResponse {
   option (id) = 47;
@@ -973,13 +987,14 @@ message ClimateStateResponse {
   string custom_preset = 13;
   float current_humidity = 14;
   float target_humidity = 15;
-  uint32 device_id = 16;
+  uint32 device_id = 16 [(field_ifdef) = "USE_DEVICES"];
 }
 message ClimateCommandRequest {
   option (id) = 48;
   option (source) = SOURCE_CLIENT;
   option (ifdef) = "USE_CLIMATE";
   option (no_delay) = true;
+  option (base_class) = "CommandProtoMessage";
 
   fixed32 key = 1;
   bool has_mode = 2;
@@ -1005,6 +1020,7 @@ message ClimateCommandRequest {
   string custom_preset = 21;
   bool has_target_humidity = 22;
   float target_humidity = 23;
+  uint32 device_id = 24 [(field_ifdef) = "USE_DEVICES"];
 }
 
 // ==================== NUMBER ====================
@@ -1022,9 +1038,9 @@ message ListEntitiesNumberResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
 
-  string icon = 5;
+  string icon = 5 [(field_ifdef) = "USE_ENTITY_ICON"];
   float min_value = 6;
   float max_value = 7;
   float step = 8;
@@ -1033,7 +1049,7 @@ message ListEntitiesNumberResponse {
   string unit_of_measurement = 11;
   NumberMode mode = 12;
   string device_class = 13;
-  uint32 device_id = 14;
+  uint32 device_id = 14 [(field_ifdef) = "USE_DEVICES"];
 }
 message NumberStateResponse {
   option (id) = 50;
@@ -1047,16 +1063,18 @@ message NumberStateResponse {
   // If the number does not have a valid state yet.
   // Equivalent to `!obj->has_state()` - inverse logic to make state packets smaller
   bool missing_state = 3;
-  uint32 device_id = 4;
+  uint32 device_id = 4 [(field_ifdef) = "USE_DEVICES"];
 }
 message NumberCommandRequest {
   option (id) = 51;
   option (source) = SOURCE_CLIENT;
   option (ifdef) = "USE_NUMBER";
   option (no_delay) = true;
+  option (base_class) = "CommandProtoMessage";
 
   fixed32 key = 1;
   float state = 2;
+  uint32 device_id = 3 [(field_ifdef) = "USE_DEVICES"];
 }
 
 // ==================== SELECT ====================
@@ -1069,13 +1087,13 @@ message ListEntitiesSelectResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
 
-  string icon = 5;
+  string icon = 5 [(field_ifdef) = "USE_ENTITY_ICON"];
   repeated string options = 6;
   bool disabled_by_default = 7;
   EntityCategory entity_category = 8;
-  uint32 device_id = 9;
+  uint32 device_id = 9 [(field_ifdef) = "USE_DEVICES"];
 }
 message SelectStateResponse {
   option (id) = 53;
@@ -1089,16 +1107,18 @@ message SelectStateResponse {
   // If the select does not have a valid state yet.
   // Equivalent to `!obj->has_state()` - inverse logic to make state packets smaller
   bool missing_state = 3;
-  uint32 device_id = 4;
+  uint32 device_id = 4 [(field_ifdef) = "USE_DEVICES"];
 }
 message SelectCommandRequest {
   option (id) = 54;
   option (source) = SOURCE_CLIENT;
   option (ifdef) = "USE_SELECT";
   option (no_delay) = true;
+  option (base_class) = "CommandProtoMessage";
 
   fixed32 key = 1;
   string state = 2;
+  uint32 device_id = 3 [(field_ifdef) = "USE_DEVICES"];
 }
 
 // ==================== SIREN ====================
@@ -1111,15 +1131,15 @@ message ListEntitiesSirenResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
 
-  string icon = 5;
+  string icon = 5 [(field_ifdef) = "USE_ENTITY_ICON"];
   bool disabled_by_default = 6;
   repeated string tones = 7;
   bool supports_duration = 8;
   bool supports_volume = 9;
   EntityCategory entity_category = 10;
-  uint32 device_id = 11;
+  uint32 device_id = 11 [(field_ifdef) = "USE_DEVICES"];
 }
 message SirenStateResponse {
   option (id) = 56;
@@ -1130,13 +1150,14 @@ message SirenStateResponse {
 
   fixed32 key = 1;
   bool state = 2;
-  uint32 device_id = 3;
+  uint32 device_id = 3 [(field_ifdef) = "USE_DEVICES"];
 }
 message SirenCommandRequest {
   option (id) = 57;
   option (source) = SOURCE_CLIENT;
   option (ifdef) = "USE_SIREN";
   option (no_delay) = true;
+  option (base_class) = "CommandProtoMessage";
 
   fixed32 key = 1;
   bool has_state = 2;
@@ -1147,6 +1168,7 @@ message SirenCommandRequest {
   uint32 duration = 7;
   bool has_volume = 8;
   float volume = 9;
+  uint32 device_id = 10 [(field_ifdef) = "USE_DEVICES"];
 }
 
 // ==================== LOCK ====================
@@ -1172,9 +1194,9 @@ message ListEntitiesLockResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
 
-  string icon = 5;
+  string icon = 5 [(field_ifdef) = "USE_ENTITY_ICON"];
   bool disabled_by_default = 6;
   EntityCategory entity_category = 7;
   bool assumed_state = 8;
@@ -1184,7 +1206,7 @@ message ListEntitiesLockResponse {
 
   // Not yet implemented:
   string code_format = 11;
-  uint32 device_id = 12;
+  uint32 device_id = 12 [(field_ifdef) = "USE_DEVICES"];
 }
 message LockStateResponse {
   option (id) = 59;
@@ -1194,19 +1216,21 @@ message LockStateResponse {
   option (no_delay) = true;
   fixed32 key = 1;
   LockState state = 2;
-  uint32 device_id = 3;
+  uint32 device_id = 3 [(field_ifdef) = "USE_DEVICES"];
 }
 message LockCommandRequest {
   option (id) = 60;
   option (source) = SOURCE_CLIENT;
   option (ifdef) = "USE_LOCK";
   option (no_delay) = true;
+  option (base_class) = "CommandProtoMessage";
   fixed32 key = 1;
   LockCommand command = 2;
 
   // Not yet implemented:
   bool has_code = 3;
   string code = 4;
+  uint32 device_id = 5 [(field_ifdef) = "USE_DEVICES"];
 }
 
 // ==================== BUTTON ====================
@@ -1219,21 +1243,23 @@ message ListEntitiesButtonResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
 
-  string icon = 5;
+  string icon = 5 [(field_ifdef) = "USE_ENTITY_ICON"];
   bool disabled_by_default = 6;
   EntityCategory entity_category = 7;
   string device_class = 8;
-  uint32 device_id = 9;
+  uint32 device_id = 9 [(field_ifdef) = "USE_DEVICES"];
 }
 message ButtonCommandRequest {
   option (id) = 62;
   option (source) = SOURCE_CLIENT;
   option (ifdef) = "USE_BUTTON";
   option (no_delay) = true;
+  option (base_class) = "CommandProtoMessage";
 
   fixed32 key = 1;
+  uint32 device_id = 2 [(field_ifdef) = "USE_DEVICES"];
 }
 
 // ==================== MEDIA PLAYER ====================
@@ -1272,9 +1298,9 @@ message ListEntitiesMediaPlayerResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
 
-  string icon = 5;
+  string icon = 5 [(field_ifdef) = "USE_ENTITY_ICON"];
   bool disabled_by_default = 6;
   EntityCategory entity_category = 7;
 
@@ -1282,7 +1308,7 @@ message ListEntitiesMediaPlayerResponse {
 
   repeated MediaPlayerSupportedFormat supported_formats = 9;
 
-  uint32 device_id = 10;
+  uint32 device_id = 10 [(field_ifdef) = "USE_DEVICES"];
 }
 message MediaPlayerStateResponse {
   option (id) = 64;
@@ -1294,13 +1320,14 @@ message MediaPlayerStateResponse {
   MediaPlayerState state = 2;
   float volume = 3;
   bool muted = 4;
-  uint32 device_id = 5;
+  uint32 device_id = 5 [(field_ifdef) = "USE_DEVICES"];
 }
 message MediaPlayerCommandRequest {
   option (id) = 65;
   option (source) = SOURCE_CLIENT;
   option (ifdef) = "USE_MEDIA_PLAYER";
   option (no_delay) = true;
+  option (base_class) = "CommandProtoMessage";
 
   fixed32 key = 1;
 
@@ -1315,6 +1342,7 @@ message MediaPlayerCommandRequest {
 
   bool has_announcement = 8;
   bool announcement = 9;
+  uint32 device_id = 10 [(field_ifdef) = "USE_DEVICES"];
 }
 
 // ==================== BLUETOOTH ====================
@@ -1817,14 +1845,14 @@ message ListEntitiesAlarmControlPanelResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
-  string icon = 5;
+  reserved 4; // Deprecated: was string unique_id
+  string icon = 5 [(field_ifdef) = "USE_ENTITY_ICON"];
   bool disabled_by_default = 6;
   EntityCategory entity_category = 7;
   uint32 supported_features = 8;
   bool requires_code = 9;
   bool requires_code_to_arm = 10;
-  uint32 device_id = 11;
+  uint32 device_id = 11 [(field_ifdef) = "USE_DEVICES"];
 }
 
 message AlarmControlPanelStateResponse {
@@ -1835,7 +1863,7 @@ message AlarmControlPanelStateResponse {
   option (no_delay) = true;
   fixed32 key = 1;
   AlarmControlPanelState state = 2;
-  uint32 device_id = 3;
+  uint32 device_id = 3 [(field_ifdef) = "USE_DEVICES"];
 }
 
 message AlarmControlPanelCommandRequest {
@@ -1843,9 +1871,11 @@ message AlarmControlPanelCommandRequest {
   option (source) = SOURCE_CLIENT;
   option (ifdef) = "USE_ALARM_CONTROL_PANEL";
   option (no_delay) = true;
+  option (base_class) = "CommandProtoMessage";
   fixed32 key = 1;
   AlarmControlPanelStateCommand command = 2;
   string code = 3;
+  uint32 device_id = 4 [(field_ifdef) = "USE_DEVICES"];
 }
 
 // ===================== TEXT =====================
@@ -1862,8 +1892,8 @@ message ListEntitiesTextResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
-  string icon = 5;
+  reserved 4; // Deprecated: was string unique_id
+  string icon = 5 [(field_ifdef) = "USE_ENTITY_ICON"];
   bool disabled_by_default = 6;
   EntityCategory entity_category = 7;
 
@@ -1871,7 +1901,7 @@ message ListEntitiesTextResponse {
   uint32 max_length = 9;
   string pattern = 10;
   TextMode mode = 11;
-  uint32 device_id = 12;
+  uint32 device_id = 12 [(field_ifdef) = "USE_DEVICES"];
 }
 message TextStateResponse {
   option (id) = 98;
@@ -1885,16 +1915,18 @@ message TextStateResponse {
   // If the Text does not have a valid state yet.
   // Equivalent to `!obj->has_state()` - inverse logic to make state packets smaller
   bool missing_state = 3;
-  uint32 device_id = 4;
+  uint32 device_id = 4 [(field_ifdef) = "USE_DEVICES"];
 }
 message TextCommandRequest {
   option (id) = 99;
   option (source) = SOURCE_CLIENT;
   option (ifdef) = "USE_TEXT";
   option (no_delay) = true;
+  option (base_class) = "CommandProtoMessage";
 
   fixed32 key = 1;
   string state = 2;
+  uint32 device_id = 3 [(field_ifdef) = "USE_DEVICES"];
 }
 
 
@@ -1908,12 +1940,12 @@ message ListEntitiesDateResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
 
-  string icon = 5;
+  string icon = 5 [(field_ifdef) = "USE_ENTITY_ICON"];
   bool disabled_by_default = 6;
   EntityCategory entity_category = 7;
-  uint32 device_id = 8;
+  uint32 device_id = 8 [(field_ifdef) = "USE_DEVICES"];
 }
 message DateStateResponse {
   option (id) = 101;
@@ -1929,18 +1961,20 @@ message DateStateResponse {
   uint32 year = 3;
   uint32 month = 4;
   uint32 day = 5;
-  uint32 device_id = 6;
+  uint32 device_id = 6 [(field_ifdef) = "USE_DEVICES"];
 }
 message DateCommandRequest {
   option (id) = 102;
   option (source) = SOURCE_CLIENT;
   option (ifdef) = "USE_DATETIME_DATE";
   option (no_delay) = true;
+  option (base_class) = "CommandProtoMessage";
 
   fixed32 key = 1;
   uint32 year = 2;
   uint32 month = 3;
   uint32 day = 4;
+  uint32 device_id = 5 [(field_ifdef) = "USE_DEVICES"];
 }
 
 // ==================== DATETIME TIME ====================
@@ -1953,12 +1987,12 @@ message ListEntitiesTimeResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
 
-  string icon = 5;
+  string icon = 5 [(field_ifdef) = "USE_ENTITY_ICON"];
   bool disabled_by_default = 6;
   EntityCategory entity_category = 7;
-  uint32 device_id = 8;
+  uint32 device_id = 8 [(field_ifdef) = "USE_DEVICES"];
 }
 message TimeStateResponse {
   option (id) = 104;
@@ -1974,18 +2008,20 @@ message TimeStateResponse {
   uint32 hour = 3;
   uint32 minute = 4;
   uint32 second = 5;
-  uint32 device_id = 6;
+  uint32 device_id = 6 [(field_ifdef) = "USE_DEVICES"];
 }
 message TimeCommandRequest {
   option (id) = 105;
   option (source) = SOURCE_CLIENT;
   option (ifdef) = "USE_DATETIME_TIME";
   option (no_delay) = true;
+  option (base_class) = "CommandProtoMessage";
 
   fixed32 key = 1;
   uint32 hour = 2;
   uint32 minute = 3;
   uint32 second = 4;
+  uint32 device_id = 5 [(field_ifdef) = "USE_DEVICES"];
 }
 
 // ==================== EVENT ====================
@@ -1998,15 +2034,15 @@ message ListEntitiesEventResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
 
-  string icon = 5;
+  string icon = 5 [(field_ifdef) = "USE_ENTITY_ICON"];
   bool disabled_by_default = 6;
   EntityCategory entity_category = 7;
   string device_class = 8;
 
   repeated string event_types = 9;
-  uint32 device_id = 10;
+  uint32 device_id = 10 [(field_ifdef) = "USE_DEVICES"];
 }
 message EventResponse {
   option (id) = 108;
@@ -2016,7 +2052,7 @@ message EventResponse {
 
   fixed32 key = 1;
   string event_type = 2;
-  uint32 device_id = 3;
+  uint32 device_id = 3 [(field_ifdef) = "USE_DEVICES"];
 }
 
 // ==================== VALVE ====================
@@ -2029,9 +2065,9 @@ message ListEntitiesValveResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
 
-  string icon = 5;
+  string icon = 5 [(field_ifdef) = "USE_ENTITY_ICON"];
   bool disabled_by_default = 6;
   EntityCategory entity_category = 7;
   string device_class = 8;
@@ -2039,7 +2075,7 @@ message ListEntitiesValveResponse {
   bool assumed_state = 9;
   bool supports_position = 10;
   bool supports_stop = 11;
-  uint32 device_id = 12;
+  uint32 device_id = 12 [(field_ifdef) = "USE_DEVICES"];
 }
 
 enum ValveOperation {
@@ -2057,7 +2093,7 @@ message ValveStateResponse {
   fixed32 key = 1;
   float position = 2;
   ValveOperation current_operation = 3;
-  uint32 device_id = 4;
+  uint32 device_id = 4 [(field_ifdef) = "USE_DEVICES"];
 }
 
 message ValveCommandRequest {
@@ -2065,11 +2101,13 @@ message ValveCommandRequest {
   option (source) = SOURCE_CLIENT;
   option (ifdef) = "USE_VALVE";
   option (no_delay) = true;
+  option (base_class) = "CommandProtoMessage";
 
   fixed32 key = 1;
   bool has_position = 2;
   float position = 3;
   bool stop = 4;
+  uint32 device_id = 5 [(field_ifdef) = "USE_DEVICES"];
 }
 
 // ==================== DATETIME DATETIME ====================
@@ -2082,12 +2120,12 @@ message ListEntitiesDateTimeResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
 
-  string icon = 5;
+  string icon = 5 [(field_ifdef) = "USE_ENTITY_ICON"];
   bool disabled_by_default = 6;
   EntityCategory entity_category = 7;
-  uint32 device_id = 8;
+  uint32 device_id = 8 [(field_ifdef) = "USE_DEVICES"];
 }
 message DateTimeStateResponse {
   option (id) = 113;
@@ -2101,16 +2139,18 @@ message DateTimeStateResponse {
   // Equivalent to `!obj->has_state()` - inverse logic to make state packets smaller
   bool missing_state = 2;
   fixed32 epoch_seconds = 3;
-  uint32 device_id = 4;
+  uint32 device_id = 4 [(field_ifdef) = "USE_DEVICES"];
 }
 message DateTimeCommandRequest {
   option (id) = 114;
   option (source) = SOURCE_CLIENT;
   option (ifdef) = "USE_DATETIME_DATETIME";
   option (no_delay) = true;
+  option (base_class) = "CommandProtoMessage";
 
   fixed32 key = 1;
   fixed32 epoch_seconds = 2;
+  uint32 device_id = 3 [(field_ifdef) = "USE_DEVICES"];
 }
 
 // ==================== UPDATE ====================
@@ -2123,13 +2163,13 @@ message ListEntitiesUpdateResponse {
   string object_id = 1;
   fixed32 key = 2;
   string name = 3;
-  string unique_id = 4;
+  reserved 4; // Deprecated: was string unique_id
 
-  string icon = 5;
+  string icon = 5 [(field_ifdef) = "USE_ENTITY_ICON"];
   bool disabled_by_default = 6;
   EntityCategory entity_category = 7;
   string device_class = 8;
-  uint32 device_id = 9;
+  uint32 device_id = 9 [(field_ifdef) = "USE_DEVICES"];
 }
 message UpdateStateResponse {
   option (id) = 117;
@@ -2148,7 +2188,7 @@ message UpdateStateResponse {
   string title = 8;
   string release_summary = 9;
   string release_url = 10;
-  uint32 device_id = 11;
+  uint32 device_id = 11 [(field_ifdef) = "USE_DEVICES"];
 }
 enum UpdateCommand {
   UPDATE_COMMAND_NONE = 0;
@@ -2160,7 +2200,9 @@ message UpdateCommandRequest {
   option (source) = SOURCE_CLIENT;
   option (ifdef) = "USE_UPDATE";
   option (no_delay) = true;
+  option (base_class) = "CommandProtoMessage";
 
   fixed32 key = 1;
   UpdateCommand command = 2;
+  uint32 device_id = 3 [(field_ifdef) = "USE_DEVICES"];
 }

esphome/components/api/api_connection.cpp

@@ -86,8 +86,8 @@ void APIConnection::start() {
   APIError err = this->helper_->init();
   if (err != APIError::OK) {
     on_fatal_error();
-    ESP_LOGW(TAG, "%s: Helper init failed: %s errno=%d", this->get_client_combined_info().c_str(),
-             api_error_to_str(err), errno);
+    ESP_LOGW(TAG, "%s: Helper init failed %s errno=%d", this->get_client_combined_info().c_str(), api_error_to_str(err),
+             errno);
     return;
   }
   this->client_info_ = helper_->getpeername();
@@ -119,7 +119,7 @@ void APIConnection::loop() {
   APIError err = this->helper_->loop();
   if (err != APIError::OK) {
     on_fatal_error();
-    ESP_LOGW(TAG, "%s: Socket operation failed: %s errno=%d", this->get_client_combined_info().c_str(),
+    ESP_LOGW(TAG, "%s: Socket operation failed %s errno=%d", this->get_client_combined_info().c_str(),
              api_error_to_str(err), errno);
     return;
   }
@@ -136,14 +136,8 @@ void APIConnection::loop() {
         break;
       } else if (err != APIError::OK) {
         on_fatal_error();
-        if (err == APIError::SOCKET_READ_FAILED && errno == ECONNRESET) {
-          ESP_LOGW(TAG, "%s: Connection reset", this->get_client_combined_info().c_str());
-        } else if (err == APIError::CONNECTION_CLOSED) {
-          ESP_LOGW(TAG, "%s: Connection closed", this->get_client_combined_info().c_str());
-        } else {
-          ESP_LOGW(TAG, "%s: Reading failed: %s errno=%d", this->get_client_combined_info().c_str(),
-                   api_error_to_str(err), errno);
-        }
+        ESP_LOGW(TAG, "%s: Reading failed %s errno=%d", this->get_client_combined_info().c_str(), api_error_to_str(err),
+                 errno);
         return;
       } else {
         this->last_traffic_ = now;
@@ -186,7 +180,8 @@ void APIConnection::loop() {
       on_fatal_error();
       ESP_LOGW(TAG, "%s is unresponsive; disconnecting", this->get_client_combined_info().c_str());
     }
-  } else if (now - this->last_traffic_ > KEEPALIVE_TIMEOUT_MS) {
+  } else if (now - this->last_traffic_ > KEEPALIVE_TIMEOUT_MS && !this->flags_.remove) {
+    // Only send ping if we're not disconnecting
     ESP_LOGVV(TAG, "Sending keepalive PING");
     this->flags_.sent_ping = this->send_message(PingRequest());
     if (!this->flags_.sent_ping) {
@@ -201,7 +196,7 @@ void APIConnection::loop() {
 
 #ifdef USE_CAMERA
   if (this->image_reader_ && this->image_reader_->available() && this->helper_->can_write_without_blocking()) {
-    uint32_t to_send = std::min((size_t) MAX_PACKET_SIZE, this->image_reader_->available());
+    uint32_t to_send = std::min((size_t) MAX_BATCH_PACKET_SIZE, this->image_reader_->available());
     bool done = this->image_reader_->available() == to_send;
     uint32_t msg_size = 0;
     ProtoSize::add_fixed_field<4>(msg_size, 1, true);
@@ -246,10 +241,6 @@ void APIConnection::loop() {
   }
 }
 
-std::string get_default_unique_id(const std::string &component_type, EntityBase *entity) {
-  return App.get_name() + component_type + entity->get_object_id();
-}
-
 DisconnectResponse APIConnection::disconnect(const DisconnectRequest &msg) {
   // remote initiated disconnect_client
   // don't close yet, we still need to send the disconnect response
@@ -326,8 +317,8 @@ uint16_t APIConnection::try_send_binary_sensor_state(EntityBase *entity, APIConn
   BinarySensorStateResponse resp;
   resp.state = binary_sensor->state;
   resp.missing_state = !binary_sensor->has_state();
-  fill_entity_state_base(binary_sensor, resp);
-  return encode_message_to_buffer(resp, BinarySensorStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(binary_sensor, resp, BinarySensorStateResponse::MESSAGE_TYPE, conn,
+                                      remaining_size, is_single);
 }
 
 uint16_t APIConnection::try_send_binary_sensor_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
@@ -336,9 +327,8 @@ uint16_t APIConnection::try_send_binary_sensor_info(EntityBase *entity, APIConne
   ListEntitiesBinarySensorResponse msg;
   msg.device_class = binary_sensor->get_device_class();
   msg.is_status_binary_sensor = binary_sensor->is_status_binary_sensor();
-  msg.unique_id = get_default_unique_id("binary_sensor", binary_sensor);
-  fill_entity_info_base(binary_sensor, msg);
-  return encode_message_to_buffer(msg, ListEntitiesBinarySensorResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(binary_sensor, msg, ListEntitiesBinarySensorResponse::MESSAGE_TYPE, conn,
+                                     remaining_size, is_single);
 }
 #endif
 
@@ -358,8 +348,7 @@ uint16_t APIConnection::try_send_cover_state(EntityBase *entity, APIConnection *
   if (traits.get_supports_tilt())
     msg.tilt = cover->tilt;
   msg.current_operation = static_cast<enums::CoverOperation>(cover->current_operation);
-  fill_entity_state_base(cover, msg);
-  return encode_message_to_buffer(msg, CoverStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(cover, msg, CoverStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }
 uint16_t APIConnection::try_send_cover_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
                                             bool is_single) {
@@ -371,9 +360,8 @@ uint16_t APIConnection::try_send_cover_info(EntityBase *entity, APIConnection *c
   msg.supports_tilt = traits.get_supports_tilt();
   msg.supports_stop = traits.get_supports_stop();
   msg.device_class = cover->get_device_class();
-  msg.unique_id = get_default_unique_id("cover", cover);
-  fill_entity_info_base(cover, msg);
-  return encode_message_to_buffer(msg, ListEntitiesCoverResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(cover, msg, ListEntitiesCoverResponse::MESSAGE_TYPE, conn, remaining_size,
+                                     is_single);
 }
 void APIConnection::cover_command(const CoverCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(cover::Cover, cover, cover)
@@ -420,8 +408,7 @@ uint16_t APIConnection::try_send_fan_state(EntityBase *entity, APIConnection *co
     msg.direction = static_cast<enums::FanDirection>(fan->direction);
   if (traits.supports_preset_modes())
     msg.preset_mode = fan->preset_mode;
-  fill_entity_state_base(fan, msg);
-  return encode_message_to_buffer(msg, FanStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(fan, msg, FanStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }
 uint16_t APIConnection::try_send_fan_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
                                           bool is_single) {
@@ -434,9 +421,7 @@ uint16_t APIConnection::try_send_fan_info(EntityBase *entity, APIConnection *con
   msg.supported_speed_count = traits.supported_speed_count();
   for (auto const &preset : traits.supported_preset_modes())
     msg.supported_preset_modes.push_back(preset);
-  msg.unique_id = get_default_unique_id("fan", fan);
-  fill_entity_info_base(fan, msg);
-  return encode_message_to_buffer(msg, ListEntitiesFanResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(fan, msg, ListEntitiesFanResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }
 void APIConnection::fan_command(const FanCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(fan::Fan, fan, fan)
@@ -481,8 +466,7 @@ uint16_t APIConnection::try_send_light_state(EntityBase *entity, APIConnection *
   resp.warm_white = values.get_warm_white();
   if (light->supports_effects())
     resp.effect = light->get_effect_name();
-  fill_entity_state_base(light, resp);
-  return encode_message_to_buffer(resp, LightStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(light, resp, LightStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }
 uint16_t APIConnection::try_send_light_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
                                             bool is_single) {
@@ -508,9 +492,8 @@ uint16_t APIConnection::try_send_light_info(EntityBase *entity, APIConnection *c
       msg.effects.push_back(effect->get_name());
     }
   }
-  msg.unique_id = get_default_unique_id("light", light);
-  fill_entity_info_base(light, msg);
-  return encode_message_to_buffer(msg, ListEntitiesLightResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(light, msg, ListEntitiesLightResponse::MESSAGE_TYPE, conn, remaining_size,
+                                     is_single);
 }
 void APIConnection::light_command(const LightCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(light::LightState, light, light)
@@ -557,8 +540,7 @@ uint16_t APIConnection::try_send_sensor_state(EntityBase *entity, APIConnection
   SensorStateResponse resp;
   resp.state = sensor->state;
   resp.missing_state = !sensor->has_state();
-  fill_entity_state_base(sensor, resp);
-  return encode_message_to_buffer(resp, SensorStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(sensor, resp, SensorStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }
 
 uint16_t APIConnection::try_send_sensor_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
@@ -570,11 +552,8 @@ uint16_t APIConnection::try_send_sensor_info(EntityBase *entity, APIConnection *
   msg.force_update = sensor->get_force_update();
   msg.device_class = sensor->get_device_class();
   msg.state_class = static_cast<enums::SensorStateClass>(sensor->get_state_class());
-  msg.unique_id = sensor->unique_id();
-  if (msg.unique_id.empty())
-    msg.unique_id = get_default_unique_id("sensor", sensor);
-  fill_entity_info_base(sensor, msg);
-  return encode_message_to_buffer(msg, ListEntitiesSensorResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(sensor, msg, ListEntitiesSensorResponse::MESSAGE_TYPE, conn, remaining_size,
+                                     is_single);
 }
 #endif
 
@@ -589,8 +568,8 @@ uint16_t APIConnection::try_send_switch_state(EntityBase *entity, APIConnection
   auto *a_switch = static_cast<switch_::Switch *>(entity);
   SwitchStateResponse resp;
   resp.state = a_switch->state;
-  fill_entity_state_base(a_switch, resp);
-  return encode_message_to_buffer(resp, SwitchStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(a_switch, resp, SwitchStateResponse::MESSAGE_TYPE, conn, remaining_size,
+                                      is_single);
 }
 
 uint16_t APIConnection::try_send_switch_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
@@ -599,9 +578,8 @@ uint16_t APIConnection::try_send_switch_info(EntityBase *entity, APIConnection *
   ListEntitiesSwitchResponse msg;
   msg.assumed_state = a_switch->assumed_state();
   msg.device_class = a_switch->get_device_class();
-  msg.unique_id = get_default_unique_id("switch", a_switch);
-  fill_entity_info_base(a_switch, msg);
-  return encode_message_to_buffer(msg, ListEntitiesSwitchResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(a_switch, msg, ListEntitiesSwitchResponse::MESSAGE_TYPE, conn, remaining_size,
+                                     is_single);
 }
 void APIConnection::switch_command(const SwitchCommandRequest &msg) {
   ENTITY_COMMAND_GET(switch_::Switch, a_switch, switch)
@@ -626,19 +604,16 @@ uint16_t APIConnection::try_send_text_sensor_state(EntityBase *entity, APIConnec
   TextSensorStateResponse resp;
   resp.state = text_sensor->state;
   resp.missing_state = !text_sensor->has_state();
-  fill_entity_state_base(text_sensor, resp);
-  return encode_message_to_buffer(resp, TextSensorStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(text_sensor, resp, TextSensorStateResponse::MESSAGE_TYPE, conn, remaining_size,
+                                      is_single);
 }
 uint16_t APIConnection::try_send_text_sensor_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
                                                   bool is_single) {
   auto *text_sensor = static_cast<text_sensor::TextSensor *>(entity);
   ListEntitiesTextSensorResponse msg;
   msg.device_class = text_sensor->get_device_class();
-  msg.unique_id = text_sensor->unique_id();
-  if (msg.unique_id.empty())
-    msg.unique_id = get_default_unique_id("text_sensor", text_sensor);
-  fill_entity_info_base(text_sensor, msg);
-  return encode_message_to_buffer(msg, ListEntitiesTextSensorResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(text_sensor, msg, ListEntitiesTextSensorResponse::MESSAGE_TYPE, conn,
+                                     remaining_size, is_single);
 }
 #endif
 
@@ -651,7 +626,6 @@ uint16_t APIConnection::try_send_climate_state(EntityBase *entity, APIConnection
                                                bool is_single) {
   auto *climate = static_cast<climate::Climate *>(entity);
   ClimateStateResponse resp;
-  fill_entity_state_base(climate, resp);
   auto traits = climate->get_traits();
   resp.mode = static_cast<enums::ClimateMode>(climate->mode);
   resp.action = static_cast<enums::ClimateAction>(climate->action);
@@ -678,7 +652,8 @@ uint16_t APIConnection::try_send_climate_state(EntityBase *entity, APIConnection
     resp.current_humidity = climate->current_humidity;
   if (traits.get_supports_target_humidity())
     resp.target_humidity = climate->target_humidity;
-  return encode_message_to_buffer(resp, ClimateStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(climate, resp, ClimateStateResponse::MESSAGE_TYPE, conn, remaining_size,
+                                      is_single);
 }
 uint16_t APIConnection::try_send_climate_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
                                               bool is_single) {
@@ -709,9 +684,8 @@ uint16_t APIConnection::try_send_climate_info(EntityBase *entity, APIConnection
     msg.supported_custom_presets.push_back(custom_preset);
   for (auto swing_mode : traits.get_supported_swing_modes())
     msg.supported_swing_modes.push_back(static_cast<enums::ClimateSwingMode>(swing_mode));
-  msg.unique_id = get_default_unique_id("climate", climate);
-  fill_entity_info_base(climate, msg);
-  return encode_message_to_buffer(msg, ListEntitiesClimateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(climate, msg, ListEntitiesClimateResponse::MESSAGE_TYPE, conn, remaining_size,
+                                     is_single);
 }
 void APIConnection::climate_command(const ClimateCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(climate::Climate, climate, climate)
@@ -751,8 +725,7 @@ uint16_t APIConnection::try_send_number_state(EntityBase *entity, APIConnection
   NumberStateResponse resp;
   resp.state = number->state;
   resp.missing_state = !number->has_state();
-  fill_entity_state_base(number, resp);
-  return encode_message_to_buffer(resp, NumberStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(number, resp, NumberStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }
 
 uint16_t APIConnection::try_send_number_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
@@ -765,9 +738,8 @@ uint16_t APIConnection::try_send_number_info(EntityBase *entity, APIConnection *
   msg.min_value = number->traits.get_min_value();
   msg.max_value = number->traits.get_max_value();
   msg.step = number->traits.get_step();
-  msg.unique_id = get_default_unique_id("number", number);
-  fill_entity_info_base(number, msg);
-  return encode_message_to_buffer(msg, ListEntitiesNumberResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(number, msg, ListEntitiesNumberResponse::MESSAGE_TYPE, conn, remaining_size,
+                                     is_single);
 }
 void APIConnection::number_command(const NumberCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(number::Number, number, number)
@@ -789,16 +761,14 @@ uint16_t APIConnection::try_send_date_state(EntityBase *entity, APIConnection *c
   resp.year = date->year;
   resp.month = date->month;
   resp.day = date->day;
-  fill_entity_state_base(date, resp);
-  return encode_message_to_buffer(resp, DateStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(date, resp, DateStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }
 uint16_t APIConnection::try_send_date_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
                                            bool is_single) {
   auto *date = static_cast<datetime::DateEntity *>(entity);
   ListEntitiesDateResponse msg;
-  msg.unique_id = get_default_unique_id("date", date);
-  fill_entity_info_base(date, msg);
-  return encode_message_to_buffer(msg, ListEntitiesDateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(date, msg, ListEntitiesDateResponse::MESSAGE_TYPE, conn, remaining_size,
+                                     is_single);
 }
 void APIConnection::date_command(const DateCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(datetime::DateEntity, date, date)
@@ -820,16 +790,14 @@ uint16_t APIConnection::try_send_time_state(EntityBase *entity, APIConnection *c
   resp.hour = time->hour;
   resp.minute = time->minute;
   resp.second = time->second;
-  fill_entity_state_base(time, resp);
-  return encode_message_to_buffer(resp, TimeStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(time, resp, TimeStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }
 uint16_t APIConnection::try_send_time_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
                                            bool is_single) {
   auto *time = static_cast<datetime::TimeEntity *>(entity);
   ListEntitiesTimeResponse msg;
-  msg.unique_id = get_default_unique_id("time", time);
-  fill_entity_info_base(time, msg);
-  return encode_message_to_buffer(msg, ListEntitiesTimeResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(time, msg, ListEntitiesTimeResponse::MESSAGE_TYPE, conn, remaining_size,
+                                     is_single);
 }
 void APIConnection::time_command(const TimeCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(datetime::TimeEntity, time, time)
@@ -852,16 +820,15 @@ uint16_t APIConnection::try_send_datetime_state(EntityBase *entity, APIConnectio
     ESPTime state = datetime->state_as_esptime();
     resp.epoch_seconds = state.timestamp;
   }
-  fill_entity_state_base(datetime, resp);
-  return encode_message_to_buffer(resp, DateTimeStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(datetime, resp, DateTimeStateResponse::MESSAGE_TYPE, conn, remaining_size,
+                                      is_single);
 }
 uint16_t APIConnection::try_send_datetime_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
                                                bool is_single) {
   auto *datetime = static_cast<datetime::DateTimeEntity *>(entity);
   ListEntitiesDateTimeResponse msg;
-  msg.unique_id = get_default_unique_id("datetime", datetime);
-  fill_entity_info_base(datetime, msg);
-  return encode_message_to_buffer(msg, ListEntitiesDateTimeResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(datetime, msg, ListEntitiesDateTimeResponse::MESSAGE_TYPE, conn, remaining_size,
+                                     is_single);
 }
 void APIConnection::datetime_command(const DateTimeCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(datetime::DateTimeEntity, datetime, datetime)
@@ -882,8 +849,7 @@ uint16_t APIConnection::try_send_text_state(EntityBase *entity, APIConnection *c
   TextStateResponse resp;
   resp.state = text->state;
   resp.missing_state = !text->has_state();
-  fill_entity_state_base(text, resp);
-  return encode_message_to_buffer(resp, TextStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(text, resp, TextStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }
 
 uint16_t APIConnection::try_send_text_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
@@ -894,9 +860,8 @@ uint16_t APIConnection::try_send_text_info(EntityBase *entity, APIConnection *co
   msg.min_length = text->traits.get_min_length();
   msg.max_length = text->traits.get_max_length();
   msg.pattern = text->traits.get_pattern();
-  msg.unique_id = get_default_unique_id("text", text);
-  fill_entity_info_base(text, msg);
-  return encode_message_to_buffer(msg, ListEntitiesTextResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(text, msg, ListEntitiesTextResponse::MESSAGE_TYPE, conn, remaining_size,
+                                     is_single);
 }
 void APIConnection::text_command(const TextCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(text::Text, text, text)
@@ -917,8 +882,7 @@ uint16_t APIConnection::try_send_select_state(EntityBase *entity, APIConnection
   SelectStateResponse resp;
   resp.state = select->state;
   resp.missing_state = !select->has_state();
-  fill_entity_state_base(select, resp);
-  return encode_message_to_buffer(resp, SelectStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(select, resp, SelectStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }
 
 uint16_t APIConnection::try_send_select_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
@@ -927,9 +891,8 @@ uint16_t APIConnection::try_send_select_info(EntityBase *entity, APIConnection *
   ListEntitiesSelectResponse msg;
   for (const auto &option : select->traits.get_options())
     msg.options.push_back(option);
-  msg.unique_id = get_default_unique_id("select", select);
-  fill_entity_info_base(select, msg);
-  return encode_message_to_buffer(msg, ListEntitiesSelectResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(select, msg, ListEntitiesSelectResponse::MESSAGE_TYPE, conn, remaining_size,
+                                     is_single);
 }
 void APIConnection::select_command(const SelectCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(select::Select, select, select)
@@ -944,9 +907,8 @@ uint16_t APIConnection::try_send_button_info(EntityBase *entity, APIConnection *
   auto *button = static_cast<button::Button *>(entity);
   ListEntitiesButtonResponse msg;
   msg.device_class = button->get_device_class();
-  msg.unique_id = get_default_unique_id("button", button);
-  fill_entity_info_base(button, msg);
-  return encode_message_to_buffer(msg, ListEntitiesButtonResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(button, msg, ListEntitiesButtonResponse::MESSAGE_TYPE, conn, remaining_size,
+                                     is_single);
 }
 void esphome::api::APIConnection::button_command(const ButtonCommandRequest &msg) {
   ENTITY_COMMAND_GET(button::Button, button, button)
@@ -965,8 +927,7 @@ uint16_t APIConnection::try_send_lock_state(EntityBase *entity, APIConnection *c
   auto *a_lock = static_cast<lock::Lock *>(entity);
   LockStateResponse resp;
   resp.state = static_cast<enums::LockState>(a_lock->state);
-  fill_entity_state_base(a_lock, resp);
-  return encode_message_to_buffer(resp, LockStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(a_lock, resp, LockStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }
 
 uint16_t APIConnection::try_send_lock_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
@@ -976,9 +937,8 @@ uint16_t APIConnection::try_send_lock_info(EntityBase *entity, APIConnection *co
   msg.assumed_state = a_lock->traits.get_assumed_state();
   msg.supports_open = a_lock->traits.get_supports_open();
   msg.requires_code = a_lock->traits.get_requires_code();
-  msg.unique_id = get_default_unique_id("lock", a_lock);
-  fill_entity_info_base(a_lock, msg);
-  return encode_message_to_buffer(msg, ListEntitiesLockResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(a_lock, msg, ListEntitiesLockResponse::MESSAGE_TYPE, conn, remaining_size,
+                                     is_single);
 }
 void APIConnection::lock_command(const LockCommandRequest &msg) {
   ENTITY_COMMAND_GET(lock::Lock, a_lock, lock)
@@ -1008,8 +968,7 @@ uint16_t APIConnection::try_send_valve_state(EntityBase *entity, APIConnection *
   ValveStateResponse resp;
   resp.position = valve->position;
   resp.current_operation = static_cast<enums::ValveOperation>(valve->current_operation);
-  fill_entity_state_base(valve, resp);
-  return encode_message_to_buffer(resp, ValveStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(valve, resp, ValveStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }
 uint16_t APIConnection::try_send_valve_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
                                             bool is_single) {
@@ -1020,9 +979,8 @@ uint16_t APIConnection::try_send_valve_info(EntityBase *entity, APIConnection *c
   msg.assumed_state = traits.get_is_assumed_state();
   msg.supports_position = traits.get_supports_position();
   msg.supports_stop = traits.get_supports_stop();
-  msg.unique_id = get_default_unique_id("valve", valve);
-  fill_entity_info_base(valve, msg);
-  return encode_message_to_buffer(msg, ListEntitiesValveResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(valve, msg, ListEntitiesValveResponse::MESSAGE_TYPE, conn, remaining_size,
+                                     is_single);
 }
 void APIConnection::valve_command(const ValveCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(valve::Valve, valve, valve)
@@ -1049,8 +1007,8 @@ uint16_t APIConnection::try_send_media_player_state(EntityBase *entity, APIConne
   resp.state = static_cast<enums::MediaPlayerState>(report_state);
   resp.volume = media_player->volume;
   resp.muted = media_player->is_muted();
-  fill_entity_state_base(media_player, resp);
-  return encode_message_to_buffer(resp, MediaPlayerStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(media_player, resp, MediaPlayerStateResponse::MESSAGE_TYPE, conn, remaining_size,
+                                      is_single);
 }
 uint16_t APIConnection::try_send_media_player_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
                                                    bool is_single) {
@@ -1067,9 +1025,8 @@ uint16_t APIConnection::try_send_media_player_info(EntityBase *entity, APIConnec
     media_format.sample_bytes = supported_format.sample_bytes;
     msg.supported_formats.push_back(media_format);
   }
-  msg.unique_id = get_default_unique_id("media_player", media_player);
-  fill_entity_info_base(media_player, msg);
-  return encode_message_to_buffer(msg, ListEntitiesMediaPlayerResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(media_player, msg, ListEntitiesMediaPlayerResponse::MESSAGE_TYPE, conn,
+                                     remaining_size, is_single);
 }
 void APIConnection::media_player_command(const MediaPlayerCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(media_player::MediaPlayer, media_player, media_player)
@@ -1104,9 +1061,8 @@ uint16_t APIConnection::try_send_camera_info(EntityBase *entity, APIConnection *
                                              bool is_single) {
   auto *camera = static_cast<camera::Camera *>(entity);
   ListEntitiesCameraResponse msg;
-  msg.unique_id = get_default_unique_id("camera", camera);
-  fill_entity_info_base(camera, msg);
-  return encode_message_to_buffer(msg, ListEntitiesCameraResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(camera, msg, ListEntitiesCameraResponse::MESSAGE_TYPE, conn, remaining_size,
+                                     is_single);
 }
 void APIConnection::camera_image(const CameraImageRequest &msg) {
   if (camera::Camera::instance() == nullptr)
@@ -1284,8 +1240,8 @@ uint16_t APIConnection::try_send_alarm_control_panel_state(EntityBase *entity, A
   auto *a_alarm_control_panel = static_cast<alarm_control_panel::AlarmControlPanel *>(entity);
   AlarmControlPanelStateResponse resp;
   resp.state = static_cast<enums::AlarmControlPanelState>(a_alarm_control_panel->get_state());
-  fill_entity_state_base(a_alarm_control_panel, resp);
-  return encode_message_to_buffer(resp, AlarmControlPanelStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(a_alarm_control_panel, resp, AlarmControlPanelStateResponse::MESSAGE_TYPE, conn,
+                                      remaining_size, is_single);
 }
 uint16_t APIConnection::try_send_alarm_control_panel_info(EntityBase *entity, APIConnection *conn,
                                                           uint32_t remaining_size, bool is_single) {
@@ -1294,10 +1250,8 @@ uint16_t APIConnection::try_send_alarm_control_panel_info(EntityBase *entity, AP
   msg.supported_features = a_alarm_control_panel->get_supported_features();
   msg.requires_code = a_alarm_control_panel->get_requires_code();
   msg.requires_code_to_arm = a_alarm_control_panel->get_requires_code_to_arm();
-  msg.unique_id = get_default_unique_id("alarm_control_panel", a_alarm_control_panel);
-  fill_entity_info_base(a_alarm_control_panel, msg);
-  return encode_message_to_buffer(msg, ListEntitiesAlarmControlPanelResponse::MESSAGE_TYPE, conn, remaining_size,
-                                  is_single);
+  return fill_and_encode_entity_info(a_alarm_control_panel, msg, ListEntitiesAlarmControlPanelResponse::MESSAGE_TYPE,
+                                     conn, remaining_size, is_single);
 }
 void APIConnection::alarm_control_panel_command(const AlarmControlPanelCommandRequest &msg) {
   ENTITY_COMMAND_MAKE_CALL(alarm_control_panel::AlarmControlPanel, a_alarm_control_panel, alarm_control_panel)
@@ -1338,8 +1292,7 @@ uint16_t APIConnection::try_send_event_response(event::Event *event, const std::
                                                 uint32_t remaining_size, bool is_single) {
   EventResponse resp;
   resp.event_type = event_type;
-  fill_entity_state_base(event, resp);
-  return encode_message_to_buffer(resp, EventResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(event, resp, EventResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }
 
 uint16_t APIConnection::try_send_event_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
@@ -1349,9 +1302,8 @@ uint16_t APIConnection::try_send_event_info(EntityBase *entity, APIConnection *c
   msg.device_class = event->get_device_class();
   for (const auto &event_type : event->get_event_types())
     msg.event_types.push_back(event_type);
-  msg.unique_id = get_default_unique_id("event", event);
-  fill_entity_info_base(event, msg);
-  return encode_message_to_buffer(msg, ListEntitiesEventResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(event, msg, ListEntitiesEventResponse::MESSAGE_TYPE, conn, remaining_size,
+                                     is_single);
 }
 #endif
 
@@ -1377,17 +1329,15 @@ uint16_t APIConnection::try_send_update_state(EntityBase *entity, APIConnection
     resp.release_summary = update->update_info.summary;
     resp.release_url = update->update_info.release_url;
   }
-  fill_entity_state_base(update, resp);
-  return encode_message_to_buffer(resp, UpdateStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_state(update, resp, UpdateStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }
 uint16_t APIConnection::try_send_update_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
                                              bool is_single) {
   auto *update = static_cast<update::UpdateEntity *>(entity);
   ListEntitiesUpdateResponse msg;
   msg.device_class = update->get_device_class();
-  msg.unique_id = get_default_unique_id("update", update);
-  fill_entity_info_base(update, msg);
-  return encode_message_to_buffer(msg, ListEntitiesUpdateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+  return fill_and_encode_entity_info(update, msg, ListEntitiesUpdateResponse::MESSAGE_TYPE, conn, remaining_size,
+                                     is_single);
 }
 void APIConnection::update_command(const UpdateCommandRequest &msg) {
   ENTITY_COMMAND_GET(update::UpdateEntity, update, update)
@@ -1410,9 +1360,6 @@ void APIConnection::update_command(const UpdateCommandRequest &msg) {
 #endif
 
 bool APIConnection::try_send_log_message(int level, const char *tag, const char *line, size_t message_len) {
-  if (this->flags_.log_subscription < level)
-    return false;
-
   // Pre-calculate message size to avoid reallocations
   uint32_t msg_size = 0;
 
@@ -1435,6 +1382,24 @@ bool APIConnection::try_send_log_message(int level, const char *tag, const char
   return this->send_buffer(buffer, SubscribeLogsResponse::MESSAGE_TYPE);
 }
 
+void APIConnection::complete_authentication_() {
+  // Early return if already authenticated
+  if (this->flags_.connection_state == static_cast<uint8_t>(ConnectionState::AUTHENTICATED)) {
+    return;
+  }
+
+  this->flags_.connection_state = static_cast<uint8_t>(ConnectionState::AUTHENTICATED);
+  ESP_LOGD(TAG, "%s connected", this->get_client_combined_info().c_str());
+#ifdef USE_API_CLIENT_CONNECTED_TRIGGER
+  this->parent_->get_client_connected_trigger()->trigger(this->client_info_, this->client_peername_);
+#endif
+#ifdef USE_HOMEASSISTANT_TIME
+  if (homeassistant::global_homeassistant_time != nullptr) {
+    this->send_time_request();
+  }
+#endif
+}
+
 HelloResponse APIConnection::hello(const HelloRequest &msg) {
   this->client_info_ = msg.client_info;
   this->client_peername_ = this->helper_->getpeername();
@@ -1450,7 +1415,14 @@ HelloResponse APIConnection::hello(const HelloRequest &msg) {
   resp.server_info = App.get_name() + " (esphome v" ESPHOME_VERSION ")";
   resp.name = App.get_name();
 
+#ifdef USE_API_PASSWORD
+  // Password required - wait for authentication
   this->flags_.connection_state = static_cast<uint8_t>(ConnectionState::CONNECTED);
+#else
+  // No password configured - auto-authenticate
+  this->complete_authentication_();
+#endif
+
   return resp;
 }
 ConnectResponse APIConnection::connect(const ConnectRequest &msg) {
@@ -1463,29 +1435,22 @@ ConnectResponse APIConnection::connect(const ConnectRequest &msg) {
   // bool invalid_password = 1;
   resp.invalid_password = !correct;
   if (correct) {
-    ESP_LOGD(TAG, "%s connected", this->get_client_combined_info().c_str());
-    this->flags_.connection_state = static_cast<uint8_t>(ConnectionState::AUTHENTICATED);
-#ifdef USE_API_CLIENT_CONNECTED_TRIGGER
-    this->parent_->get_client_connected_trigger()->trigger(this->client_info_, this->client_peername_);
-#endif
-#ifdef USE_HOMEASSISTANT_TIME
-    if (homeassistant::global_homeassistant_time != nullptr) {
-      this->send_time_request();
-    }
-#endif
+    this->complete_authentication_();
   }
   return resp;
 }
 DeviceInfoResponse APIConnection::device_info(const DeviceInfoRequest &msg) {
   DeviceInfoResponse resp{};
 #ifdef USE_API_PASSWORD
-  resp.uses_password = this->parent_->uses_password();
+  resp.uses_password = true;
 #else
   resp.uses_password = false;
 #endif
   resp.name = App.get_name();
   resp.friendly_name = App.get_friendly_name();
+#ifdef USE_AREAS
   resp.suggested_area = App.get_area();
+#endif
   resp.mac_address = get_mac_address_pretty();
   resp.esphome_version = ESPHOME_VERSION;
   resp.compilation_time = App.get_compilation_time();
@@ -1551,8 +1516,8 @@ void APIConnection::on_home_assistant_state_response(const HomeAssistantStateRes
     }
   }
 }
+#ifdef USE_API_SERVICES
 void APIConnection::execute_service(const ExecuteServiceRequest &msg) {
-  ESP_LOGD(TAG, "execute_service called with key: %u, args count: %zu", msg.key, msg.args.size());
   bool found = false;
   for (auto *service : this->parent_->get_user_services()) {
     if (service->execute_service(msg)) {
@@ -1563,6 +1528,7 @@ void APIConnection::execute_service(const ExecuteServiceRequest &msg) {
     ESP_LOGV(TAG, "Could not find service");
   }
 }
+#endif
 #ifdef USE_API_NOISE
 NoiseEncryptionSetKeyResponse APIConnection::noise_encryption_set_key(const NoiseEncryptionSetKeyRequest &msg) {
   psk_t psk{};
@@ -1595,7 +1561,7 @@ bool APIConnection::try_to_clear_buffer(bool log_out_of_space) {
   APIError err = this->helper_->loop();
   if (err != APIError::OK) {
     on_fatal_error();
-    ESP_LOGW(TAG, "%s: Socket operation failed: %s errno=%d", this->get_client_combined_info().c_str(),
+    ESP_LOGW(TAG, "%s: Socket operation failed %s errno=%d", this->get_client_combined_info().c_str(),
              api_error_to_str(err), errno);
     return false;
   }
@@ -1616,12 +1582,8 @@ bool APIConnection::send_buffer(ProtoWriteBuffer buffer, uint8_t message_type) {
     return false;
   if (err != APIError::OK) {
     on_fatal_error();
-    if (err == APIError::SOCKET_WRITE_FAILED && errno == ECONNRESET) {
-      ESP_LOGW(TAG, "%s: Connection reset", this->get_client_combined_info().c_str());
-    } else {
-      ESP_LOGW(TAG, "%s: Packet write failed %s errno=%d", this->get_client_combined_info().c_str(),
-               api_error_to_str(err), errno);
-    }
+    ESP_LOGW(TAG, "%s: Packet write failed %s errno=%d", this->get_client_combined_info().c_str(),
+             api_error_to_str(err), errno);
     return false;
   }
   // Do not set last_traffic_ on send
@@ -1629,11 +1591,11 @@ bool APIConnection::send_buffer(ProtoWriteBuffer buffer, uint8_t message_type) {
 }
 void APIConnection::on_unauthenticated_access() {
   this->on_fatal_error();
-  ESP_LOGD(TAG, "%s requested access without authentication", this->get_client_combined_info().c_str());
+  ESP_LOGD(TAG, "%s access without authentication", this->get_client_combined_info().c_str());
 }
 void APIConnection::on_no_setup_connection() {
   this->on_fatal_error();
-  ESP_LOGD(TAG, "%s requested access without full connection", this->get_client_combined_info().c_str());
+  ESP_LOGD(TAG, "%s access without full connection", this->get_client_combined_info().c_str());
 }
 void APIConnection::on_fatal_error() {
   this->helper_->close();
@@ -1651,7 +1613,6 @@ void APIConnection::DeferredBatch::add_item(EntityBase *entity, MessageCreator c
       item.creator.cleanup(message_type);
       // Move assign the new creator
       item.creator = std::move(creator);
-      item.estimated_size = estimated_size;  // Update estimated size too
       return;
     }
   }
@@ -1662,8 +1623,15 @@ void APIConnection::DeferredBatch::add_item(EntityBase *entity, MessageCreator c
 
 void APIConnection::DeferredBatch::add_item_front(EntityBase *entity, MessageCreator creator, uint8_t message_type,
                                                   uint8_t estimated_size) {
-  // Insert at front for high priority messages (no deduplication check)
-  items.insert(items.begin(), BatchItem(entity, std::move(creator), message_type, estimated_size));
+  // Add high priority message and swap to front
+  // This avoids expensive vector::insert which shifts all elements
+  // Note: We only ever have one high-priority message at a time (ping OR disconnect)
+  // If we're disconnecting, pings are blocked, so this simple swap is sufficient
+  items.emplace_back(entity, std::move(creator), message_type, estimated_size);
+  if (items.size() > 1) {
+    // Swap the new high-priority item to the front
+    std::swap(items.front(), items.back());
+  }
 }
 
 bool APIConnection::schedule_batch_() {
@@ -1731,7 +1699,7 @@ void APIConnection::process_batch_() {
   // Initialize buffer and tracking variables
   this->parent_->get_shared_buffer_ref().clear();
 
-  // Pre-calculate exact buffer size needed based on stored estimated sizes
+  // Pre-calculate exact buffer size needed based on message types
   uint32_t total_estimated_size = 0;
   for (size_t i = 0; i < this->deferred_batch_.size(); i++) {
     const auto &item = this->deferred_batch_[i];
@@ -1773,9 +1741,9 @@ void APIConnection::process_batch_() {
 
     // Update tracking variables
     items_processed++;
-    // After first message, set remaining size to MAX_PACKET_SIZE to avoid fragmentation
+    // After first message, set remaining size to MAX_BATCH_PACKET_SIZE to avoid fragmentation
     if (items_processed == 1) {
-      remaining_size = MAX_PACKET_SIZE;
+      remaining_size = MAX_BATCH_PACKET_SIZE;
     }
     remaining_size -= payload_size;
     // Calculate where the next message's header padding will start
@@ -1799,12 +1767,8 @@ void APIConnection::process_batch_() {
       this->helper_->write_protobuf_packets(ProtoWriteBuffer{&this->parent_->get_shared_buffer_ref()}, packet_info);
   if (err != APIError::OK && err != APIError::WOULD_BLOCK) {
     on_fatal_error();
-    if (err == APIError::SOCKET_WRITE_FAILED && errno == ECONNRESET) {
-      ESP_LOGW(TAG, "%s: Connection reset during batch write", this->get_client_combined_info().c_str());
-    } else {
-      ESP_LOGW(TAG, "%s: Batch write failed %s errno=%d", this->get_client_combined_info().c_str(),
-               api_error_to_str(err), errno);
-    }
+    ESP_LOGW(TAG, "%s: Batch write failed %s errno=%d", this->get_client_combined_info().c_str(), api_error_to_str(err),
+             errno);
   }
 
 #ifdef HAS_PROTO_MESSAGE_DUMP

esphome/components/api/api_connection.h

@@ -195,7 +195,9 @@ class APIConnection : public APIServerConnection {
     // TODO
     return {};
   }
+#ifdef USE_API_SERVICES
   void execute_service(const ExecuteServiceRequest &msg) override;
+#endif
 #ifdef USE_API_NOISE
   NoiseEncryptionSetKeyResponse noise_encryption_set_key(const NoiseEncryptionSetKeyRequest &msg) override;
 #endif
@@ -207,6 +209,7 @@ class APIConnection : public APIServerConnection {
     return static_cast<ConnectionState>(this->flags_.connection_state) == ConnectionState::CONNECTED ||
            this->is_authenticated();
   }
+  uint8_t get_log_subscription_level() const { return this->flags_.log_subscription; }
   void on_fatal_error() override;
   void on_unauthenticated_access() override;
   void on_no_setup_connection() override;
@@ -271,36 +274,45 @@ class APIConnection : public APIServerConnection {
   ProtoWriteBuffer allocate_batch_message_buffer(uint16_t size);
 
  protected:
-  // Helper function to fill common entity info fields
-  static void fill_entity_info_base(esphome::EntityBase *entity, InfoResponseProtoMessage &response) {
-    // Set common fields that are shared by all entity types
-    response.key = entity->get_object_id_hash();
-    response.object_id = entity->get_object_id();
-
-    if (entity->has_own_name())
-      response.name = entity->get_name();
-
-    // Set common EntityBase properties
-    response.icon = entity->get_icon();
-    response.disabled_by_default = entity->is_disabled_by_default();
-    response.entity_category = static_cast<enums::EntityCategory>(entity->get_entity_category());
-#ifdef USE_DEVICES
-    response.device_id = entity->get_device_id();
-#endif
-  }
-
-  // Helper function to fill common entity state fields
-  static void fill_entity_state_base(esphome::EntityBase *entity, StateResponseProtoMessage &response) {
-    response.key = entity->get_object_id_hash();
-#ifdef USE_DEVICES
-    response.device_id = entity->get_device_id();
-#endif
-  }
+  // Helper function to handle authentication completion
+  void complete_authentication_();
 
   // Non-template helper to encode any ProtoMessage
   static uint16_t encode_message_to_buffer(ProtoMessage &msg, uint8_t message_type, APIConnection *conn,
                                            uint32_t remaining_size, bool is_single);
 
+  // Helper to fill entity state base and encode message
+  static uint16_t fill_and_encode_entity_state(EntityBase *entity, StateResponseProtoMessage &msg, uint8_t message_type,
+                                               APIConnection *conn, uint32_t remaining_size, bool is_single) {
+    msg.key = entity->get_object_id_hash();
+#ifdef USE_DEVICES
+    msg.device_id = entity->get_device_id();
+#endif
+    return encode_message_to_buffer(msg, message_type, conn, remaining_size, is_single);
+  }
+
+  // Helper to fill entity info base and encode message
+  static uint16_t fill_and_encode_entity_info(EntityBase *entity, InfoResponseProtoMessage &msg, uint8_t message_type,
+                                              APIConnection *conn, uint32_t remaining_size, bool is_single) {
+    // Set common fields that are shared by all entity types
+    msg.key = entity->get_object_id_hash();
+    msg.object_id = entity->get_object_id();
+
+    if (entity->has_own_name())
+      msg.name = entity->get_name();
+
+      // Set common EntityBase properties
+#ifdef USE_ENTITY_ICON
+    msg.icon = entity->get_icon();
+#endif
+    msg.disabled_by_default = entity->is_disabled_by_default();
+    msg.entity_category = static_cast<enums::EntityCategory>(entity->get_entity_category());
+#ifdef USE_DEVICES
+    msg.device_id = entity->get_device_id();
+#endif
+    return encode_message_to_buffer(msg, message_type, conn, remaining_size, is_single);
+  }
+
 #ifdef USE_VOICE_ASSISTANT
   // Helper to check voice assistant validity and connection ownership
   inline bool check_voice_assistant_api_connection_() const;
@@ -628,7 +640,7 @@ class APIConnection : public APIServerConnection {
   // to send in one go. This is the maximum size of a single packet
   // that can be sent over the network.
   // This is to avoid fragmentation of the packet.
-  static constexpr size_t MAX_PACKET_SIZE = 1390;  // MTU
+  static constexpr size_t MAX_BATCH_PACKET_SIZE = 1390;  // MTU
 
   bool schedule_batch_();
   void process_batch_();
@@ -641,7 +653,7 @@ class APIConnection : public APIServerConnection {
   // Helper to log a proto message from a MessageCreator object
   void log_proto_message_(EntityBase *entity, const MessageCreator &creator, uint8_t message_type) {
     this->flags_.log_only_mode = true;
-    creator(entity, this, MAX_PACKET_SIZE, true, message_type);
+    creator(entity, this, MAX_BATCH_PACKET_SIZE, true, message_type);
     this->flags_.log_only_mode = false;
   }
 
@@ -661,7 +673,7 @@ class APIConnection : public APIServerConnection {
     if (this->flags_.should_try_send_immediately && this->get_batch_delay_ms_() == 0 &&
         this->helper_->can_write_without_blocking()) {
       // Now actually encode and send
-      if (creator(entity, this, MAX_PACKET_SIZE, true) &&
+      if (creator(entity, this, MAX_BATCH_PACKET_SIZE, true) &&
           this->send_buffer(ProtoWriteBuffer{&this->parent_->get_shared_buffer_ref()}, message_type)) {
 #ifdef HAS_PROTO_MESSAGE_DUMP
         // Log the message in verbose mode

esphome/components/api/api_frame_helper.cpp

@@ -5,7 +5,6 @@
 #include "esphome/core/helpers.h"
 #include "esphome/core/log.h"
 #include "proto.h"
-#include "api_pb2_size.h"
 #include <cstring>
 #include <cinttypes>
 
@@ -613,7 +612,7 @@ APIError APINoiseFrameHelper::read_packet(ReadPacketBuffer *buffer) {
   buffer->type = type;
   return APIError::OK;
 }
-APIError APINoiseFrameHelper::write_protobuf_packet(uint16_t type, ProtoWriteBuffer buffer) {
+APIError APINoiseFrameHelper::write_protobuf_packet(uint8_t type, ProtoWriteBuffer buffer) {
   // Resize to include MAC space (required for Noise encryption)
   buffer.get_buffer()->resize(buffer.get_buffer()->size() + frame_footer_size_);
   PacketInfo packet{type, 0,
@@ -1002,7 +1001,7 @@ APIError APIPlaintextFrameHelper::read_packet(ReadPacketBuffer *buffer) {
   buffer->type = rx_header_parsed_type_;
   return APIError::OK;
 }
-APIError APIPlaintextFrameHelper::write_protobuf_packet(uint16_t type, ProtoWriteBuffer buffer) {
+APIError APIPlaintextFrameHelper::write_protobuf_packet(uint8_t type, ProtoWriteBuffer buffer) {
   PacketInfo packet{type, 0, static_cast<uint16_t>(buffer.get_buffer()->size() - frame_header_padding_)};
   return write_protobuf_packets(buffer, std::span<const PacketInfo>(&packet, 1));
 }

esphome/components/api/api_frame_helper.h

@@ -30,13 +30,11 @@ struct ReadPacketBuffer {
 
 // Packed packet info structure to minimize memory usage
 struct PacketInfo {
-  uint16_t message_type;  // 2 bytes
-  uint16_t offset;        // 2 bytes (sufficient for packet size ~1460 bytes)
-  uint16_t payload_size;  // 2 bytes (up to 65535 bytes)
-  uint16_t padding;       // 2 byte (for alignment)
+  uint16_t offset;        // Offset in buffer where message starts
+  uint16_t payload_size;  // Size of the message payload
+  uint8_t message_type;   // Message type (0-255)
 
-  PacketInfo(uint16_t type, uint16_t off, uint16_t size)
-      : message_type(type), offset(off), payload_size(size), padding(0) {}
+  PacketInfo(uint8_t type, uint16_t off, uint16_t size) : offset(off), payload_size(size), message_type(type) {}
 };
 
 enum class APIError : uint16_t {
@@ -98,7 +96,7 @@ class APIFrameHelper {
   }
   // Give this helper a name for logging
   void set_log_info(std::string info) { info_ = std::move(info); }
-  virtual APIError write_protobuf_packet(uint16_t type, ProtoWriteBuffer buffer) = 0;
+  virtual APIError write_protobuf_packet(uint8_t type, ProtoWriteBuffer buffer) = 0;
   // Write multiple protobuf packets in a single operation
   // packets contains (message_type, offset, length) for each message in the buffer
   // The buffer contains all messages with appropriate padding before each
@@ -197,7 +195,7 @@ class APINoiseFrameHelper : public APIFrameHelper {
   APIError init() override;
   APIError loop() override;
   APIError read_packet(ReadPacketBuffer *buffer) override;
-  APIError write_protobuf_packet(uint16_t type, ProtoWriteBuffer buffer) override;
+  APIError write_protobuf_packet(uint8_t type, ProtoWriteBuffer buffer) override;
   APIError write_protobuf_packets(ProtoWriteBuffer buffer, std::span<const PacketInfo> packets) override;
   // Get the frame header padding required by this protocol
   uint8_t frame_header_padding() override { return frame_header_padding_; }
@@ -251,7 +249,7 @@ class APIPlaintextFrameHelper : public APIFrameHelper {
   APIError init() override;
   APIError loop() override;
   APIError read_packet(ReadPacketBuffer *buffer) override;
-  APIError write_protobuf_packet(uint16_t type, ProtoWriteBuffer buffer) override;
+  APIError write_protobuf_packet(uint8_t type, ProtoWriteBuffer buffer) override;
   APIError write_protobuf_packets(ProtoWriteBuffer buffer, std::span<const PacketInfo> packets) override;
   uint8_t frame_header_padding() override { return frame_header_padding_; }
   // Get the frame footer size required by this protocol

esphome/components/api/api_options.proto

@@ -23,3 +23,7 @@ extend google.protobuf.MessageOptions {
     optional bool no_delay = 1040 [default=false];
     optional string base_class = 1041;
 }
+
+extend google.protobuf.FieldOptions {
+    optional string field_ifdef = 1042;
+}

esphome/components/api/api_pb2_service.cpp

@@ -195,6 +195,7 @@ void APIServerConnectionBase::read_message(uint32_t msg_size, uint32_t msg_type,
       this->on_home_assistant_state_response(msg);
       break;
     }
+#ifdef USE_API_SERVICES
     case 42: {
       ExecuteServiceRequest msg;
       msg.decode(msg_data, msg_size);
@@ -204,6 +205,7 @@ void APIServerConnectionBase::read_message(uint32_t msg_size, uint32_t msg_type,
       this->on_execute_service_request(msg);
       break;
     }
+#endif
 #ifdef USE_CAMERA
     case 45: {
       CameraImageRequest msg;
@@ -660,11 +662,13 @@ void APIServerConnection::on_get_time_request(const GetTimeRequest &msg) {
     }
   }
 }
+#ifdef USE_API_SERVICES
 void APIServerConnection::on_execute_service_request(const ExecuteServiceRequest &msg) {
   if (this->check_authenticated_()) {
     this->execute_service(msg);
   }
 }
+#endif
 #ifdef USE_API_NOISE
 void APIServerConnection::on_noise_encryption_set_key_request(const NoiseEncryptionSetKeyRequest &msg) {
   if (this->check_authenticated_()) {

esphome/components/api/api_pb2_service.h

@@ -69,7 +69,9 @@ class APIServerConnectionBase : public ProtoService {
   virtual void on_get_time_request(const GetTimeRequest &value){};
   virtual void on_get_time_response(const GetTimeResponse &value){};
 
+#ifdef USE_API_SERVICES
   virtual void on_execute_service_request(const ExecuteServiceRequest &value){};
+#endif
 
 #ifdef USE_CAMERA
   virtual void on_camera_image_request(const CameraImageRequest &value){};
@@ -216,7 +218,9 @@ class APIServerConnection : public APIServerConnectionBase {
   virtual void subscribe_homeassistant_services(const SubscribeHomeassistantServicesRequest &msg) = 0;
   virtual void subscribe_home_assistant_states(const SubscribeHomeAssistantStatesRequest &msg) = 0;
   virtual GetTimeResponse get_time(const GetTimeRequest &msg) = 0;
+#ifdef USE_API_SERVICES
   virtual void execute_service(const ExecuteServiceRequest &msg) = 0;
+#endif
 #ifdef USE_API_NOISE
   virtual NoiseEncryptionSetKeyResponse noise_encryption_set_key(const NoiseEncryptionSetKeyRequest &msg) = 0;
 #endif
@@ -333,7 +337,9 @@ class APIServerConnection : public APIServerConnectionBase {
   void on_subscribe_homeassistant_services_request(const SubscribeHomeassistantServicesRequest &msg) override;
   void on_subscribe_home_assistant_states_request(const SubscribeHomeAssistantStatesRequest &msg) override;
   void on_get_time_request(const GetTimeRequest &msg) override;
+#ifdef USE_API_SERVICES
   void on_execute_service_request(const ExecuteServiceRequest &msg) override;
+#endif
 #ifdef USE_API_NOISE
   void on_noise_encryption_set_key_request(const NoiseEncryptionSetKeyRequest &msg) override;
 #endif

esphome/components/api/api_pb2_size.h

@@ -1,365 +0,0 @@
-#pragma once
-
-#include "proto.h"
-#include <cstdint>
-#include <string>
-
-namespace esphome {
-namespace api {
-
-class ProtoSize {
- public:
-  /**
-   * @brief ProtoSize class for Protocol Buffer serialization size calculation
-   *
-   * This class provides static methods to calculate the exact byte counts needed
-   * for encoding various Protocol Buffer field types. All methods are designed to be
-   * efficient for the common case where many fields have default values.
-   *
-   * Implements Protocol Buffer encoding size calculation according to:
-   * https://protobuf.dev/programming-guides/encoding/
-   *
-   * Key features:
-   * - Early-return optimization for zero/default values
-   * - Direct total_size updates to avoid unnecessary additions
-   * - Specialized handling for different field types according to protobuf spec
-   * - Templated helpers for repeated fields and messages
-   */
-
-  /**
-   * @brief Calculates the size in bytes needed to encode a uint32_t value as a varint
-   *
-   * @param value The uint32_t value to calculate size for
-   * @return The number of bytes needed to encode the value
-   */
-  static inline uint32_t varint(uint32_t value) {
-    // Optimized varint size calculation using leading zeros
-    // Each 7 bits requires one byte in the varint encoding
-    if (value < 128)
-      return 1;  // 7 bits, common case for small values
-
-    // For larger values, count bytes needed based on the position of the highest bit set
-    if (value < 16384) {
-      return 2;  // 14 bits
-    } else if (value < 2097152) {
-      return 3;  // 21 bits
-    } else if (value < 268435456) {
-      return 4;  // 28 bits
-    } else {
-      return 5;  // 32 bits (maximum for uint32_t)
-    }
-  }
-
-  /**
-   * @brief Calculates the size in bytes needed to encode a uint64_t value as a varint
-   *
-   * @param value The uint64_t value to calculate size for
-   * @return The number of bytes needed to encode the value
-   */
-  static inline uint32_t varint(uint64_t value) {
-    // Handle common case of values fitting in uint32_t (vast majority of use cases)
-    if (value <= UINT32_MAX) {
-      return varint(static_cast<uint32_t>(value));
-    }
-
-    // For larger values, determine size based on highest bit position
-    if (value < (1ULL << 35)) {
-      return 5;  // 35 bits
-    } else if (value < (1ULL << 42)) {
-      return 6;  // 42 bits
-    } else if (value < (1ULL << 49)) {
-      return 7;  // 49 bits
-    } else if (value < (1ULL << 56)) {
-      return 8;  // 56 bits
-    } else if (value < (1ULL << 63)) {
-      return 9;  // 63 bits
-    } else {
-      return 10;  // 64 bits (maximum for uint64_t)
-    }
-  }
-
-  /**
-   * @brief Calculates the size in bytes needed to encode an int32_t value as a varint
-   *
-   * Special handling is needed for negative values, which are sign-extended to 64 bits
-   * in Protocol Buffers, resulting in a 10-byte varint.
-   *
-   * @param value The int32_t value to calculate size for
-   * @return The number of bytes needed to encode the value
-   */
-  static inline uint32_t varint(int32_t value) {
-    // Negative values are sign-extended to 64 bits in protocol buffers,
-    // which always results in a 10-byte varint for negative int32
-    if (value < 0) {
-      return 10;  // Negative int32 is always 10 bytes long
-    }
-    // For non-negative values, use the uint32_t implementation
-    return varint(static_cast<uint32_t>(value));
-  }
-
-  /**
-   * @brief Calculates the size in bytes needed to encode an int64_t value as a varint
-   *
-   * @param value The int64_t value to calculate size for
-   * @return The number of bytes needed to encode the value
-   */
-  static inline uint32_t varint(int64_t value) {
-    // For int64_t, we convert to uint64_t and calculate the size
-    // This works because the bit pattern determines the encoding size,
-    // and we've handled negative int32 values as a special case above
-    return varint(static_cast<uint64_t>(value));
-  }
-
-  /**
-   * @brief Calculates the size in bytes needed to encode a field ID and wire type
-   *
-   * @param field_id The field identifier
-   * @param type The wire type value (from the WireType enum in the protobuf spec)
-   * @return The number of bytes needed to encode the field ID and wire type
-   */
-  static inline uint32_t field(uint32_t field_id, uint32_t type) {
-    uint32_t tag = (field_id << 3) | (type & 0b111);
-    return varint(tag);
-  }
-
-  /**
-   * @brief Common parameters for all add_*_field methods
-   *
-   * All add_*_field methods follow these common patterns:
-   *
-   * @param total_size Reference to the total message size to update
-   * @param precalced_field_id_size Pre-calculated size of the field ID in bytes
-   * @param value The value to calculate size for (type varies)
-   * @param force Whether to calculate size even if the value is default/zero/empty
-   *
-   * Each method follows this implementation pattern:
-   * 1. Skip calculation if value is default (0, false, empty) and not forced
-   * 2. Calculate the size based on the field's encoding rules
-   * 3. Add the precalced_field_id_size + calculated value size to total_size
-   */
-
-  /**
-   * @brief Calculates and adds the size of an int32 field to the total message size
-   */
-  static inline void add_int32_field(uint32_t &total_size, uint32_t precalced_field_id_size, int32_t value,
-                                     bool force = false) {
-    // Skip calculation if value is zero and not forced
-    if (value == 0 && !force) {
-      return;  // No need to update total_size
-    }
-
-    // Calculate and directly add to total_size
-    if (value < 0) {
-      // Negative values are encoded as 10-byte varints in protobuf
-      total_size += precalced_field_id_size + 10;
-    } else {
-      // For non-negative values, use the standard varint size
-      total_size += precalced_field_id_size + varint(static_cast<uint32_t>(value));
-    }
-  }
-
-  /**
-   * @brief Calculates and adds the size of a uint32 field to the total message size
-   */
-  static inline void add_uint32_field(uint32_t &total_size, uint32_t precalced_field_id_size, uint32_t value,
-                                      bool force = false) {
-    // Skip calculation if value is zero and not forced
-    if (value == 0 && !force) {
-      return;  // No need to update total_size
-    }
-
-    // Calculate and directly add to total_size
-    total_size += precalced_field_id_size + varint(value);
-  }
-
-  /**
-   * @brief Calculates and adds the size of a boolean field to the total message size
-   */
-  static inline void add_bool_field(uint32_t &total_size, uint32_t precalced_field_id_size, bool value,
-                                    bool force = false) {
-    // Skip calculation if value is false and not forced
-    if (!value && !force) {
-      return;  // No need to update total_size
-    }
-
-    // Boolean fields always use 1 byte when true
-    total_size += precalced_field_id_size + 1;
-  }
-
-  /**
-   * @brief Calculates and adds the size of a fixed field to the total message size
-   *
-   * Fixed fields always take exactly N bytes (4 for fixed32/float, 8 for fixed64/double).
-   *
-   * @tparam NumBytes The number of bytes for this fixed field (4 or 8)
-   * @param is_nonzero Whether the value is non-zero
-   */
-  template<uint32_t NumBytes>
-  static inline void add_fixed_field(uint32_t &total_size, uint32_t precalced_field_id_size, bool is_nonzero,
-                                     bool force = false) {
-    // Skip calculation if value is zero and not forced
-    if (!is_nonzero && !force) {
-      return;  // No need to update total_size
-    }
-
-    // Fixed fields always take exactly NumBytes
-    total_size += precalced_field_id_size + NumBytes;
-  }
-
-  /**
-   * @brief Calculates and adds the size of an enum field to the total message size
-   *
-   * Enum fields are encoded as uint32 varints.
-   */
-  static inline void add_enum_field(uint32_t &total_size, uint32_t precalced_field_id_size, uint32_t value,
-                                    bool force = false) {
-    // Skip calculation if value is zero and not forced
-    if (value == 0 && !force) {
-      return;  // No need to update total_size
-    }
-
-    // Enums are encoded as uint32
-    total_size += precalced_field_id_size + varint(value);
-  }
-
-  /**
-   * @brief Calculates and adds the size of a sint32 field to the total message size
-   *
-   * Sint32 fields use ZigZag encoding, which is more efficient for negative values.
-   */
-  static inline void add_sint32_field(uint32_t &total_size, uint32_t precalced_field_id_size, int32_t value,
-                                      bool force = false) {
-    // Skip calculation if value is zero and not forced
-    if (value == 0 && !force) {
-      return;  // No need to update total_size
-    }
-
-    // ZigZag encoding for sint32: (n << 1) ^ (n >> 31)
-    uint32_t zigzag = (static_cast<uint32_t>(value) << 1) ^ (static_cast<uint32_t>(value >> 31));
-    total_size += precalced_field_id_size + varint(zigzag);
-  }
-
-  /**
-   * @brief Calculates and adds the size of an int64 field to the total message size
-   */
-  static inline void add_int64_field(uint32_t &total_size, uint32_t precalced_field_id_size, int64_t value,
-                                     bool force = false) {
-    // Skip calculation if value is zero and not forced
-    if (value == 0 && !force) {
-      return;  // No need to update total_size
-    }
-
-    // Calculate and directly add to total_size
-    total_size += precalced_field_id_size + varint(value);
-  }
-
-  /**
-   * @brief Calculates and adds the size of a uint64 field to the total message size
-   */
-  static inline void add_uint64_field(uint32_t &total_size, uint32_t precalced_field_id_size, uint64_t value,
-                                      bool force = false) {
-    // Skip calculation if value is zero and not forced
-    if (value == 0 && !force) {
-      return;  // No need to update total_size
-    }
-
-    // Calculate and directly add to total_size
-    total_size += precalced_field_id_size + varint(value);
-  }
-
-  /**
-   * @brief Calculates and adds the size of a sint64 field to the total message size
-   *
-   * Sint64 fields use ZigZag encoding, which is more efficient for negative values.
-   */
-  static inline void add_sint64_field(uint32_t &total_size, uint32_t precalced_field_id_size, int64_t value,
-                                      bool force = false) {
-    // Skip calculation if value is zero and not forced
-    if (value == 0 && !force) {
-      return;  // No need to update total_size
-    }
-
-    // ZigZag encoding for sint64: (n << 1) ^ (n >> 63)
-    uint64_t zigzag = (static_cast<uint64_t>(value) << 1) ^ (static_cast<uint64_t>(value >> 63));
-    total_size += precalced_field_id_size + varint(zigzag);
-  }
-
-  /**
-   * @brief Calculates and adds the size of a string/bytes field to the total message size
-   */
-  static inline void add_string_field(uint32_t &total_size, uint32_t precalced_field_id_size, const std::string &str,
-                                      bool force = false) {
-    // Skip calculation if string is empty and not forced
-    if (str.empty() && !force) {
-      return;  // No need to update total_size
-    }
-
-    // Calculate and directly add to total_size
-    const uint32_t str_size = static_cast<uint32_t>(str.size());
-    total_size += precalced_field_id_size + varint(str_size) + str_size;
-  }
-
-  /**
-   * @brief Calculates and adds the size of a nested message field to the total message size
-   *
-   * This helper function directly updates the total_size reference if the nested size
-   * is greater than zero or force is true.
-   *
-   * @param nested_size The pre-calculated size of the nested message
-   */
-  static inline void add_message_field(uint32_t &total_size, uint32_t precalced_field_id_size, uint32_t nested_size,
-                                       bool force = false) {
-    // Skip calculation if nested message is empty and not forced
-    if (nested_size == 0 && !force) {
-      return;  // No need to update total_size
-    }
-
-    // Calculate and directly add to total_size
-    // Field ID + length varint + nested message content
-    total_size += precalced_field_id_size + varint(nested_size) + nested_size;
-  }
-
-  /**
-   * @brief Calculates and adds the size of a nested message field to the total message size
-   *
-   * This version takes a ProtoMessage object, calculates its size internally,
-   * and updates the total_size reference. This eliminates the need for a temporary variable
-   * at the call site.
-   *
-   * @param message The nested message object
-   */
-  static inline void add_message_object(uint32_t &total_size, uint32_t precalced_field_id_size,
-                                        const ProtoMessage &message, bool force = false) {
-    uint32_t nested_size = 0;
-    message.calculate_size(nested_size);
-
-    // Use the base implementation with the calculated nested_size
-    add_message_field(total_size, precalced_field_id_size, nested_size, force);
-  }
-
-  /**
-   * @brief Calculates and adds the sizes of all messages in a repeated field to the total message size
-   *
-   * This helper processes a vector of message objects, calculating the size for each message
-   * and adding it to the total size.
-   *
-   * @tparam MessageType The type of the nested messages in the vector
-   * @param messages Vector of message objects
-   */
-  template<typename MessageType>
-  static inline void add_repeated_message(uint32_t &total_size, uint32_t precalced_field_id_size,
-                                          const std::vector<MessageType> &messages) {
-    // Skip if the vector is empty
-    if (messages.empty()) {
-      return;
-    }
-
-    // For repeated fields, always use force=true
-    for (const auto &message : messages) {
-      add_message_object(total_size, precalced_field_id_size, message, true);
-    }
-  }
-};
-
-}  // namespace api
-}  // namespace esphome

esphome/components/api/api_server.cpp

@@ -24,14 +24,6 @@ static const char *const TAG = "api";
 // APIServer
 APIServer *global_api_server = nullptr;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
 
-#ifndef USE_API_YAML_SERVICES
-// Global empty vector to avoid guard variables (saves 8 bytes)
-// This is initialized at program startup before any threads
-static const std::vector<UserServiceDescriptor *> empty_user_services{};
-
-const std::vector<UserServiceDescriptor *> &get_empty_user_services_instance() { return empty_user_services; }
-#endif
-
 APIServer::APIServer() {
   global_api_server = this;
   // Pre-allocate shared write buffer
@@ -39,7 +31,6 @@ APIServer::APIServer() {
 }
 
 void APIServer::setup() {
-  ESP_LOGCONFIG(TAG, "Running setup");
   this->setup_controller();
 
 #ifdef USE_API_NOISE
@@ -113,7 +104,7 @@ void APIServer::setup() {
             return;
           }
           for (auto &c : this->clients_) {
-            if (!c->flags_.remove)
+            if (!c->flags_.remove && c->get_log_subscription_level() >= level)
               c->try_send_log_message(level, tag, message, message_len);
           }
         });
@@ -213,22 +204,20 @@ void APIServer::loop() {
 
 void APIServer::dump_config() {
   ESP_LOGCONFIG(TAG,
-                "API Server:\n"
+                "Server:\n"
                 "  Address: %s:%u",
                 network::get_use_address().c_str(), this->port_);
 #ifdef USE_API_NOISE
-  ESP_LOGCONFIG(TAG, "  Using noise encryption: %s", YESNO(this->noise_ctx_->has_psk()));
+  ESP_LOGCONFIG(TAG, "  Noise encryption: %s", YESNO(this->noise_ctx_->has_psk()));
   if (!this->noise_ctx_->has_psk()) {
-    ESP_LOGCONFIG(TAG, "  Supports noise encryption: YES");
+    ESP_LOGCONFIG(TAG, "  Supports encryption: YES");
   }
 #else
-  ESP_LOGCONFIG(TAG, "  Using noise encryption: NO");
+  ESP_LOGCONFIG(TAG, "  Noise encryption: NO");
 #endif
 }
 
 #ifdef USE_API_PASSWORD
-bool APIServer::uses_password() const { return !this->password_.empty(); }
-
 bool APIServer::check_password(const std::string &password) const {
   // depend only on input password length
   const char *a = this->password_.c_str();
@@ -436,7 +425,7 @@ bool APIServer::save_noise_psk(psk_t psk, bool make_active) {
   ESP_LOGD(TAG, "Noise PSK saved");
   if (make_active) {
     this->set_timeout(100, [this, psk]() {
-      ESP_LOGW(TAG, "Disconnecting all clients to reset connections");
+      ESP_LOGW(TAG, "Disconnecting all clients to reset PSK");
       this->set_noise_psk(psk);
       for (auto &c : this->clients_) {
         c->send_message(DisconnectRequest());

esphome/components/api/api_server.h

@@ -12,7 +12,9 @@
 #include "esphome/core/log.h"
 #include "list_entities.h"
 #include "subscribe_state.h"
+#ifdef USE_API_SERVICES
 #include "user_services.h"
+#endif
 
 #include <vector>
 
@@ -25,11 +27,6 @@ struct SavedNoisePsk {
 } PACKED;  // NOLINT
 #endif
 
-#ifndef USE_API_YAML_SERVICES
-// Forward declaration of helper function
-const std::vector<UserServiceDescriptor *> &get_empty_user_services_instance();
-#endif
-
 class APIServer : public Component, public Controller {
  public:
   APIServer();
@@ -42,7 +39,6 @@ class APIServer : public Component, public Controller {
   bool teardown() override;
 #ifdef USE_API_PASSWORD
   bool check_password(const std::string &password) const;
-  bool uses_password() const;
   void set_password(const std::string &password);
 #endif
   void set_port(uint16_t port);
@@ -112,18 +108,9 @@ class APIServer : public Component, public Controller {
   void on_media_player_update(media_player::MediaPlayer *obj) override;
 #endif
   void send_homeassistant_service_call(const HomeassistantServiceResponse &call);
-  void register_user_service(UserServiceDescriptor *descriptor) {
-#ifdef USE_API_YAML_SERVICES
-    // Vector is pre-allocated when services are defined in YAML
-    this->user_services_.push_back(descriptor);
-#else
-    // Lazy allocate vector on first use for CustomAPIDevice
-    if (!this->user_services_) {
-      this->user_services_ = std::make_unique<std::vector<UserServiceDescriptor *>>();
-    }
-    this->user_services_->push_back(descriptor);
+#ifdef USE_API_SERVICES
+  void register_user_service(UserServiceDescriptor *descriptor) { this->user_services_.push_back(descriptor); }
 #endif
-  }
 #ifdef USE_HOMEASSISTANT_TIME
   void request_time();
 #endif
@@ -152,17 +139,9 @@ class APIServer : public Component, public Controller {
   void get_home_assistant_state(std::string entity_id, optional<std::string> attribute,
                                 std::function<void(std::string)> f);
   const std::vector<HomeAssistantStateSubscription> &get_state_subs() const;
-  const std::vector<UserServiceDescriptor *> &get_user_services() const {
-#ifdef USE_API_YAML_SERVICES
-    return this->user_services_;
-#else
-    if (this->user_services_) {
-      return *this->user_services_;
-    }
-    // Return reference to global empty instance (no guard needed)
-    return get_empty_user_services_instance();
+#ifdef USE_API_SERVICES
+  const std::vector<UserServiceDescriptor *> &get_user_services() const { return this->user_services_; }
 #endif
-  }
 
 #ifdef USE_API_CLIENT_CONNECTED_TRIGGER
   Trigger<std::string, std::string> *get_client_connected_trigger() const { return this->client_connected_trigger_; }
@@ -194,14 +173,8 @@ class APIServer : public Component, public Controller {
 #endif
   std::vector<uint8_t> shared_write_buffer_;  // Shared proto write buffer for all connections
   std::vector<HomeAssistantStateSubscription> state_subs_;
-#ifdef USE_API_YAML_SERVICES
-  // When services are defined in YAML, we know at compile time that services will be registered
+#ifdef USE_API_SERVICES
   std::vector<UserServiceDescriptor *> user_services_;
-#else
-  // Services can still be registered at runtime by CustomAPIDevice components even when not
-  // defined in YAML. Using unique_ptr allows lazy allocation, saving 12 bytes in the common
-  // case where no services (YAML or custom) are used.
-  std::unique_ptr<std::vector<UserServiceDescriptor *>> user_services_;
 #endif
 
   // Group smaller types together

esphome/components/api/custom_api_device.h

@@ -3,10 +3,13 @@
 #include <map>
 #include "api_server.h"
 #ifdef USE_API
+#ifdef USE_API_SERVICES
 #include "user_services.h"
+#endif
 namespace esphome {
 namespace api {
 
+#ifdef USE_API_SERVICES
 template<typename T, typename... Ts> class CustomAPIDeviceService : public UserServiceBase<Ts...> {
  public:
   CustomAPIDeviceService(const std::string &name, const std::array<std::string, sizeof...(Ts)> &arg_names, T *obj,
@@ -19,6 +22,7 @@ template<typename T, typename... Ts> class CustomAPIDeviceService : public UserS
   T *obj_;
   void (T::*callback_)(Ts...);
 };
+#endif  // USE_API_SERVICES
 
 class CustomAPIDevice {
  public:
@@ -46,12 +50,14 @@ class CustomAPIDevice {
    * @param name The name of the service to register.
    * @param arg_names The name of the arguments for the service, must match the arguments of the function.
    */
+#ifdef USE_API_SERVICES
   template<typename T, typename... Ts>
   void register_service(void (T::*callback)(Ts...), const std::string &name,
                         const std::array<std::string, sizeof...(Ts)> &arg_names) {
     auto *service = new CustomAPIDeviceService<T, Ts...>(name, arg_names, (T *) this, callback);  // NOLINT
     global_api_server->register_user_service(service);
   }
+#endif
 
   /** Register a custom native API service that will show up in Home Assistant.
    *
@@ -71,10 +77,12 @@ class CustomAPIDevice {
    * @param callback The member function to call when the service is triggered.
    * @param name The name of the arguments for the service, must match the arguments of the function.
    */
+#ifdef USE_API_SERVICES
   template<typename T> void register_service(void (T::*callback)(), const std::string &name) {
     auto *service = new CustomAPIDeviceService<T>(name, {}, (T *) this, callback);  // NOLINT
     global_api_server->register_user_service(service);
   }
+#endif
 
   /** Subscribe to the state (or attribute state) of an entity from Home Assistant.
    *

esphome/components/api/list_entities.cpp

@@ -83,10 +83,12 @@ bool ListEntitiesIterator::on_end() { return this->client_->send_list_info_done(
 
 ListEntitiesIterator::ListEntitiesIterator(APIConnection *client) : client_(client) {}
 
+#ifdef USE_API_SERVICES
 bool ListEntitiesIterator::on_service(UserServiceDescriptor *service) {
   auto resp = service->encode_list_service_response();
   return this->client_->send_message(resp);
 }
+#endif
 
 }  // namespace api
 }  // namespace esphome

esphome/components/api/list_entities.h

@@ -44,7 +44,9 @@ class ListEntitiesIterator : public ComponentIterator {
 #ifdef USE_TEXT_SENSOR
   bool on_text_sensor(text_sensor::TextSensor *entity) override;
 #endif
+#ifdef USE_API_SERVICES
   bool on_service(UserServiceDescriptor *service) override;
+#endif
 #ifdef USE_CAMERA
   bool on_camera(camera::Camera *entity) override;
 #endif

esphome/components/api/proto.cpp

@@ -2,14 +2,84 @@
 #include <cinttypes>
 #include "esphome/core/helpers.h"
 #include "esphome/core/log.h"
-#include "api_pb2_size.h"
 
 namespace esphome {
 namespace api {
 
 static const char *const TAG = "api.proto";
 
-// Message handler registries are defined in api_pb2.cpp
+void ProtoMessage::decode(const uint8_t *buffer, size_t length) {
+  uint32_t i = 0;
+  bool error = false;
+  while (i < length) {
+    uint32_t consumed;
+    auto res = ProtoVarInt::parse(&buffer[i], length - i, &consumed);
+    if (!res.has_value()) {
+      ESP_LOGV(TAG, "Invalid field start at %" PRIu32, i);
+      break;
+    }
+
+    uint32_t field_type = (res->as_uint32()) & 0b111;
+    uint32_t field_id = (res->as_uint32()) >> 3;
+    i += consumed;
+
+    switch (field_type) {
+      case 0: {  // VarInt
+        res = ProtoVarInt::parse(&buffer[i], length - i, &consumed);
+        if (!res.has_value()) {
+          ESP_LOGV(TAG, "Invalid VarInt at %" PRIu32, i);
+          error = true;
+          break;
+        }
+        if (!this->decode_varint(field_id, *res)) {
+          ESP_LOGV(TAG, "Cannot decode VarInt field %" PRIu32 " with value %" PRIu32 "!", field_id, res->as_uint32());
+        }
+        i += consumed;
+        break;
+      }
+      case 2: {  // Length-delimited
+        res = ProtoVarInt::parse(&buffer[i], length - i, &consumed);
+        if (!res.has_value()) {
+          ESP_LOGV(TAG, "Invalid Length Delimited at %" PRIu32, i);
+          error = true;
+          break;
+        }
+        uint32_t field_length = res->as_uint32();
+        i += consumed;
+        if (field_length > length - i) {
+          ESP_LOGV(TAG, "Out-of-bounds Length Delimited at %" PRIu32, i);
+          error = true;
+          break;
+        }
+        if (!this->decode_length(field_id, ProtoLengthDelimited(&buffer[i], field_length))) {
+          ESP_LOGV(TAG, "Cannot decode Length Delimited field %" PRIu32 "!", field_id);
+        }
+        i += field_length;
+        break;
+      }
+      case 5: {  // 32-bit
+        if (length - i < 4) {
+          ESP_LOGV(TAG, "Out-of-bounds Fixed32-bit at %" PRIu32, i);
+          error = true;
+          break;
+        }
+        uint32_t val = encode_uint32(buffer[i + 3], buffer[i + 2], buffer[i + 1], buffer[i]);
+        if (!this->decode_32bit(field_id, Proto32Bit(val))) {
+          ESP_LOGV(TAG, "Cannot decode 32-bit field %" PRIu32 " with value %" PRIu32 "!", field_id, val);
+        }
+        i += 4;
+        break;
+      }
+      default:
+        ESP_LOGV(TAG, "Invalid field type at %" PRIu32, i);
+        error = true;
+        break;
+    }
+    if (error) {
+      break;
+    }
+  }
+}
 
 #ifdef HAS_PROTO_MESSAGE_DUMP
 std::string ProtoMessage::dump() const {
@@ -19,554 +89,5 @@ std::string ProtoMessage::dump() const {
 }
 #endif
 
-// Helper to get vector size for any repeated field type
-static inline size_t get_vector_size(ProtoFieldType type, const void *field_addr) {
-  switch (type) {
-    case ProtoFieldType::TYPE_BOOL:
-      return static_cast<const std::vector<bool> *>(field_addr)->size();
-    case ProtoFieldType::TYPE_INT32:
-    case ProtoFieldType::TYPE_SINT32:
-    case ProtoFieldType::TYPE_SFIXED32:
-      return static_cast<const std::vector<int32_t> *>(field_addr)->size();
-    case ProtoFieldType::TYPE_UINT32:
-    case ProtoFieldType::TYPE_ENUM:
-    case ProtoFieldType::TYPE_FIXED32:
-      return static_cast<const std::vector<uint32_t> *>(field_addr)->size();
-    case ProtoFieldType::TYPE_INT64:
-    case ProtoFieldType::TYPE_SINT64:
-      return static_cast<const std::vector<int64_t> *>(field_addr)->size();
-    case ProtoFieldType::TYPE_UINT64:
-      return static_cast<const std::vector<uint64_t> *>(field_addr)->size();
-    case ProtoFieldType::TYPE_FLOAT:
-      return static_cast<const std::vector<float> *>(field_addr)->size();
-    case ProtoFieldType::TYPE_STRING:
-    case ProtoFieldType::TYPE_BYTES:
-      return static_cast<const std::vector<std::string> *>(field_addr)->size();
-    default:
-      return 0;
-  }
-}
-
-// Helper to get a pointer to the nth element in a vector (const version)
-static inline const void *get_vector_element(ProtoFieldType type, const void *field_addr, size_t index) {
-  switch (type) {
-    case ProtoFieldType::TYPE_BOOL: {
-      // std::vector<bool> is special - we need to handle it differently
-      static bool temp_bool;
-      temp_bool = (*static_cast<const std::vector<bool> *>(field_addr))[index];
-      return &temp_bool;
-    }
-    case ProtoFieldType::TYPE_INT32:
-    case ProtoFieldType::TYPE_SINT32:
-    case ProtoFieldType::TYPE_SFIXED32:
-      return &(*static_cast<const std::vector<int32_t> *>(field_addr))[index];
-    case ProtoFieldType::TYPE_UINT32:
-    case ProtoFieldType::TYPE_ENUM:
-    case ProtoFieldType::TYPE_FIXED32:
-      return &(*static_cast<const std::vector<uint32_t> *>(field_addr))[index];
-    case ProtoFieldType::TYPE_INT64:
-    case ProtoFieldType::TYPE_SINT64:
-      return &(*static_cast<const std::vector<int64_t> *>(field_addr))[index];
-    case ProtoFieldType::TYPE_UINT64:
-      return &(*static_cast<const std::vector<uint64_t> *>(field_addr))[index];
-    case ProtoFieldType::TYPE_FLOAT:
-      return &(*static_cast<const std::vector<float> *>(field_addr))[index];
-    case ProtoFieldType::TYPE_STRING:
-    case ProtoFieldType::TYPE_BYTES:
-      return &(*static_cast<const std::vector<std::string> *>(field_addr))[index];
-    default:
-      return nullptr;
-  }
-}
-
-// Unified encode function that works for both single fields and repeated fields
-static inline void encode_field(ProtoWriteBuffer &buffer, ProtoFieldType type, uint8_t field_num,
-                                const void *field_addr, bool force) {
-  switch (type) {
-    case ProtoFieldType::TYPE_BOOL:
-      buffer.encode_bool(field_num, *static_cast<const bool *>(field_addr), force);
-      break;
-    case ProtoFieldType::TYPE_INT32:
-      buffer.encode_int32(field_num, *static_cast<const int32_t *>(field_addr), force);
-      break;
-    case ProtoFieldType::TYPE_UINT32:
-    case ProtoFieldType::TYPE_ENUM:
-      buffer.encode_uint32(field_num, *static_cast<const uint32_t *>(field_addr), force);
-      break;
-    case ProtoFieldType::TYPE_INT64:
-      buffer.encode_int64(field_num, *static_cast<const int64_t *>(field_addr), force);
-      break;
-    case ProtoFieldType::TYPE_UINT64:
-      buffer.encode_uint64(field_num, *static_cast<const uint64_t *>(field_addr), force);
-      break;
-    case ProtoFieldType::TYPE_SINT32:
-      buffer.encode_sint32(field_num, *static_cast<const int32_t *>(field_addr), force);
-      break;
-    case ProtoFieldType::TYPE_SINT64:
-      buffer.encode_sint64(field_num, *static_cast<const int64_t *>(field_addr), force);
-      break;
-    case ProtoFieldType::TYPE_STRING:
-      buffer.encode_string(field_num, *static_cast<const std::string *>(field_addr), force);
-      break;
-    case ProtoFieldType::TYPE_BYTES: {
-      const auto *str = static_cast<const std::string *>(field_addr);
-      buffer.encode_bytes(field_num, reinterpret_cast<const uint8_t *>(str->data()), str->size(), force);
-      break;
-    }
-    case ProtoFieldType::TYPE_FLOAT:
-      buffer.encode_float(field_num, *static_cast<const float *>(field_addr), force);
-      break;
-    case ProtoFieldType::TYPE_FIXED32:
-      buffer.encode_fixed32(field_num, *static_cast<const uint32_t *>(field_addr), force);
-      break;
-    case ProtoFieldType::TYPE_SFIXED32:
-      buffer.encode_sfixed32(field_num, *static_cast<const int32_t *>(field_addr), force);
-      break;
-    default:
-      break;
-  }
-}
-
-// Unified size calculation
-static inline void calculate_field_size(uint32_t &total_size, ProtoFieldType type, uint8_t precalc_size,
-                                        const void *field_addr, bool force) {
-  switch (type) {
-    case ProtoFieldType::TYPE_BOOL:
-      ProtoSize::add_bool_field(total_size, precalc_size, *static_cast<const bool *>(field_addr), force);
-      break;
-    case ProtoFieldType::TYPE_INT32:
-      ProtoSize::add_int32_field(total_size, precalc_size, *static_cast<const int32_t *>(field_addr), force);
-      break;
-    case ProtoFieldType::TYPE_UINT32:
-    case ProtoFieldType::TYPE_ENUM:
-      ProtoSize::add_uint32_field(total_size, precalc_size, *static_cast<const uint32_t *>(field_addr), force);
-      break;
-    case ProtoFieldType::TYPE_INT64:
-      ProtoSize::add_int64_field(total_size, precalc_size, *static_cast<const int64_t *>(field_addr), force);
-      break;
-    case ProtoFieldType::TYPE_UINT64:
-      ProtoSize::add_uint64_field(total_size, precalc_size, *static_cast<const uint64_t *>(field_addr), force);
-      break;
-    case ProtoFieldType::TYPE_SINT32:
-      ProtoSize::add_sint32_field(total_size, precalc_size, *static_cast<const int32_t *>(field_addr), force);
-      break;
-    case ProtoFieldType::TYPE_SINT64:
-      ProtoSize::add_sint64_field(total_size, precalc_size, *static_cast<const int64_t *>(field_addr), force);
-      break;
-    case ProtoFieldType::TYPE_STRING:
-    case ProtoFieldType::TYPE_BYTES:
-      ProtoSize::add_string_field(total_size, precalc_size, *static_cast<const std::string *>(field_addr), force);
-      break;
-    case ProtoFieldType::TYPE_FLOAT:
-    case ProtoFieldType::TYPE_FIXED32:
-    case ProtoFieldType::TYPE_SFIXED32: {
-      // All 32-bit fixed types use the same size calculation
-      // Check if the 4-byte value is non-zero by treating as uint32_t
-      uint32_t val = *static_cast<const uint32_t *>(field_addr);
-      ProtoSize::add_fixed_field<4>(total_size, precalc_size, val != 0, force);
-      break;
-    }
-    default:
-      break;
-  }
-}
-
-// Decode varint for single fields
-static inline bool decode_varint_field(ProtoFieldType type, void *field_addr, const ProtoVarInt &value) {
-  switch (type) {
-    case ProtoFieldType::TYPE_BOOL:
-      *static_cast<bool *>(field_addr) = value.as_bool();
-      return true;
-    case ProtoFieldType::TYPE_INT32:
-      *static_cast<int32_t *>(field_addr) = value.as_int32();
-      return true;
-    case ProtoFieldType::TYPE_UINT32:
-    case ProtoFieldType::TYPE_ENUM:
-      *static_cast<uint32_t *>(field_addr) = value.as_uint32();
-      return true;
-    case ProtoFieldType::TYPE_INT64:
-      *static_cast<int64_t *>(field_addr) = value.as_int64();
-      return true;
-    case ProtoFieldType::TYPE_UINT64:
-      *static_cast<uint64_t *>(field_addr) = value.as_uint64();
-      return true;
-    case ProtoFieldType::TYPE_SINT32:
-      *static_cast<int32_t *>(field_addr) = value.as_sint32();
-      return true;
-    case ProtoFieldType::TYPE_SINT64:
-      *static_cast<int64_t *>(field_addr) = value.as_sint64();
-      return true;
-    default:
-      return false;
-  }
-}
-
-// Decode varint for repeated fields
-static inline bool decode_repeated_varint_field(ProtoFieldType type, void *field_addr, const ProtoVarInt &value) {
-  switch (type) {
-    case ProtoFieldType::TYPE_BOOL:
-      static_cast<std::vector<bool> *>(field_addr)->push_back(value.as_bool());
-      return true;
-    case ProtoFieldType::TYPE_INT32:
-      static_cast<std::vector<int32_t> *>(field_addr)->push_back(value.as_int32());
-      return true;
-    case ProtoFieldType::TYPE_UINT32:
-    case ProtoFieldType::TYPE_ENUM:
-      static_cast<std::vector<uint32_t> *>(field_addr)->push_back(value.as_uint32());
-      return true;
-    case ProtoFieldType::TYPE_INT64:
-      static_cast<std::vector<int64_t> *>(field_addr)->push_back(value.as_int64());
-      return true;
-    case ProtoFieldType::TYPE_UINT64:
-      static_cast<std::vector<uint64_t> *>(field_addr)->push_back(value.as_uint64());
-      return true;
-    case ProtoFieldType::TYPE_SINT32:
-      static_cast<std::vector<int32_t> *>(field_addr)->push_back(value.as_sint32());
-      return true;
-    case ProtoFieldType::TYPE_SINT64:
-      static_cast<std::vector<int64_t> *>(field_addr)->push_back(value.as_sint64());
-      return true;
-    default:
-      return false;
-  }
-}
-
-// Decode 32-bit for single fields
-static inline bool decode_32bit_field(ProtoFieldType type, void *field_addr, const Proto32Bit &value) {
-  switch (type) {
-    case ProtoFieldType::TYPE_FLOAT:
-      *static_cast<float *>(field_addr) = value.as_float();
-      return true;
-    case ProtoFieldType::TYPE_FIXED32:
-      *static_cast<uint32_t *>(field_addr) = value.as_fixed32();
-      return true;
-    case ProtoFieldType::TYPE_SFIXED32:
-      *static_cast<int32_t *>(field_addr) = value.as_sfixed32();
-      return true;
-    default:
-      return false;
-  }
-}
-
-// Decode 32-bit for repeated fields
-static inline bool decode_repeated_32bit_field(ProtoFieldType type, void *field_addr, const Proto32Bit &value) {
-  switch (type) {
-    case ProtoFieldType::TYPE_FLOAT:
-      static_cast<std::vector<float> *>(field_addr)->push_back(value.as_float());
-      return true;
-    case ProtoFieldType::TYPE_FIXED32:
-      static_cast<std::vector<uint32_t> *>(field_addr)->push_back(value.as_fixed32());
-      return true;
-    case ProtoFieldType::TYPE_SFIXED32:
-      static_cast<std::vector<int32_t> *>(field_addr)->push_back(value.as_sfixed32());
-      return true;
-    default:
-      return false;
-  }
-}
-
-// Decode length-delimited for single fields
-static inline bool decode_length_field(ProtoFieldType type, void *field_addr, const ProtoLengthDelimited &value,
-                                       uint8_t message_type_id) {
-  switch (type) {
-    case ProtoFieldType::TYPE_STRING:
-    case ProtoFieldType::TYPE_BYTES:
-      *static_cast<std::string *>(field_addr) = value.as_string();
-      return true;
-    case ProtoFieldType::TYPE_MESSAGE:
-      if (message_type_id < MESSAGE_HANDLER_COUNT && MESSAGE_HANDLERS[message_type_id].decode != nullptr) {
-        return MESSAGE_HANDLERS[message_type_id].decode(field_addr, value);
-      }
-      return false;
-    default:
-      return false;
-  }
-}
-
-// Decode length-delimited for repeated fields
-static inline bool decode_repeated_length_field(ProtoFieldType type, void *field_addr,
-                                                const ProtoLengthDelimited &value, uint8_t message_type_id) {
-  switch (type) {
-    case ProtoFieldType::TYPE_STRING:
-    case ProtoFieldType::TYPE_BYTES:
-      static_cast<std::vector<std::string> *>(field_addr)->push_back(value.as_string());
-      return true;
-    case ProtoFieldType::TYPE_MESSAGE:
-      if (message_type_id < REPEATED_MESSAGE_HANDLER_COUNT &&
-          REPEATED_MESSAGE_HANDLERS[message_type_id].decode != nullptr) {
-        return REPEATED_MESSAGE_HANDLERS[message_type_id].decode(field_addr, value);
-      }
-      return false;
-    default:
-      return false;
-  }
-}
-
-void ProtoMessage::decode(const uint8_t *buffer, size_t length) {
-  uint8_t *base = reinterpret_cast<uint8_t *>(this);
-
-  // Get metadata
-  const FieldMeta *fields = get_field_metadata();
-  uint8_t field_count = get_field_count();
-  const RepeatedFieldMeta *repeated_fields = get_repeated_field_metadata();
-  uint8_t repeated_count = get_repeated_field_count();
-
-  // Handle empty message
-  if (field_count == 0 && repeated_count == 0) {
-    if (length > 0) {
-      ESP_LOGW(TAG, "Received data for message with no fields");
-    }
-    return;
-  }
-
-  uint32_t i = 0;
-  while (i < length) {
-    // Parse field tag
-    uint32_t consumed;
-    auto tag_res = ProtoVarInt::parse(&buffer[i], length - i, &consumed);
-    if (!tag_res.has_value()) {
-      ESP_LOGV(TAG, "Invalid field tag at position %u", i);
-      break;
-    }
-
-    uint32_t tag = tag_res->as_uint32();
-    uint32_t field_id = tag >> 3;
-    uint32_t wire_type = tag & 0x07;
-    i += consumed;
-
-    bool decoded = false;
-
-    switch (wire_type) {
-      case 0: {  // Varint
-        auto value_res = ProtoVarInt::parse(&buffer[i], length - i, &consumed);
-        if (!value_res.has_value()) {
-          ESP_LOGV(TAG, "Invalid varint at position %u", i);
-          return;
-        }
-        ProtoVarInt value = *value_res;
-
-        // Try regular fields first using binary search
-        if (const FieldMeta *field = find_field_binary(fields, field_count, field_id)) {
-          decoded = decode_varint_field(field->get_type(), base + field->get_offset(), value);
-        }
-
-        // If not found, try repeated fields (linear search - usually only 1-2 fields)
-        if (!decoded) {
-          for (uint8_t j = 0; j < repeated_count; j++) {
-            if (repeated_fields[j].field_num == field_id) {
-              decoded = decode_repeated_varint_field(repeated_fields[j].get_type(),
-                                                     base + repeated_fields[j].get_offset(), value);
-              break;
-            }
-          }
-        }
-
-        i += consumed;
-        break;
-      }
-
-      case 2: {  // Length-delimited
-        auto len_res = ProtoVarInt::parse(&buffer[i], length - i, &consumed);
-        if (!len_res.has_value()) {
-          ESP_LOGV(TAG, "Invalid length at position %u", i);
-          return;
-        }
-        uint32_t field_length = len_res->as_uint32();
-        i += consumed;
-
-        if (i + field_length > length) {
-          ESP_LOGV(TAG, "Length-delimited field exceeds buffer at position %u", i);
-          return;
-        }
-
-        ProtoLengthDelimited value(&buffer[i], field_length);
-
-        // Try regular fields first using binary search
-        if (const FieldMeta *field = find_field_binary(fields, field_count, field_id)) {
-          decoded =
-              decode_length_field(field->get_type(), base + field->get_offset(), value, field->get_message_type_id());
-        }
-
-        // If not found, try repeated fields (linear search - usually only 1-2 fields)
-        if (!decoded) {
-          for (uint8_t j = 0; j < repeated_count; j++) {
-            if (repeated_fields[j].field_num == field_id) {
-              decoded =
-                  decode_repeated_length_field(repeated_fields[j].get_type(), base + repeated_fields[j].get_offset(),
-                                               value, repeated_fields[j].get_message_type_id());
-              break;
-            }
-          }
-        }
-
-        i += field_length;
-        break;
-      }
-
-      case 5: {  // 32-bit
-        if (i + 4 > length) {
-          ESP_LOGV(TAG, "32-bit field exceeds buffer at position %u", i);
-          return;
-        }
-
-        uint32_t raw = 0;
-        raw |= uint32_t(buffer[i]) << 0;
-        raw |= uint32_t(buffer[i + 1]) << 8;
-        raw |= uint32_t(buffer[i + 2]) << 16;
-        raw |= uint32_t(buffer[i + 3]) << 24;
-        Proto32Bit value(raw);
-
-        // Try regular fields first using binary search
-        if (const FieldMeta *field = find_field_binary(fields, field_count, field_id)) {
-          decoded = decode_32bit_field(field->get_type(), base + field->get_offset(), value);
-        }
-
-        // If not found, try repeated fields (linear search - usually only 1-2 fields)
-        if (!decoded) {
-          for (uint8_t j = 0; j < repeated_count; j++) {
-            if (repeated_fields[j].field_num == field_id) {
-              decoded = decode_repeated_32bit_field(repeated_fields[j].get_type(),
-                                                    base + repeated_fields[j].get_offset(), value);
-              break;
-            }
-          }
-        }
-
-        i += 4;
-        break;
-      }
-
-      default:
-        ESP_LOGV(TAG, "Unknown wire type %u at position %u", wire_type, i);
-        return;
-    }
-
-    if (!decoded) {
-      ESP_LOGV(TAG, "Skipping unknown field %u with wire type %u", field_id, wire_type);
-    }
-  }
-}
-
-void ProtoMessage::encode(ProtoWriteBuffer buffer) const {
-  const uint8_t *base = reinterpret_cast<const uint8_t *>(this);
-
-  // Encode regular fields
-  uint8_t field_count = get_field_count();
-  if (field_count) {
-    const FieldMeta *fields = get_field_metadata();
-
-    for (uint8_t i = 0; i < field_count; i++) {
-      const void *field_addr = base + fields[i].get_offset();
-
-      if (fields[i].get_type() == ProtoFieldType::TYPE_MESSAGE) {
-        uint8_t handler_id = fields[i].get_message_type_id();
-        if (handler_id < MESSAGE_HANDLER_COUNT && MESSAGE_HANDLERS[handler_id].encode != nullptr) {
-          MESSAGE_HANDLERS[handler_id].encode(buffer, field_addr, fields[i].field_num);
-        }
-      } else {
-        encode_field(buffer, fields[i].get_type(), fields[i].field_num, field_addr, false);
-      }
-    }
-  }
-
-  // Encode repeated fields - reuse the same encode_field function!
-  uint8_t repeated_count = get_repeated_field_count();
-  if (repeated_count == 0) {
-    return;  // No repeated fields to process
-  }
-  const RepeatedFieldMeta *repeated_fields = get_repeated_field_metadata();
-
-  for (uint8_t i = 0; i < repeated_count; i++) {
-    const void *field_addr = base + repeated_fields[i].get_offset();
-
-    if (repeated_fields[i].get_type() == ProtoFieldType::TYPE_MESSAGE) {
-      uint8_t handler_id = repeated_fields[i].get_message_type_id();
-      if (handler_id < REPEATED_MESSAGE_HANDLER_COUNT && REPEATED_MESSAGE_HANDLERS[handler_id].encode != nullptr) {
-        REPEATED_MESSAGE_HANDLERS[handler_id].encode(buffer, field_addr, repeated_fields[i].field_num);
-      }
-    } else {
-      // Early exit for empty vectors
-      size_t count = get_vector_size(repeated_fields[i].get_type(), field_addr);
-      if (count == 0) {
-        continue;
-      }
-
-      // Iterate through the vector and encode each element using the same function!
-      for (size_t j = 0; j < count; j++) {
-        const void *element = get_vector_element(repeated_fields[i].get_type(), field_addr, j);
-        if (element != nullptr) {
-          encode_field(buffer, repeated_fields[i].get_type(), repeated_fields[i].field_num, element, true);
-        }
-      }
-    }
-  }
-}
-
-void ProtoMessage::calculate_size(uint32_t &total_size) const {
-  const uint8_t *base = reinterpret_cast<const uint8_t *>(this);
-
-  // Calculate size for regular fields
-  uint8_t field_count = get_field_count();
-  if (field_count) {
-    const FieldMeta *fields = get_field_metadata();
-    for (uint8_t i = 0; i < field_count; i++) {
-      const void *field_addr = base + fields[i].get_offset();
-
-      if (fields[i].get_type() == ProtoFieldType::TYPE_MESSAGE) {
-        uint8_t handler_id = fields[i].get_message_type_id();
-        if (handler_id < MESSAGE_HANDLER_COUNT && MESSAGE_HANDLERS[handler_id].size != nullptr) {
-          MESSAGE_HANDLERS[handler_id].size(total_size, field_addr, fields[i].get_precalced_size(), false);
-        }
-      } else {
-        calculate_field_size(total_size, fields[i].get_type(), fields[i].get_precalced_size(), field_addr, false);
-      }
-    }
-  }
-
-  // Calculate size for repeated fields - reuse the same calculate_field_size function!
-  uint8_t repeated_count = get_repeated_field_count();
-  if (repeated_count == 0) {
-    return;  // No repeated fields to process
-  }
-  const RepeatedFieldMeta *repeated_fields = get_repeated_field_metadata();
-
-  for (uint8_t i = 0; i < repeated_count; i++) {
-    const void *field_addr = base + repeated_fields[i].get_offset();
-
-    if (repeated_fields[i].get_type() == ProtoFieldType::TYPE_MESSAGE) {
-      uint8_t handler_id = repeated_fields[i].get_message_type_id();
-      if (handler_id < REPEATED_MESSAGE_HANDLER_COUNT && REPEATED_MESSAGE_HANDLERS[handler_id].size != nullptr) {
-        REPEATED_MESSAGE_HANDLERS[handler_id].size(total_size, field_addr, repeated_fields[i].get_precalced_size());
-      }
-    } else {
-      // Special optimization for fixed-size types
-      ProtoFieldType type = repeated_fields[i].get_type();
-      size_t count = get_vector_size(type, field_addr);
-
-      // Early exit for empty vectors
-      if (count == 0) {
-        continue;
-      }
-
-      // For fixed-size types, we can calculate size more efficiently
-      if (type == ProtoFieldType::TYPE_FIXED32 || type == ProtoFieldType::TYPE_SFIXED32 ||
-          type == ProtoFieldType::TYPE_FLOAT) {
-        total_size += count * (repeated_fields[i].get_precalced_size() + 4);
-      } else if (type == ProtoFieldType::TYPE_BOOL) {
-        // Booleans are always 1 byte when encoded
-        total_size += count * (repeated_fields[i].get_precalced_size() + 1);
-      } else {
-        // For variable-size types, calculate each element
-        for (size_t j = 0; j < count; j++) {
-          const void *element = get_vector_element(type, field_addr, j);
-          if (element != nullptr) {
-            calculate_field_size(total_size, type, repeated_fields[i].get_precalced_size(), element, true);
-          }
-        }
-      }
-    }
-  }
-}
-
 }  // namespace api
 }  // namespace esphome

esphome/components/api/proto.h

@@ -4,6 +4,7 @@
 #include "esphome/core/helpers.h"
 #include "esphome/core/log.h"
 
+#include <cassert>
 #include <vector>
 
 #ifdef ESPHOME_LOG_HAS_VERY_VERBOSE
@@ -13,64 +14,6 @@
 namespace esphome {
 namespace api {
 
-// Forward declarations
-class ProtoWriteBuffer;
-
-// Enum for all supported field types
-enum class ProtoFieldType : uint8_t {
-  // Varint types (wire type 0)
-  TYPE_BOOL = 0,
-  TYPE_INT32 = 1,
-  TYPE_UINT32 = 2,
-  TYPE_INT64 = 3,
-  TYPE_UINT64 = 4,
-  TYPE_SINT32 = 5,
-  TYPE_SINT64 = 6,
-  TYPE_ENUM = 7,
-
-  // Length-delimited types (wire type 2)
-  TYPE_STRING = 8,
-  TYPE_BYTES = 9,
-  TYPE_MESSAGE = 10,
-
-  // 32-bit types (wire type 5)
-  TYPE_FLOAT = 11,
-  TYPE_FIXED32 = 12,
-  TYPE_SFIXED32 = 13,
-};
-
-// Helper to get wire type from field type
-inline constexpr uint8_t get_wire_type(ProtoFieldType type) {
-  switch (type) {
-    case ProtoFieldType::TYPE_BOOL:
-    case ProtoFieldType::TYPE_INT32:
-    case ProtoFieldType::TYPE_UINT32:
-    case ProtoFieldType::TYPE_INT64:
-    case ProtoFieldType::TYPE_UINT64:
-    case ProtoFieldType::TYPE_SINT32:
-    case ProtoFieldType::TYPE_SINT64:
-    case ProtoFieldType::TYPE_ENUM:
-      return 0;  // varint
-
-    case ProtoFieldType::TYPE_STRING:
-    case ProtoFieldType::TYPE_BYTES:
-    case ProtoFieldType::TYPE_MESSAGE:
-      return 2;  // length-delimited
-
-    case ProtoFieldType::TYPE_FLOAT:
-    case ProtoFieldType::TYPE_FIXED32:
-    case ProtoFieldType::TYPE_SFIXED32:
-      return 5;  // 32-bit
-  }
-  return 0;
-}
-
-// Macro to calculate field offset without triggering -Winvalid-offsetof
-// This uses the same approach as offsetof but with explicit reinterpret_cast
-#define PROTO_FIELD_OFFSET(Type, Member) \
-  static_cast<uint16_t>(reinterpret_cast<size_t>(&reinterpret_cast<Type *>(16)->Member) - \
-                        16) /* NOLINT(bugprone-macro-parentheses) */
-
 /// Representation of a VarInt - in ProtoBuf should be 64bit but we only use 32bit
 class ProtoVarInt {
  public:
@@ -113,20 +56,19 @@ class ProtoVarInt {
     return {};  // Incomplete or invalid varint
   }
 
-  inline uint16_t as_uint16() const { return this->value_; }
-  inline uint32_t as_uint32() const { return this->value_; }
-  inline uint64_t as_uint64() const { return this->value_; }
-  inline bool as_bool() const { return this->value_; }
-  template<typename T> inline T as_enum() const { return static_cast<T>(this->as_uint32()); }
-  inline int32_t as_int32() const {
+  uint16_t as_uint16() const { return this->value_; }
+  uint32_t as_uint32() const { return this->value_; }
+  uint64_t as_uint64() const { return this->value_; }
+  bool as_bool() const { return this->value_; }
+  int32_t as_int32() const {
     // Not ZigZag encoded
     return static_cast<int32_t>(this->as_int64());
   }
-  inline int64_t as_int64() const {
+  int64_t as_int64() const {
     // Not ZigZag encoded
     return static_cast<int64_t>(this->value_);
   }
-  inline int32_t as_sint32() const {
+  int32_t as_sint32() const {
     // with ZigZag encoding
     if (this->value_ & 1) {
       return static_cast<int32_t>(~(this->value_ >> 1));
@@ -134,7 +76,7 @@ class ProtoVarInt {
       return static_cast<int32_t>(this->value_ >> 1);
     }
   }
-  inline int64_t as_sint64() const {
+  int64_t as_sint64() const {
     // with ZigZag encoding
     if (this->value_ & 1) {
       return static_cast<int64_t>(~(this->value_ >> 1));
@@ -176,18 +118,6 @@ class ProtoVarInt {
       out.push_back(val);
       return;
     }
-    // Optimize for 2-byte varints (0x80-0x3FFF)
-    if (val <= 0x3FFF) {
-      out.push_back((val & 0x7F) | 0x80);
-      out.push_back(val >> 7);
-      return;
-    }
-    // For 3+ byte varints, write first 2 bytes directly
-    out.push_back((val & 0x7F) | 0x80);
-    out.push_back(((val >> 7) & 0x7F) | 0x80);
-    val >>= 14;
-
-    // Continue with remaining bytes
     while (val) {
       uint8_t temp = val & 0x7F;
       val >>= 7;
@@ -203,17 +133,24 @@ class ProtoVarInt {
   uint64_t value_;
 };
 
+// Forward declaration for decode_to_message and encode_to_writer
+class ProtoMessage;
+
 class ProtoLengthDelimited {
  public:
   explicit ProtoLengthDelimited(const uint8_t *value, size_t length) : value_(value), length_(length) {}
-  inline std::string as_string() const {
-    return std::string(reinterpret_cast<const char *>(this->value_), this->length_);
-  }
-  template<class C> inline C as_message() const {
-    auto msg = C();
-    msg.decode(this->value_, this->length_);
-    return msg;
-  }
+  std::string as_string() const { return std::string(reinterpret_cast<const char *>(this->value_), this->length_); }
+
+  /**
+   * Decode the length-delimited data into an existing ProtoMessage instance.
+   *
+   * This method allows decoding without templates, enabling use in contexts
+   * where the message type is not known at compile time. The ProtoMessage's
+   * decode() method will be called with the raw data and length.
+   *
+   * @param msg The ProtoMessage instance to decode into
+   */
+  void decode_to_message(ProtoMessage &msg) const;
 
  protected:
   const uint8_t *const value_;
@@ -223,9 +160,9 @@ class ProtoLengthDelimited {
 class Proto32Bit {
  public:
   explicit Proto32Bit(uint32_t value) : value_(value) {}
-  inline uint32_t as_fixed32() const { return this->value_; }
-  inline int32_t as_sfixed32() const { return static_cast<int32_t>(this->value_); }
-  inline float as_float() const {
+  uint32_t as_fixed32() const { return this->value_; }
+  int32_t as_sfixed32() const { return static_cast<int32_t>(this->value_); }
+  float as_float() const {
     union {
       uint32_t raw;
       float value;
@@ -238,133 +175,31 @@ class Proto32Bit {
   const uint32_t value_;
 };
 
-// Function pointer types used by V2 structures
-using EncodeFunc = void (*)(ProtoWriteBuffer &, const void *field_ptr, uint8_t field_num);
-using SizeFunc = void (*)(uint32_t &total_size, const void *field_ptr, uint8_t precalced_field_id_size, bool force);
-using DecodeLengthFunc = bool (*)(void *field_ptr, ProtoLengthDelimited value);
-
-// Function pointer types for repeated fields used by V2 structures
-using RepeatedEncodeFunc = void (*)(ProtoWriteBuffer &, const void *field_ptr, uint8_t field_num);
-using RepeatedSizeFunc = void (*)(uint32_t &total_size, const void *field_ptr, uint8_t precalced_field_id_size);
-using RepeatedDecodeLengthFunc = bool (*)(void *field_ptr, ProtoLengthDelimited value);
-
-// Message handler registry entry
-struct MessageHandler {
-  EncodeFunc encode;
-  SizeFunc size;
-  DecodeLengthFunc decode;
-};
-
-// Repeated message handler registry entry
-struct RepeatedMessageHandler {
-  RepeatedEncodeFunc encode;
-  RepeatedSizeFunc size;
-  RepeatedDecodeLengthFunc decode;
-};
-
-// Global message handler registries (defined in api_pb2.cpp)
-extern const MessageHandler MESSAGE_HANDLERS[];
-extern const uint8_t MESSAGE_HANDLER_COUNT;
-extern const RepeatedMessageHandler REPEATED_MESSAGE_HANDLERS[];
-extern const uint8_t REPEATED_MESSAGE_HANDLER_COUNT;
-
-// Optimized metadata structure (4 bytes - no padding on 32-bit architectures)
-struct FieldMeta {
-  uint8_t field_num;      // Protobuf field number (1-255)
-  uint8_t type_and_size;  // bits 0-4: ProtoFieldType, bits 5-6: precalced_field_id_size-1, bit 7: reserved
-  union {
-    uint16_t offset;  // For non-message types: offset in class (0-65535)
-    struct {
-      uint8_t offset_low;       // For TYPE_MESSAGE: low byte of offset (bits 0-7)
-      uint8_t message_type_id;  // For TYPE_MESSAGE: bits 0-1: offset high (bits 8-9), bits 2-7: handler index (0-63)
-    };
-  };
-
-  // Helper methods
-  inline ProtoFieldType get_type() const { return static_cast<ProtoFieldType>(type_and_size & 0x1F); }
-  inline uint8_t get_precalced_size() const { return ((type_and_size >> 5) & 0x03) + 1; }
-  inline uint16_t get_offset() const {
-    if (get_type() == ProtoFieldType::TYPE_MESSAGE) {
-      // Reconstruct full offset from packed fields (10-bit offset)
-      // Bits 0-7 from offset_low, bits 8-9 from lower 2 bits of message_type_id
-      return static_cast<uint16_t>(offset_low) | (static_cast<uint16_t>(message_type_id & 0x03) << 8);
-    }
-    return offset;
-  }
-  inline uint8_t get_message_type_id() const { return message_type_id >> 2; }  // Upper 6 bits for type ID (0-63)
-};
-
-// Optimized repeated field metadata (4 bytes - no padding on 32-bit architectures)
-struct RepeatedFieldMeta {
-  uint8_t field_num;      // Protobuf field number (1-255)
-  uint8_t type_and_size;  // bits 0-4: ProtoFieldType, bits 5-6: precalced_field_id_size-1, bit 7: reserved
-  union {
-    uint16_t offset;  // For non-message types: offset in class (0-65535)
-    struct {
-      uint8_t offset_low;       // For TYPE_MESSAGE: low byte of offset (bits 0-7)
-      uint8_t message_type_id;  // For TYPE_MESSAGE: bits 0-1: offset high (bits 8-9), bits 2-7: handler index (0-63)
-    };
-  };
-
-  // Helper methods
-  inline ProtoFieldType get_type() const { return static_cast<ProtoFieldType>(type_and_size & 0x1F); }
-  inline uint8_t get_precalced_size() const { return ((type_and_size >> 5) & 0x03) + 1; }
-  inline uint16_t get_offset() const {
-    if (get_type() == ProtoFieldType::TYPE_MESSAGE) {
-      // Reconstruct full offset from packed fields (10-bit offset)
-      // Bits 0-7 from offset_low, bits 8-9 from lower 2 bits of message_type_id
-      return static_cast<uint16_t>(offset_low) | (static_cast<uint16_t>(message_type_id & 0x03) << 8);
-    }
-    return offset;
-  }
-  inline uint8_t get_message_type_id() const { return message_type_id >> 2; }  // Upper 6 bits for type ID (0-63)
-};
-
-// Binary search for field lookup - optimized for performance
-inline const FieldMeta *find_field_binary(const FieldMeta *fields, uint8_t count, uint8_t field_id) {
-  uint8_t left = 0;
-  uint8_t right = count;
-
-  while (left < right) {
-    uint8_t mid = (left + right) / 2;
-    uint8_t mid_field = fields[mid].field_num;
-
-    if (mid_field < field_id) {
-      left = mid + 1;
-    } else if (mid_field > field_id) {
-      right = mid;
-    } else {
-      // Found field_id
-      return &fields[mid];
-    }
-  }
-
-  return nullptr;  // Field not found
-}
+// NOTE: Proto64Bit class removed - wire type 1 (64-bit fixed) not supported
 
 class ProtoWriteBuffer {
  public:
   ProtoWriteBuffer(std::vector<uint8_t> *buffer) : buffer_(buffer) {}
-  inline void write(uint8_t value) { this->buffer_->push_back(value); }
-  inline void encode_varint_raw(ProtoVarInt value) { value.encode(*this->buffer_); }
-  inline void encode_varint_raw(uint32_t value) { this->encode_varint_raw(ProtoVarInt(value)); }
+  void write(uint8_t value) { this->buffer_->push_back(value); }
+  void encode_varint_raw(ProtoVarInt value) { value.encode(*this->buffer_); }
+  void encode_varint_raw(uint32_t value) { this->encode_varint_raw(ProtoVarInt(value)); }
   /**
    * Encode a field key (tag/wire type combination).
    *
    * @param field_id Field number (tag) in the protobuf message
    * @param type Wire type value:
    *   - 0: Varint (int32, int64, uint32, uint64, sint32, sint64, bool, enum)
-   *   - 1: 64-bit (fixed64, sfixed64, double)
    *   - 2: Length-delimited (string, bytes, embedded messages, packed repeated fields)
    *   - 5: 32-bit (fixed32, sfixed32, float)
+   *   - Note: Wire type 1 (64-bit fixed) is not supported
    *
    * Following https://protobuf.dev/programming-guides/encoding/#structure
    */
-  inline void encode_field_raw(uint32_t field_id, uint32_t type) {
+  void encode_field_raw(uint32_t field_id, uint32_t type) {
     uint32_t val = (field_id << 3) | (type & 0b111);
     this->encode_varint_raw(val);
   }
-  inline void encode_string(uint32_t field_id, const char *string, size_t len, bool force = false) {
+  void encode_string(uint32_t field_id, const char *string, size_t len, bool force = false) {
     if (len == 0 && !force)
       return;
 
@@ -373,25 +208,25 @@ class ProtoWriteBuffer {
     auto *data = reinterpret_cast<const uint8_t *>(string);
     this->buffer_->insert(this->buffer_->end(), data, data + len);
   }
-  inline void encode_string(uint32_t field_id, const std::string &value, bool force = false) {
+  void encode_string(uint32_t field_id, const std::string &value, bool force = false) {
     this->encode_string(field_id, value.data(), value.size(), force);
   }
-  inline void encode_bytes(uint32_t field_id, const uint8_t *data, size_t len, bool force = false) {
+  void encode_bytes(uint32_t field_id, const uint8_t *data, size_t len, bool force = false) {
     this->encode_string(field_id, reinterpret_cast<const char *>(data), len, force);
   }
-  inline void encode_uint32(uint32_t field_id, uint32_t value, bool force = false) {
+  void encode_uint32(uint32_t field_id, uint32_t value, bool force = false) {
     if (value == 0 && !force)
       return;
     this->encode_field_raw(field_id, 0);  // type 0: Varint - uint32
     this->encode_varint_raw(value);
   }
-  inline void encode_uint64(uint32_t field_id, uint64_t value, bool force = false) {
+  void encode_uint64(uint32_t field_id, uint64_t value, bool force = false) {
     if (value == 0 && !force)
       return;
     this->encode_field_raw(field_id, 0);  // type 0: Varint - uint64
     this->encode_varint_raw(ProtoVarInt(value));
   }
-  inline void encode_bool(uint32_t field_id, bool value, bool force = false) {
+  void encode_bool(uint32_t field_id, bool value, bool force = false) {
     if (!value && !force)
       return;
     this->encode_field_raw(field_id, 0);  // type 0: Varint - bool
@@ -402,15 +237,16 @@ class ProtoWriteBuffer {
       return;
 
     this->encode_field_raw(field_id, 5);  // type 5: 32-bit fixed32
-    // Reserve space and write all 4 bytes at once for better performance
-    size_t pos = this->buffer_->size();
-    this->buffer_->resize(pos + 4);
-    (*this->buffer_)[pos] = (value >> 0) & 0xFF;
-    (*this->buffer_)[pos + 1] = (value >> 8) & 0xFF;
-    (*this->buffer_)[pos + 2] = (value >> 16) & 0xFF;
-    (*this->buffer_)[pos + 3] = (value >> 24) & 0xFF;
+    this->write((value >> 0) & 0xFF);
+    this->write((value >> 8) & 0xFF);
+    this->write((value >> 16) & 0xFF);
+    this->write((value >> 24) & 0xFF);
   }
-  inline void encode_float(uint32_t field_id, float value, bool force = false) {
+  // NOTE: Wire type 1 (64-bit fixed: double, fixed64, sfixed64) is intentionally
+  // not supported to reduce overhead on embedded systems. All ESPHome devices are
+  // 32-bit microcontrollers where 64-bit operations are expensive. If 64-bit support
+  // is needed in the future, the necessary encoding/decoding functions must be added.
+  void encode_float(uint32_t field_id, float value, bool force = false) {
     if (value == 0.0f && !force)
       return;
 
@@ -421,7 +257,7 @@ class ProtoWriteBuffer {
     val.value = value;
     this->encode_fixed32(field_id, val.raw);
   }
-  inline void encode_int32(uint32_t field_id, int32_t value, bool force = false) {
+  void encode_int32(uint32_t field_id, int32_t value, bool force = false) {
     if (value < 0) {
       // negative int32 is always 10 byte long
       this->encode_int64(field_id, value, force);
@@ -429,10 +265,10 @@ class ProtoWriteBuffer {
     }
     this->encode_uint32(field_id, static_cast<uint32_t>(value), force);
   }
-  inline void encode_int64(uint32_t field_id, int64_t value, bool force = false) {
+  void encode_int64(uint32_t field_id, int64_t value, bool force = false) {
     this->encode_uint64(field_id, static_cast<uint64_t>(value), force);
   }
-  inline void encode_sint32(uint32_t field_id, int32_t value, bool force = false) {
+  void encode_sint32(uint32_t field_id, int32_t value, bool force = false) {
     uint32_t uvalue;
     if (value < 0) {
       uvalue = ~(value << 1);
@@ -441,7 +277,7 @@ class ProtoWriteBuffer {
     }
     this->encode_uint32(field_id, uvalue, force);
   }
-  inline void encode_sint64(uint32_t field_id, int64_t value, bool force = false) {
+  void encode_sint64(uint32_t field_id, int64_t value, bool force = false) {
     uint64_t uvalue;
     if (value < 0) {
       uvalue = ~(value << 1);
@@ -450,23 +286,7 @@ class ProtoWriteBuffer {
     }
     this->encode_uint64(field_id, uvalue, force);
   }
-  inline void encode_sfixed32(uint32_t field_id, int32_t value, bool force = false) {
-    if (!force && value == 0)
-      return;
-    this->encode_fixed32(field_id, static_cast<uint32_t>(value), force);
-  }
-  template<class C> void encode_message(uint32_t field_id, const C &value, bool force = false) {
-    this->encode_field_raw(field_id, 2);  // type 2: Length-delimited message
-    size_t begin = this->buffer_->size();
-
-    value.encode(*this);
-
-    const uint32_t nested_length = this->buffer_->size() - begin;
-    // add size varint
-    std::vector<uint8_t> var;
-    ProtoVarInt(nested_length).encode(var);
-    this->buffer_->insert(this->buffer_->begin() + begin, var.begin(), var.end());
-  }
+  void encode_message(uint32_t field_id, const ProtoMessage &value, bool force = false);
   std::vector<uint8_t> *get_buffer() const { return buffer_; }
 
  protected:
@@ -476,18 +296,11 @@ class ProtoWriteBuffer {
 class ProtoMessage {
  public:
   virtual ~ProtoMessage() = default;
-
-  // Metadata getters - must be implemented by derived classes
-  virtual const FieldMeta *get_field_metadata() const { return nullptr; }
-  virtual uint8_t get_field_count() const { return 0; }
-  virtual const RepeatedFieldMeta *get_repeated_field_metadata() const { return nullptr; }
-  virtual uint8_t get_repeated_field_count() const { return 0; }
-
-  // Encode/decode/calculate_size using V2 metadata (will check for V3 first)
-  void encode(ProtoWriteBuffer buffer) const;
+  // Default implementation for messages with no fields
+  virtual void encode(ProtoWriteBuffer buffer) const {}
   void decode(const uint8_t *buffer, size_t length);
-  void calculate_size(uint32_t &total_size) const;
-
+  // Default implementation for messages with no fields
+  virtual void calculate_size(uint32_t &total_size) const {}
 #ifdef HAS_PROTO_MESSAGE_DUMP
   std::string dump() const;
   virtual void dump_to(std::string &out) const = 0;
@@ -495,8 +308,511 @@ class ProtoMessage {
 #endif
 
  protected:
+  virtual bool decode_varint(uint32_t field_id, ProtoVarInt value) { return false; }
+  virtual bool decode_length(uint32_t field_id, ProtoLengthDelimited value) { return false; }
+  virtual bool decode_32bit(uint32_t field_id, Proto32Bit value) { return false; }
+  // NOTE: decode_64bit removed - wire type 1 not supported
 };
 
+class ProtoSize {
+ public:
+  /**
+   * @brief ProtoSize class for Protocol Buffer serialization size calculation
+   *
+   * This class provides static methods to calculate the exact byte counts needed
+   * for encoding various Protocol Buffer field types. All methods are designed to be
+   * efficient for the common case where many fields have default values.
+   *
+   * Implements Protocol Buffer encoding size calculation according to:
+   * https://protobuf.dev/programming-guides/encoding/
+   *
+   * Key features:
+   * - Early-return optimization for zero/default values
+   * - Direct total_size updates to avoid unnecessary additions
+   * - Specialized handling for different field types according to protobuf spec
+   * - Templated helpers for repeated fields and messages
+   */
+
+  /**
+   * @brief Calculates the size in bytes needed to encode a uint32_t value as a varint
+   *
+   * @param value The uint32_t value to calculate size for
+   * @return The number of bytes needed to encode the value
+   */
+  static inline uint32_t varint(uint32_t value) {
+    // Optimized varint size calculation using leading zeros
+    // Each 7 bits requires one byte in the varint encoding
+    if (value < 128)
+      return 1;  // 7 bits, common case for small values
+
+    // For larger values, count bytes needed based on the position of the highest bit set
+    if (value < 16384) {
+      return 2;  // 14 bits
+    } else if (value < 2097152) {
+      return 3;  // 21 bits
+    } else if (value < 268435456) {
+      return 4;  // 28 bits
+    } else {
+      return 5;  // 32 bits (maximum for uint32_t)
+    }
+  }
+
+  /**
+   * @brief Calculates the size in bytes needed to encode a uint64_t value as a varint
+   *
+   * @param value The uint64_t value to calculate size for
+   * @return The number of bytes needed to encode the value
+   */
+  static inline uint32_t varint(uint64_t value) {
+    // Handle common case of values fitting in uint32_t (vast majority of use cases)
+    if (value <= UINT32_MAX) {
+      return varint(static_cast<uint32_t>(value));
+    }
+
+    // For larger values, determine size based on highest bit position
+    if (value < (1ULL << 35)) {
+      return 5;  // 35 bits
+    } else if (value < (1ULL << 42)) {
+      return 6;  // 42 bits
+    } else if (value < (1ULL << 49)) {
+      return 7;  // 49 bits
+    } else if (value < (1ULL << 56)) {
+      return 8;  // 56 bits
+    } else if (value < (1ULL << 63)) {
+      return 9;  // 63 bits
+    } else {
+      return 10;  // 64 bits (maximum for uint64_t)
+    }
+  }
+
+  /**
+   * @brief Calculates the size in bytes needed to encode an int32_t value as a varint
+   *
+   * Special handling is needed for negative values, which are sign-extended to 64 bits
+   * in Protocol Buffers, resulting in a 10-byte varint.
+   *
+   * @param value The int32_t value to calculate size for
+   * @return The number of bytes needed to encode the value
+   */
+  static inline uint32_t varint(int32_t value) {
+    // Negative values are sign-extended to 64 bits in protocol buffers,
+    // which always results in a 10-byte varint for negative int32
+    if (value < 0) {
+      return 10;  // Negative int32 is always 10 bytes long
+    }
+    // For non-negative values, use the uint32_t implementation
+    return varint(static_cast<uint32_t>(value));
+  }
+
+  /**
+   * @brief Calculates the size in bytes needed to encode an int64_t value as a varint
+   *
+   * @param value The int64_t value to calculate size for
+   * @return The number of bytes needed to encode the value
+   */
+  static inline uint32_t varint(int64_t value) {
+    // For int64_t, we convert to uint64_t and calculate the size
+    // This works because the bit pattern determines the encoding size,
+    // and we've handled negative int32 values as a special case above
+    return varint(static_cast<uint64_t>(value));
+  }
+
+  /**
+   * @brief Calculates the size in bytes needed to encode a field ID and wire type
+   *
+   * @param field_id The field identifier
+   * @param type The wire type value (from the WireType enum in the protobuf spec)
+   * @return The number of bytes needed to encode the field ID and wire type
+   */
+  static inline uint32_t field(uint32_t field_id, uint32_t type) {
+    uint32_t tag = (field_id << 3) | (type & 0b111);
+    return varint(tag);
+  }
+
+  /**
+   * @brief Common parameters for all add_*_field methods
+   *
+   * All add_*_field methods follow these common patterns:
+   *
+   * @param total_size Reference to the total message size to update
+   * @param field_id_size Pre-calculated size of the field ID in bytes
+   * @param value The value to calculate size for (type varies)
+   * @param force Whether to calculate size even if the value is default/zero/empty
+   *
+   * Each method follows this implementation pattern:
+   * 1. Skip calculation if value is default (0, false, empty) and not forced
+   * 2. Calculate the size based on the field's encoding rules
+   * 3. Add the field_id_size + calculated value size to total_size
+   */
+
+  /**
+   * @brief Calculates and adds the size of an int32 field to the total message size
+   */
+  static inline void add_int32_field(uint32_t &total_size, uint32_t field_id_size, int32_t value) {
+    // Skip calculation if value is zero
+    if (value == 0) {
+      return;  // No need to update total_size
+    }
+
+    // Calculate and directly add to total_size
+    if (value < 0) {
+      // Negative values are encoded as 10-byte varints in protobuf
+      total_size += field_id_size + 10;
+    } else {
+      // For non-negative values, use the standard varint size
+      total_size += field_id_size + varint(static_cast<uint32_t>(value));
+    }
+  }
+
+  /**
+   * @brief Calculates and adds the size of an int32 field to the total message size (repeated field version)
+   */
+  static inline void add_int32_field_repeated(uint32_t &total_size, uint32_t field_id_size, int32_t value) {
+    // Always calculate size for repeated fields
+    if (value < 0) {
+      // Negative values are encoded as 10-byte varints in protobuf
+      total_size += field_id_size + 10;
+    } else {
+      // For non-negative values, use the standard varint size
+      total_size += field_id_size + varint(static_cast<uint32_t>(value));
+    }
+  }
+
+  /**
+   * @brief Calculates and adds the size of a uint32 field to the total message size
+   */
+  static inline void add_uint32_field(uint32_t &total_size, uint32_t field_id_size, uint32_t value) {
+    // Skip calculation if value is zero
+    if (value == 0) {
+      return;  // No need to update total_size
+    }
+
+    // Calculate and directly add to total_size
+    total_size += field_id_size + varint(value);
+  }
+
+  /**
+   * @brief Calculates and adds the size of a uint32 field to the total message size (repeated field version)
+   */
+  static inline void add_uint32_field_repeated(uint32_t &total_size, uint32_t field_id_size, uint32_t value) {
+    // Always calculate size for repeated fields
+    total_size += field_id_size + varint(value);
+  }
+
+  /**
+   * @brief Calculates and adds the size of a boolean field to the total message size
+   */
+  static inline void add_bool_field(uint32_t &total_size, uint32_t field_id_size, bool value) {
+    // Skip calculation if value is false
+    if (!value) {
+      return;  // No need to update total_size
+    }
+
+    // Boolean fields always use 1 byte when true
+    total_size += field_id_size + 1;
+  }
+
+  /**
+   * @brief Calculates and adds the size of a boolean field to the total message size (repeated field version)
+   */
+  static inline void add_bool_field_repeated(uint32_t &total_size, uint32_t field_id_size, bool value) {
+    // Always calculate size for repeated fields
+    // Boolean fields always use 1 byte
+    total_size += field_id_size + 1;
+  }
+
+  /**
+   * @brief Calculates and adds the size of a fixed field to the total message size
+   *
+   * Fixed fields always take exactly N bytes (4 for fixed32/float, 8 for fixed64/double).
+   *
+   * @tparam NumBytes The number of bytes for this fixed field (4 or 8)
+   * @param is_nonzero Whether the value is non-zero
+   */
+  template<uint32_t NumBytes>
+  static inline void add_fixed_field(uint32_t &total_size, uint32_t field_id_size, bool is_nonzero) {
+    // Skip calculation if value is zero
+    if (!is_nonzero) {
+      return;  // No need to update total_size
+    }
+
+    // Fixed fields always take exactly NumBytes
+    total_size += field_id_size + NumBytes;
+  }
+
+  /**
+   * @brief Calculates and adds the size of a float field to the total message size
+   */
+  static inline void add_float_field(uint32_t &total_size, uint32_t field_id_size, float value) {
+    if (value != 0.0f) {
+      total_size += field_id_size + 4;
+    }
+  }
+
+  // NOTE: add_double_field removed - wire type 1 (64-bit: double) not supported
+  // to reduce overhead on embedded systems
+
+  /**
+   * @brief Calculates and adds the size of a fixed32 field to the total message size
+   */
+  static inline void add_fixed32_field(uint32_t &total_size, uint32_t field_id_size, uint32_t value) {
+    if (value != 0) {
+      total_size += field_id_size + 4;
+    }
+  }
+
+  // NOTE: add_fixed64_field removed - wire type 1 (64-bit: fixed64) not supported
+  // to reduce overhead on embedded systems
+
+  /**
+   * @brief Calculates and adds the size of a sfixed32 field to the total message size
+   */
+  static inline void add_sfixed32_field(uint32_t &total_size, uint32_t field_id_size, int32_t value) {
+    if (value != 0) {
+      total_size += field_id_size + 4;
+    }
+  }
+
+  // NOTE: add_sfixed64_field removed - wire type 1 (64-bit: sfixed64) not supported
+  // to reduce overhead on embedded systems
+
+  /**
+   * @brief Calculates and adds the size of an enum field to the total message size
+   *
+   * Enum fields are encoded as uint32 varints.
+   */
+  static inline void add_enum_field(uint32_t &total_size, uint32_t field_id_size, uint32_t value) {
+    // Skip calculation if value is zero
+    if (value == 0) {
+      return;  // No need to update total_size
+    }
+
+    // Enums are encoded as uint32
+    total_size += field_id_size + varint(value);
+  }
+
+  /**
+   * @brief Calculates and adds the size of an enum field to the total message size (repeated field version)
+   *
+   * Enum fields are encoded as uint32 varints.
+   */
+  static inline void add_enum_field_repeated(uint32_t &total_size, uint32_t field_id_size, uint32_t value) {
+    // Always calculate size for repeated fields
+    // Enums are encoded as uint32
+    total_size += field_id_size + varint(value);
+  }
+
+  /**
+   * @brief Calculates and adds the size of a sint32 field to the total message size
+   *
+   * Sint32 fields use ZigZag encoding, which is more efficient for negative values.
+   */
+  static inline void add_sint32_field(uint32_t &total_size, uint32_t field_id_size, int32_t value) {
+    // Skip calculation if value is zero
+    if (value == 0) {
+      return;  // No need to update total_size
+    }
+
+    // ZigZag encoding for sint32: (n << 1) ^ (n >> 31)
+    uint32_t zigzag = (static_cast<uint32_t>(value) << 1) ^ (static_cast<uint32_t>(value >> 31));
+    total_size += field_id_size + varint(zigzag);
+  }
+
+  /**
+   * @brief Calculates and adds the size of a sint32 field to the total message size (repeated field version)
+   *
+   * Sint32 fields use ZigZag encoding, which is more efficient for negative values.
+   */
+  static inline void add_sint32_field_repeated(uint32_t &total_size, uint32_t field_id_size, int32_t value) {
+    // Always calculate size for repeated fields
+    // ZigZag encoding for sint32: (n << 1) ^ (n >> 31)
+    uint32_t zigzag = (static_cast<uint32_t>(value) << 1) ^ (static_cast<uint32_t>(value >> 31));
+    total_size += field_id_size + varint(zigzag);
+  }
+
+  /**
+   * @brief Calculates and adds the size of an int64 field to the total message size
+   */
+  static inline void add_int64_field(uint32_t &total_size, uint32_t field_id_size, int64_t value) {
+    // Skip calculation if value is zero
+    if (value == 0) {
+      return;  // No need to update total_size
+    }
+
+    // Calculate and directly add to total_size
+    total_size += field_id_size + varint(value);
+  }
+
+  /**
+   * @brief Calculates and adds the size of an int64 field to the total message size (repeated field version)
+   */
+  static inline void add_int64_field_repeated(uint32_t &total_size, uint32_t field_id_size, int64_t value) {
+    // Always calculate size for repeated fields
+    total_size += field_id_size + varint(value);
+  }
+
+  /**
+   * @brief Calculates and adds the size of a uint64 field to the total message size
+   */
+  static inline void add_uint64_field(uint32_t &total_size, uint32_t field_id_size, uint64_t value) {
+    // Skip calculation if value is zero
+    if (value == 0) {
+      return;  // No need to update total_size
+    }
+
+    // Calculate and directly add to total_size
+    total_size += field_id_size + varint(value);
+  }
+
+  /**
+   * @brief Calculates and adds the size of a uint64 field to the total message size (repeated field version)
+   */
+  static inline void add_uint64_field_repeated(uint32_t &total_size, uint32_t field_id_size, uint64_t value) {
+    // Always calculate size for repeated fields
+    total_size += field_id_size + varint(value);
+  }
+
+  // NOTE: sint64 support functions (add_sint64_field, add_sint64_field_repeated) removed
+  // sint64 type is not supported by ESPHome API to reduce overhead on embedded systems
+
+  /**
+   * @brief Calculates and adds the size of a string/bytes field to the total message size
+   */
+  static inline void add_string_field(uint32_t &total_size, uint32_t field_id_size, const std::string &str) {
+    // Skip calculation if string is empty
+    if (str.empty()) {
+      return;  // No need to update total_size
+    }
+
+    // Calculate and directly add to total_size
+    const uint32_t str_size = static_cast<uint32_t>(str.size());
+    total_size += field_id_size + varint(str_size) + str_size;
+  }
+
+  /**
+   * @brief Calculates and adds the size of a string/bytes field to the total message size (repeated field version)
+   */
+  static inline void add_string_field_repeated(uint32_t &total_size, uint32_t field_id_size, const std::string &str) {
+    // Always calculate size for repeated fields
+    const uint32_t str_size = static_cast<uint32_t>(str.size());
+    total_size += field_id_size + varint(str_size) + str_size;
+  }
+
+  /**
+   * @brief Calculates and adds the size of a nested message field to the total message size
+   *
+   * This helper function directly updates the total_size reference if the nested size
+   * is greater than zero.
+   *
+   * @param nested_size The pre-calculated size of the nested message
+   */
+  static inline void add_message_field(uint32_t &total_size, uint32_t field_id_size, uint32_t nested_size) {
+    // Skip calculation if nested message is empty
+    if (nested_size == 0) {
+      return;  // No need to update total_size
+    }
+
+    // Calculate and directly add to total_size
+    // Field ID + length varint + nested message content
+    total_size += field_id_size + varint(nested_size) + nested_size;
+  }
+
+  /**
+   * @brief Calculates and adds the size of a nested message field to the total message size (repeated field version)
+   *
+   * @param nested_size The pre-calculated size of the nested message
+   */
+  static inline void add_message_field_repeated(uint32_t &total_size, uint32_t field_id_size, uint32_t nested_size) {
+    // Always calculate size for repeated fields
+    // Field ID + length varint + nested message content
+    total_size += field_id_size + varint(nested_size) + nested_size;
+  }
+
+  /**
+   * @brief Calculates and adds the size of a nested message field to the total message size
+   *
+   * This version takes a ProtoMessage object, calculates its size internally,
+   * and updates the total_size reference. This eliminates the need for a temporary variable
+   * at the call site.
+   *
+   * @param message The nested message object
+   */
+  static inline void add_message_object(uint32_t &total_size, uint32_t field_id_size, const ProtoMessage &message) {
+    uint32_t nested_size = 0;
+    message.calculate_size(nested_size);
+
+    // Use the base implementation with the calculated nested_size
+    add_message_field(total_size, field_id_size, nested_size);
+  }
+
+  /**
+   * @brief Calculates and adds the size of a nested message field to the total message size (repeated field version)
+   *
+   * @param message The nested message object
+   */
+  static inline void add_message_object_repeated(uint32_t &total_size, uint32_t field_id_size,
+                                                 const ProtoMessage &message) {
+    uint32_t nested_size = 0;
+    message.calculate_size(nested_size);
+
+    // Use the base implementation with the calculated nested_size
+    add_message_field_repeated(total_size, field_id_size, nested_size);
+  }
+
+  /**
+   * @brief Calculates and adds the sizes of all messages in a repeated field to the total message size
+   *
+   * This helper processes a vector of message objects, calculating the size for each message
+   * and adding it to the total size.
+   *
+   * @tparam MessageType The type of the nested messages in the vector
+   * @param messages Vector of message objects
+   */
+  template<typename MessageType>
+  static inline void add_repeated_message(uint32_t &total_size, uint32_t field_id_size,
+                                          const std::vector<MessageType> &messages) {
+    // Skip if the vector is empty
+    if (messages.empty()) {
+      return;
+    }
+
+    // Use the repeated field version for all messages
+    for (const auto &message : messages) {
+      add_message_object_repeated(total_size, field_id_size, message);
+    }
+  }
+};
+
+// Implementation of encode_message - must be after ProtoMessage is defined
+inline void ProtoWriteBuffer::encode_message(uint32_t field_id, const ProtoMessage &value, bool force) {
+  this->encode_field_raw(field_id, 2);  // type 2: Length-delimited message
+
+  // Calculate the message size first
+  uint32_t msg_length_bytes = 0;
+  value.calculate_size(msg_length_bytes);
+
+  // Calculate how many bytes the length varint needs
+  uint32_t varint_length_bytes = ProtoSize::varint(msg_length_bytes);
+
+  // Reserve exact space for the length varint
+  size_t begin = this->buffer_->size();
+  this->buffer_->resize(this->buffer_->size() + varint_length_bytes);
+
+  // Write the length varint directly
+  ProtoVarInt(msg_length_bytes).encode_to_buffer_unchecked(this->buffer_->data() + begin, varint_length_bytes);
+
+  // Now encode the message content - it will append to the buffer
+  value.encode(*this);
+
+  // Verify that the encoded size matches what we calculated
+  assert(this->buffer_->size() == begin + varint_length_bytes + msg_length_bytes);
+}
+
+// Implementation of decode_to_message - must be after ProtoMessage is defined
+inline void ProtoLengthDelimited::decode_to_message(ProtoMessage &msg) const {
+  msg.decode(this->value_, this->length_);
+}
+
 template<typename T> const char *proto_enum_to_string(T value);
 
 class ProtoService {
@@ -553,17 +869,6 @@ class ProtoService {
     return true;
   }
 };
-template<typename MessageType>
-void encode_repeated_message_field(ProtoWriteBuffer &buffer, const void *field_ptr, uint8_t field_num);
-
-template<typename MessageType>
-void size_repeated_message_field(uint32_t &total_size, const void *field_ptr, uint8_t precalced_field_id_size);
-
-template<typename MessageType>
-void encode_message_field(ProtoWriteBuffer &buffer, const void *field_ptr, uint8_t field_num);
-
-template<typename MessageType>
-void size_message_field(uint32_t &total_size, const void *field_ptr, uint8_t precalced_field_id_size, bool force);
 
 }  // namespace api
 }  // namespace esphome

esphome/components/api/proto_templates.h

@@ -1,53 +0,0 @@
-#pragma once
-
-#include "proto.h"
-#include "api_pb2_size.h"
-
-namespace esphome {
-namespace api {
-
-// Template functions for message field handling (regular fields)
-template<typename MessageType>
-inline void encode_message_field(ProtoWriteBuffer &buffer, const void *field_ptr, uint8_t field_num) {
-  const MessageType *msg = static_cast<const MessageType *>(field_ptr);
-  buffer.encode_message<MessageType>(field_num, *msg);
-}
-
-template<typename MessageType>
-inline void size_message_field(uint32_t &total_size, const void *field_ptr, uint8_t precalced_field_id_size,
-                               bool force) {
-  const MessageType *msg = static_cast<const MessageType *>(field_ptr);
-  ProtoSize::add_message_object(total_size, precalced_field_id_size, *msg, force);
-}
-
-template<typename MessageType> inline bool decode_message_field(void *field_ptr, ProtoLengthDelimited value) {
-  MessageType *msg = static_cast<MessageType *>(field_ptr);
-  *msg = value.as_message<MessageType>();
-  return true;
-}
-
-// Template repeated field functions (must be in header for instantiation)
-template<typename MessageType>
-inline void encode_repeated_message_field(ProtoWriteBuffer &buffer, const void *field_ptr, uint8_t field_num) {
-  const auto *vec = static_cast<const std::vector<MessageType> *>(field_ptr);
-  for (const auto &msg : *vec) {
-    buffer.encode_message<MessageType>(field_num, msg, true);
-  }
-}
-
-// Template size functions for repeated fields (must be in header for instantiation)
-template<typename MessageType>
-inline void size_repeated_message_field(uint32_t &total_size, const void *field_ptr, uint8_t precalced_field_id_size) {
-  const auto *vec = static_cast<const std::vector<MessageType> *>(field_ptr);
-  ProtoSize::add_repeated_message<MessageType>(total_size, precalced_field_id_size, *vec);
-}
-
-// Template decode functions for repeated fields
-template<typename MessageType> inline bool decode_repeated_message_field(void *field_ptr, ProtoLengthDelimited value) {
-  auto *vec = static_cast<std::vector<MessageType> *>(field_ptr);
-  vec->push_back(value.as_message<MessageType>());
-  return true;
-}
-
-}  // namespace api
-}  // namespace esphome

esphome/components/api/user_services.h

@@ -7,6 +7,7 @@
 #include "esphome/core/automation.h"
 #include "api_pb2.h"
 
+#ifdef USE_API_SERVICES
 namespace esphome {
 namespace api {
 
@@ -15,6 +16,8 @@ class UserServiceDescriptor {
   virtual ListEntitiesServicesResponse encode_list_service_response() = 0;
 
   virtual bool execute_service(const ExecuteServiceRequest &req) = 0;
+
+  bool is_internal() { return false; }
 };
 
 template<typename T> T get_execute_arg_value(const ExecuteServiceArgument &arg);
@@ -73,3 +76,4 @@ template<typename... Ts> class UserServiceTrigger : public UserServiceBase<Ts...
 
 }  // namespace api
 }  // namespace esphome
+#endif  // USE_API_SERVICES

esphome/components/as3935_spi/as3935_spi.h

@@ -3,8 +3,6 @@
 #include "esphome/core/component.h"
 #include "esphome/components/as3935/as3935.h"
 #include "esphome/components/spi/spi.h"
-#include "esphome/components/sensor/sensor.h"
-#include "esphome/components/binary_sensor/binary_sensor.h"
 
 namespace esphome {
 namespace as3935_spi {

esphome/components/async_tcp/__init__.py

@@ -31,7 +31,7 @@ CONFIG_SCHEMA = cv.All(
 async def to_code(config):
     if CORE.is_esp32 or CORE.is_libretiny:
         # https://github.com/ESP32Async/AsyncTCP
-        cg.add_library("ESP32Async/AsyncTCP", "3.4.4")
+        cg.add_library("ESP32Async/AsyncTCP", "3.4.5")
     elif CORE.is_esp8266:
         # https://github.com/ESP32Async/ESPAsyncTCP
         cg.add_library("ESP32Async/ESPAsyncTCP", "2.0.0")

esphome/components/bluetooth_proxy/__init__.py

@@ -85,13 +85,13 @@ async def to_code(config):
     await cg.register_component(var, config)
 
     cg.add(var.set_active(config[CONF_ACTIVE]))
-    await esp32_ble_tracker.register_ble_device(var, config)
+    await esp32_ble_tracker.register_raw_ble_device(var, config)
 
     for connection_conf in config.get(CONF_CONNECTIONS, []):
         connection_var = cg.new_Pvariable(connection_conf[CONF_ID])
         await cg.register_component(connection_var, connection_conf)
         cg.add(var.register_connection(connection_var))
-        await esp32_ble_tracker.register_client(connection_var, connection_conf)
+        await esp32_ble_tracker.register_raw_client(connection_var, connection_conf)
 
     if config.get(CONF_CACHE_SERVICES):
         add_idf_sdkconfig_option("CONFIG_BT_GATTC_CACHE_NVS_FLASH", True)

esphome/components/bluetooth_proxy/bluetooth_proxy.cpp

@@ -42,15 +42,13 @@ void BluetoothProxy::send_bluetooth_scanner_state_(esp32_ble_tracker::ScannerSta
   this->api_connection_->send_message(resp);
 }
 
+#ifdef USE_ESP32_BLE_DEVICE
 bool BluetoothProxy::parse_device(const esp32_ble_tracker::ESPBTDevice &device) {
-  if (!api::global_api_server->is_connected() || this->api_connection_ == nullptr || this->raw_advertisements_)
-    return false;
-
-  ESP_LOGV(TAG, "Proxying packet from %s - %s. RSSI: %d dB", device.get_name().c_str(), device.address_str().c_str(),
-           device.get_rssi());
-  this->send_api_packet_(device);
-  return true;
+  // This method should never be called since bluetooth_proxy always uses raw advertisements
+  // but we need to provide an implementation to satisfy the virtual method requirement
+  return false;
 }
+#endif
 
 // Batch size for BLE advertisements to maximize WiFi efficiency
 // Each advertisement is up to 80 bytes when packaged (including protocol overhead)
@@ -69,7 +67,7 @@ std::vector<api::BluetoothLERawAdvertisement> batch_buffer;
 static std::vector<api::BluetoothLERawAdvertisement> &get_batch_buffer() { return batch_buffer; }
 
 bool BluetoothProxy::parse_devices(const esp32_ble::BLEScanResult *scan_results, size_t count) {
-  if (!api::global_api_server->is_connected() || this->api_connection_ == nullptr || !this->raw_advertisements_)
+  if (!api::global_api_server->is_connected() || this->api_connection_ == nullptr)
     return false;
 
   // Get the batch buffer reference
@@ -116,6 +114,7 @@ void BluetoothProxy::flush_pending_advertisements() {
   this->api_connection_->send_message(resp);
 }
 
+#ifdef USE_ESP32_BLE_DEVICE
 void BluetoothProxy::send_api_packet_(const esp32_ble_tracker::ESPBTDevice &device) {
   api::BluetoothLEAdvertisementResponse resp;
   resp.address = device.address_uint64();
@@ -153,14 +152,14 @@ void BluetoothProxy::send_api_packet_(const esp32_ble_tracker::ESPBTDevice &devi
 
   this->api_connection_->send_message(resp);
 }
+#endif  // USE_ESP32_BLE_DEVICE
 
 void BluetoothProxy::dump_config() {
   ESP_LOGCONFIG(TAG, "Bluetooth Proxy:");
   ESP_LOGCONFIG(TAG,
                 "  Active: %s\n"
-                "  Connections: %d\n"
-                "  Raw advertisements: %s",
-                YESNO(this->active_), this->connections_.size(), YESNO(this->raw_advertisements_));
+                "  Connections: %d",
+                YESNO(this->active_), this->connections_.size());
 }
 
 int BluetoothProxy::get_bluetooth_connections_free() {
@@ -188,15 +187,13 @@ void BluetoothProxy::loop() {
   }
 
   // Flush any pending BLE advertisements that have been accumulated but not yet sent
-  if (this->raw_advertisements_) {
-    static uint32_t last_flush_time = 0;
-    uint32_t now = App.get_loop_component_start_time();
+  static uint32_t last_flush_time = 0;
+  uint32_t now = App.get_loop_component_start_time();
 
-    // Flush accumulated advertisements every 100ms
-    if (now - last_flush_time >= 100) {
-      this->flush_pending_advertisements();
-      last_flush_time = now;
-    }
+  // Flush accumulated advertisements every 100ms
+  if (now - last_flush_time >= 100) {
+    this->flush_pending_advertisements();
+    last_flush_time = now;
   }
   for (auto *connection : this->connections_) {
     if (connection->send_service_ == connection->service_count_) {
@@ -318,9 +315,7 @@ void BluetoothProxy::loop() {
 }
 
 esp32_ble_tracker::AdvertisementParserType BluetoothProxy::get_advertisement_parser_type() {
-  if (this->raw_advertisements_)
-    return esp32_ble_tracker::AdvertisementParserType::RAW_ADVERTISEMENTS;
-  return esp32_ble_tracker::AdvertisementParserType::PARSED_ADVERTISEMENTS;
+  return esp32_ble_tracker::AdvertisementParserType::RAW_ADVERTISEMENTS;
 }
 
 BluetoothConnection *BluetoothProxy::get_connection_(uint64_t address, bool reserve) {
@@ -565,7 +560,6 @@ void BluetoothProxy::subscribe_api_connection(api::APIConnection *api_connection
     return;
   }
   this->api_connection_ = api_connection;
-  this->raw_advertisements_ = flags & BluetoothProxySubscriptionFlag::SUBSCRIPTION_RAW_ADVERTISEMENTS;
   this->parent_->recalculate_advertisement_parser_types();
 
   this->send_bluetooth_scanner_state_(this->parent_->get_scanner_state());
@@ -577,7 +571,6 @@ void BluetoothProxy::unsubscribe_api_connection(api::APIConnection *api_connecti
     return;
   }
   this->api_connection_ = nullptr;
-  this->raw_advertisements_ = false;
   this->parent_->recalculate_advertisement_parser_types();
 }
 

esphome/components/bluetooth_proxy/bluetooth_proxy.h

@@ -51,7 +51,9 @@ enum BluetoothProxySubscriptionFlag : uint32_t {
 class BluetoothProxy : public esp32_ble_tracker::ESPBTDeviceListener, public Component {
  public:
   BluetoothProxy();
+#ifdef USE_ESP32_BLE_DEVICE
   bool parse_device(const esp32_ble_tracker::ESPBTDevice &device) override;
+#endif
   bool parse_devices(const esp32_ble::BLEScanResult *scan_results, size_t count) override;
   void dump_config() override;
   void setup() override;
@@ -129,7 +131,9 @@ class BluetoothProxy : public esp32_ble_tracker::ESPBTDeviceListener, public Com
   }
 
  protected:
+#ifdef USE_ESP32_BLE_DEVICE
   void send_api_packet_(const esp32_ble_tracker::ESPBTDevice &device);
+#endif
   void send_bluetooth_scanner_state_(esp32_ble_tracker::ScannerState state);
 
   BluetoothConnection *get_connection_(uint64_t address, bool reserve);
@@ -143,8 +147,7 @@ class BluetoothProxy : public esp32_ble_tracker::ESPBTDeviceListener, public Com
 
   // Group 3: 1-byte types grouped together
   bool active_;
-  bool raw_advertisements_{false};
-  // 2 bytes used, 2 bytes padding
+  // 1 byte used, 3 bytes padding
 };
 
 extern BluetoothProxy *global_bluetooth_proxy;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)

esphome/components/const/__init__.py

@@ -3,6 +3,7 @@
 CODEOWNERS = ["@esphome/core"]
 
 CONF_BYTE_ORDER = "byte_order"
+CONF_COLOR_DEPTH = "color_depth"
 CONF_DRAW_ROUNDING = "draw_rounding"
 CONF_ON_STATE_CHANGE = "on_state_change"
 CONF_REQUEST_HEADERS = "request_headers"

esphome/components/debug/debug_esp32.cpp

@@ -53,6 +53,7 @@ void DebugComponent::on_shutdown() {
   auto pref = global_preferences->make_preference(REBOOT_MAX_LEN, fnv1_hash(REBOOT_KEY + App.get_name()));
   if (component != nullptr) {
     strncpy(buffer, component->get_component_source(), REBOOT_MAX_LEN - 1);
+    buffer[REBOOT_MAX_LEN - 1] = '\0';
   }
   ESP_LOGD(TAG, "Storing reboot source: %s", buffer);
   pref.save(&buffer);
@@ -68,6 +69,7 @@ std::string DebugComponent::get_reset_reason_() {
       auto pref = global_preferences->make_preference(REBOOT_MAX_LEN, fnv1_hash(REBOOT_KEY + App.get_name()));
       char buffer[REBOOT_MAX_LEN]{};
       if (pref.load(&buffer)) {
+        buffer[REBOOT_MAX_LEN - 1] = '\0';
         reset_reason = "Reboot request from " + std::string(buffer);
       }
     }

esphome/components/esp32/gpio.cpp

@@ -114,7 +114,6 @@ void ESP32InternalGPIOPin::setup() {
   if (flags_ & gpio::FLAG_OUTPUT) {
     gpio_set_drive_capability(pin_, drive_strength_);
   }
-  ESP_LOGD(TAG, "rtc: %d", SOC_GPIO_SUPPORT_RTC_INDEPENDENT);
 }
 
 void ESP32InternalGPIOPin::pin_mode(gpio::Flags flags) {

esphome/components/esp32_ble_client/ble_client_base.cpp

@@ -105,6 +105,7 @@ void BLEClientBase::dump_config() {
   }
 }
 
+#ifdef USE_ESP32_BLE_DEVICE
 bool BLEClientBase::parse_device(const espbt::ESPBTDevice &device) {
   if (!this->auto_connect_)
     return false;
@@ -122,6 +123,7 @@ bool BLEClientBase::parse_device(const espbt::ESPBTDevice &device) {
   this->remote_addr_type_ = device.get_address_type();
   return true;
 }
+#endif
 
 void BLEClientBase::connect() {
   ESP_LOGI(TAG, "[%d] [%s] 0x%02x Attempting BLE connection", this->connection_index_, this->address_str_.c_str(),

esphome/components/esp32_ble_client/ble_client_base.h

@@ -31,7 +31,9 @@ class BLEClientBase : public espbt::ESPBTClient, public Component {
   void dump_config() override;
 
   void run_later(std::function<void()> &&f);  // NOLINT
+#ifdef USE_ESP32_BLE_DEVICE
   bool parse_device(const espbt::ESPBTDevice &device) override;
+#endif
   void on_scan_end() override {}
   bool gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_t gattc_if,
                            esp_ble_gattc_cb_param_t *param) override;

esphome/components/esp32_ble_tracker/__init__.py

@@ -31,6 +31,8 @@ from esphome.const import (
     CONF_TRIGGER_ID,
 )
 from esphome.core import CORE
+from esphome.enum import StrEnum
+from esphome.types import ConfigType
 
 AUTO_LOAD = ["esp32_ble"]
 DEPENDENCIES = ["esp32"]
@@ -50,6 +52,25 @@ IDF_MAX_CONNECTIONS = 9
 
 _LOGGER = logging.getLogger(__name__)
 
+
+# Enum for BLE features
+class BLEFeatures(StrEnum):
+    ESP_BT_DEVICE = "ESP_BT_DEVICE"
+
+
+# Set to track which features are needed by components
+_required_features: set[BLEFeatures] = set()
+
+
+def register_ble_features(features: set[BLEFeatures]) -> None:
+    """Register BLE features that a component needs.
+
+    Args:
+        features: Set of BLEFeatures enum members
+    """
+    _required_features.update(features)
+
+
 esp32_ble_tracker_ns = cg.esphome_ns.namespace("esp32_ble_tracker")
 ESP32BLETracker = esp32_ble_tracker_ns.class_(
     "ESP32BLETracker",
@@ -277,6 +298,15 @@ async def to_code(config):
     cg.add(var.set_scan_window(int(params[CONF_WINDOW].total_milliseconds / 0.625)))
     cg.add(var.set_scan_active(params[CONF_ACTIVE]))
     cg.add(var.set_scan_continuous(params[CONF_CONTINUOUS]))
+
+    # Register ESP_BT_DEVICE feature if any of the automation triggers are used
+    if (
+        config.get(CONF_ON_BLE_ADVERTISE)
+        or config.get(CONF_ON_BLE_SERVICE_DATA_ADVERTISE)
+        or config.get(CONF_ON_BLE_MANUFACTURER_DATA_ADVERTISE)
+    ):
+        register_ble_features({BLEFeatures.ESP_BT_DEVICE})
+
     for conf in config.get(CONF_ON_BLE_ADVERTISE, []):
         trigger = cg.new_Pvariable(conf[CONF_TRIGGER_ID], var)
         if CONF_MAC_ADDRESS in conf:
@@ -334,6 +364,11 @@ async def to_code(config):
 
     cg.add_define("USE_OTA_STATE_CALLBACK")  # To be notified when an OTA update starts
     cg.add_define("USE_ESP32_BLE_CLIENT")
+
+    # Add feature-specific defines based on what's needed
+    if BLEFeatures.ESP_BT_DEVICE in _required_features:
+        cg.add_define("USE_ESP32_BLE_DEVICE")
+
     if config.get(CONF_SOFTWARE_COEXISTENCE):
         cg.add_define("USE_ESP32_BLE_SOFTWARE_COEXISTENCE")
 
@@ -382,13 +417,43 @@ async def esp32_ble_tracker_stop_scan_action_to_code(
     return var
 
 
-async def register_ble_device(var, config):
+async def register_ble_device(
+    var: cg.SafeExpType, config: ConfigType
+) -> cg.SafeExpType:
+    register_ble_features({BLEFeatures.ESP_BT_DEVICE})
     paren = await cg.get_variable(config[CONF_ESP32_BLE_ID])
     cg.add(paren.register_listener(var))
     return var
 
 
-async def register_client(var, config):
+async def register_client(var: cg.SafeExpType, config: ConfigType) -> cg.SafeExpType:
+    register_ble_features({BLEFeatures.ESP_BT_DEVICE})
+    paren = await cg.get_variable(config[CONF_ESP32_BLE_ID])
+    cg.add(paren.register_client(var))
+    return var
+
+
+async def register_raw_ble_device(
+    var: cg.SafeExpType, config: ConfigType
+) -> cg.SafeExpType:
+    """Register a BLE device listener that only needs raw advertisement data.
+
+    This does NOT register the ESP_BT_DEVICE feature, meaning ESPBTDevice
+    will not be compiled in if this is the only registration method used.
+    """
+    paren = await cg.get_variable(config[CONF_ESP32_BLE_ID])
+    cg.add(paren.register_listener(var))
+    return var
+
+
+async def register_raw_client(
+    var: cg.SafeExpType, config: ConfigType
+) -> cg.SafeExpType:
+    """Register a BLE client that only needs raw advertisement data.
+
+    This does NOT register the ESP_BT_DEVICE feature, meaning ESPBTDevice
+    will not be compiled in if this is the only registration method used.
+    """
     paren = await cg.get_variable(config[CONF_ESP32_BLE_ID])
     cg.add(paren.register_client(var))
     return var

esphome/components/esp32_ble_tracker/automation.h

@@ -7,6 +7,7 @@
 
 namespace esphome {
 namespace esp32_ble_tracker {
+#ifdef USE_ESP32_BLE_DEVICE
 class ESPBTAdvertiseTrigger : public Trigger<const ESPBTDevice &>, public ESPBTDeviceListener {
  public:
   explicit ESPBTAdvertiseTrigger(ESP32BLETracker *parent) { parent->register_listener(this); }
@@ -87,6 +88,7 @@ class BLEEndOfScanTrigger : public Trigger<>, public ESPBTDeviceListener {
   bool parse_device(const ESPBTDevice &device) override { return false; }
   void on_scan_end() override { this->trigger(); }
 };
+#endif  // USE_ESP32_BLE_DEVICE
 
 template<typename... Ts> class ESP32BLEStartScanAction : public Action<Ts...> {
  public:

esphome/components/esp32_ble_tracker/esp32_ble_tracker.cpp

@@ -141,6 +141,7 @@ void ESP32BLETracker::loop() {
       }
 
       if (this->parse_advertisements_) {
+#ifdef USE_ESP32_BLE_DEVICE
         ESPBTDevice device;
         device.parse_scan_rst(scan_result);
 
@@ -162,6 +163,7 @@ void ESP32BLETracker::loop() {
         if (!found && !this->scan_continuous_) {
           this->print_bt_device_info(device);
         }
+#endif  // USE_ESP32_BLE_DEVICE
       }
 
       // Move to next entry in ring buffer
@@ -511,6 +513,7 @@ void ESP32BLETracker::set_scanner_state_(ScannerState state) {
   this->scanner_state_callbacks_.call(state);
 }
 
+#ifdef USE_ESP32_BLE_DEVICE
 ESPBLEiBeacon::ESPBLEiBeacon(const uint8_t *data) { memcpy(&this->beacon_data_, data, sizeof(beacon_data_)); }
 optional<ESPBLEiBeacon> ESPBLEiBeacon::from_manufacturer_data(const ServiceData &data) {
   if (!data.uuid.contains(0x4C, 0x00))
@@ -751,13 +754,16 @@ void ESPBTDevice::parse_adv_(const uint8_t *payload, uint8_t len) {
     }
   }
 }
+
 std::string ESPBTDevice::address_str() const {
   char mac[24];
   snprintf(mac, sizeof(mac), "%02X:%02X:%02X:%02X:%02X:%02X", this->address_[0], this->address_[1], this->address_[2],
            this->address_[3], this->address_[4], this->address_[5]);
   return mac;
 }
+
 uint64_t ESPBTDevice::address_uint64() const { return esp32_ble::ble_addr_to_uint64(this->address_); }
+#endif  // USE_ESP32_BLE_DEVICE
 
 void ESP32BLETracker::dump_config() {
   ESP_LOGCONFIG(TAG, "BLE Tracker:");
@@ -796,6 +802,7 @@ void ESP32BLETracker::dump_config() {
   }
 }
 
+#ifdef USE_ESP32_BLE_DEVICE
 void ESP32BLETracker::print_bt_device_info(const ESPBTDevice &device) {
   const uint64_t address = device.address_uint64();
   for (auto &disc : this->already_discovered_) {
@@ -866,8 +873,9 @@ bool ESPBTDevice::resolve_irk(const uint8_t *irk) const {
   return ecb_ciphertext[15] == (addr64 & 0xff) && ecb_ciphertext[14] == ((addr64 >> 8) & 0xff) &&
          ecb_ciphertext[13] == ((addr64 >> 16) & 0xff);
 }
+#endif  // USE_ESP32_BLE_DEVICE
 
 }  // namespace esp32_ble_tracker
 }  // namespace esphome
 
-#endif
+#endif  // USE_ESP32

esphome/components/esp32_ble_tracker/esp32_ble_tracker.h

@@ -39,6 +39,7 @@ struct ServiceData {
   adv_data_t data;
 };
 
+#ifdef USE_ESP32_BLE_DEVICE
 class ESPBLEiBeacon {
  public:
   ESPBLEiBeacon() { memset(&this->beacon_data_, 0, sizeof(this->beacon_data_)); }
@@ -116,13 +117,16 @@ class ESPBTDevice {
   std::vector<ServiceData> service_datas_{};
   const BLEScanResult *scan_result_{nullptr};
 };
+#endif  // USE_ESP32_BLE_DEVICE
 
 class ESP32BLETracker;
 
 class ESPBTDeviceListener {
  public:
   virtual void on_scan_end() {}
+#ifdef USE_ESP32_BLE_DEVICE
   virtual bool parse_device(const ESPBTDevice &device) = 0;
+#endif
   virtual bool parse_devices(const BLEScanResult *scan_results, size_t count) { return false; };
   virtual AdvertisementParserType get_advertisement_parser_type() {
     return AdvertisementParserType::PARSED_ADVERTISEMENTS;
@@ -237,7 +241,9 @@ class ESP32BLETracker : public Component,
   void register_client(ESPBTClient *client);
   void recalculate_advertisement_parser_types();
 
+#ifdef USE_ESP32_BLE_DEVICE
   void print_bt_device_info(const ESPBTDevice &device);
+#endif
 
   void start_scan();
   void stop_scan();

esphome/components/esp32_camera/__init__.py

@@ -308,7 +308,7 @@ async def to_code(config):
     cg.add(var.set_frame_buffer_count(config[CONF_FRAME_BUFFER_COUNT]))
     cg.add(var.set_frame_size(config[CONF_RESOLUTION]))
 
-    cg.add_define("USE_ESP32_CAMERA")
+    cg.add_define("USE_CAMERA")
 
     if CORE.using_esp_idf:
         add_idf_component(name="espressif/esp32-camera", ref="2.0.15")

esphome/components/esp_ldo/__init__.py

@@ -20,14 +20,16 @@ adjusted_ids = set()
 
 CONFIG_SCHEMA = cv.All(
     cv.ensure_list(
-        {
-            cv.GenerateID(): cv.declare_id(EspLdo),
-            cv.Required(CONF_VOLTAGE): cv.All(
-                cv.voltage, cv.float_range(min=0.5, max=2.7)
-            ),
-            cv.Required(CONF_CHANNEL): cv.one_of(*CHANNELS, int=True),
-            cv.Optional(CONF_ADJUSTABLE, default=False): cv.boolean,
-        }
+        cv.COMPONENT_SCHEMA.extend(
+            {
+                cv.GenerateID(): cv.declare_id(EspLdo),
+                cv.Required(CONF_VOLTAGE): cv.All(
+                    cv.voltage, cv.float_range(min=0.5, max=2.7)
+                ),
+                cv.Required(CONF_CHANNEL): cv.one_of(*CHANNELS, int=True),
+                cv.Optional(CONF_ADJUSTABLE, default=False): cv.boolean,
+            }
+        )
     ),
     cv.only_with_esp_idf,
     only_on_variant(supported=[VARIANT_ESP32P4]),

esphome/components/esp_ldo/esp_ldo.h

@@ -17,6 +17,9 @@ class EspLdo : public Component {
   void set_adjustable(bool adjustable) { this->adjustable_ = adjustable; }
   void set_voltage(float voltage) { this->voltage_ = voltage; }
   void adjust_voltage(float voltage);
+  float get_setup_priority() const override {
+    return setup_priority::BUS;  // LDO setup should be done early
+  }
 
  protected:
   int channel_;

esphome/components/ethernet/__init__.py

@@ -342,5 +342,11 @@ async def to_code(config):
 
     cg.add_define("USE_ETHERNET")
 
+    # Disable WiFi when using Ethernet to save memory
+    if CORE.using_esp_idf:
+        add_idf_sdkconfig_option("CONFIG_ESP_WIFI_ENABLED", False)
+        # Also disable WiFi/BT coexistence since WiFi is disabled
+        add_idf_sdkconfig_option("CONFIG_SW_COEXIST_ENABLE", False)
+
     if CORE.using_arduino:
         cg.add_library("WiFi", None)

esphome/components/ethernet_info/ethernet_info_text_sensor.h

@@ -29,7 +29,6 @@ class IPAddressEthernetInfo : public PollingComponent, public text_sensor::TextS
   }
 
   float get_setup_priority() const override { return setup_priority::ETHERNET; }
-  std::string unique_id() override { return get_mac_address() + "-ethernetinfo"; }
   void dump_config() override;
   void add_ip_sensors(uint8_t index, text_sensor::TextSensor *s) { this->ip_sensors_[index] = s; }
 
@@ -52,7 +51,6 @@ class DNSAddressEthernetInfo : public PollingComponent, public text_sensor::Text
     }
   }
   float get_setup_priority() const override { return setup_priority::ETHERNET; }
-  std::string unique_id() override { return get_mac_address() + "-ethernetinfo-dns"; }
   void dump_config() override;
 
  protected:
@@ -63,7 +61,6 @@ class MACAddressEthernetInfo : public Component, public text_sensor::TextSensor
  public:
   void setup() override { this->publish_state(ethernet::global_eth_component->get_eth_mac_address_pretty()); }
   float get_setup_priority() const override { return setup_priority::ETHERNET; }
-  std::string unique_id() override { return get_mac_address() + "-ethernetinfo-mac"; }
   void dump_config() override;
 };
 

esphome/components/fan/fan.cpp

@@ -177,6 +177,10 @@ optional<FanRestoreState> Fan::restore_state_() {
   return {};
 }
 void Fan::save_state_() {
+  if (this->restore_mode_ == FanRestoreMode::NO_RESTORE) {
+    return;
+  }
+
   FanRestoreState state{};
   state.state = this->state;
   state.oscillating = this->oscillating;

esphome/components/gl_r01_i2c/sensor.py

@@ -1,6 +1,6 @@
 import esphome.codegen as cg
-import esphome.config_validation as cv
 from esphome.components import i2c, sensor
+import esphome.config_validation as cv
 from esphome.const import (
     CONF_ID,
     DEVICE_CLASS_DISTANCE,

esphome/components/gpio/binary_sensor/__init__.py

@@ -1,11 +1,16 @@
+import logging
+
 from esphome import pins
 import esphome.codegen as cg
 from esphome.components import binary_sensor
 import esphome.config_validation as cv
-from esphome.const import CONF_PIN
+from esphome.const import CONF_ID, CONF_NAME, CONF_NUMBER, CONF_PIN
+from esphome.core import CORE
 
 from .. import gpio_ns
 
+_LOGGER = logging.getLogger(__name__)
+
 GPIOBinarySensor = gpio_ns.class_(
     "GPIOBinarySensor", binary_sensor.BinarySensor, cg.Component
 )
@@ -41,6 +46,22 @@ async def to_code(config):
     pin = await cg.gpio_pin_expression(config[CONF_PIN])
     cg.add(var.set_pin(pin))
 
-    cg.add(var.set_use_interrupt(config[CONF_USE_INTERRUPT]))
-    if config[CONF_USE_INTERRUPT]:
+    # Check for ESP8266 GPIO16 interrupt limitation
+    # GPIO16 on ESP8266 is a special pin that doesn't support interrupts through
+    # the Arduino attachInterrupt() function. This is the only known GPIO pin
+    # across all supported platforms that has this limitation, so we handle it
+    # here instead of in the platform-specific code.
+    use_interrupt = config[CONF_USE_INTERRUPT]
+    if use_interrupt and CORE.is_esp8266 and config[CONF_PIN][CONF_NUMBER] == 16:
+        _LOGGER.warning(
+            "GPIO binary_sensor '%s': GPIO16 on ESP8266 doesn't support interrupts. "
+            "Falling back to polling mode (same as in ESPHome <2025.7). "
+            "The sensor will work exactly as before, but other pins have better "
+            "performance with interrupts.",
+            config.get(CONF_NAME, config[CONF_ID]),
+        )
+        use_interrupt = False
+
+    cg.add(var.set_use_interrupt(use_interrupt))
+    if use_interrupt:
         cg.add(var.set_interrupt_type(config[CONF_INTERRUPT_TYPE]))

esphome/components/http_request/update/http_request_update.cpp

@@ -83,7 +83,7 @@ void HttpRequestUpdate::update_task(void *params) {
     container.reset();  // Release ownership of the container's shared_ptr
 
     valid = json::parse_json(response, [this_update](JsonObject root) -> bool {
-      if (!root.containsKey("name") || !root.containsKey("version") || !root.containsKey("builds")) {
+      if (!root["name"].is<const char *>() || !root["version"].is<const char *>() || !root["builds"].is<JsonArray>()) {
         ESP_LOGE(TAG, "Manifest does not contain required fields");
         return false;
       }
@@ -91,26 +91,26 @@ void HttpRequestUpdate::update_task(void *params) {
       this_update->update_info_.latest_version = root["version"].as<std::string>();
 
       for (auto build : root["builds"].as<JsonArray>()) {
-        if (!build.containsKey("chipFamily")) {
+        if (!build["chipFamily"].is<const char *>()) {
           ESP_LOGE(TAG, "Manifest does not contain required fields");
           return false;
         }
         if (build["chipFamily"] == ESPHOME_VARIANT) {
-          if (!build.containsKey("ota")) {
+          if (!build["ota"].is<JsonObject>()) {
             ESP_LOGE(TAG, "Manifest does not contain required fields");
             return false;
           }
-          auto ota = build["ota"];
-          if (!ota.containsKey("path") || !ota.containsKey("md5")) {
+          JsonObject ota = build["ota"].as<JsonObject>();
+          if (!ota["path"].is<const char *>() || !ota["md5"].is<const char *>()) {
             ESP_LOGE(TAG, "Manifest does not contain required fields");
             return false;
           }
           this_update->update_info_.firmware_url = ota["path"].as<std::string>();
           this_update->update_info_.md5 = ota["md5"].as<std::string>();
 
-          if (ota.containsKey("summary"))
+          if (ota["summary"].is<const char *>())
             this_update->update_info_.summary = ota["summary"].as<std::string>();
-          if (ota.containsKey("release_url"))
+          if (ota["release_url"].is<const char *>())
             this_update->update_info_.release_url = ota["release_url"].as<std::string>();
 
           return true;

esphome/components/i2c/i2c_bus_esp_idf.cpp

@@ -7,6 +7,7 @@
 #include "esphome/core/hal.h"
 #include "esphome/core/helpers.h"
 #include "esphome/core/log.h"
+#include <driver/gpio.h>
 
 #if ESP_IDF_VERSION < ESP_IDF_VERSION_VAL(5, 3, 0)
 #define SOC_HP_I2C_NUM SOC_I2C_NUM
@@ -20,21 +21,72 @@ static const char *const TAG = "i2c.idf";
 void IDFI2CBus::setup() {
   ESP_LOGCONFIG(TAG, "Running setup");
   static i2c_port_t next_port = I2C_NUM_0;
-  port_ = next_port;
+  this->port_ = next_port;
+  if (this->port_ == I2C_NUM_MAX) {
+    ESP_LOGE(TAG, "No more than %u buses supported", I2C_NUM_MAX);
+    this->mark_failed();
+    return;
+  }
+
+  if (this->timeout_ > 13000) {
+    ESP_LOGW(TAG, "Using max allowed timeout: 13 ms");
+    this->timeout_ = 13000;
+  }
+
+  this->recover_();
+
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 4, 2)
+  next_port = (i2c_port_t) (next_port + 1);
+
+  i2c_master_bus_config_t bus_conf{};
+  memset(&bus_conf, 0, sizeof(bus_conf));
+  bus_conf.sda_io_num = gpio_num_t(sda_pin_);
+  bus_conf.scl_io_num = gpio_num_t(scl_pin_);
+  bus_conf.i2c_port = this->port_;
+  bus_conf.glitch_ignore_cnt = 7;
+#if SOC_LP_I2C_SUPPORTED
+  if (this->port_ < SOC_HP_I2C_NUM) {
+    bus_conf.clk_source = I2C_CLK_SRC_DEFAULT;
+  } else {
+    bus_conf.lp_source_clk = LP_I2C_SCLK_DEFAULT;
+  }
+#else
+  bus_conf.clk_source = I2C_CLK_SRC_DEFAULT;
+#endif
+  bus_conf.flags.enable_internal_pullup = sda_pullup_enabled_ || scl_pullup_enabled_;
+  esp_err_t err = i2c_new_master_bus(&bus_conf, &this->bus_);
+  if (err != ESP_OK) {
+    ESP_LOGW(TAG, "i2c_new_master_bus failed: %s", esp_err_to_name(err));
+    this->mark_failed();
+    return;
+  }
+
+  i2c_device_config_t dev_conf{};
+  memset(&dev_conf, 0, sizeof(dev_conf));
+  dev_conf.dev_addr_length = I2C_ADDR_BIT_LEN_7;
+  dev_conf.device_address = I2C_DEVICE_ADDRESS_NOT_USED;
+  dev_conf.scl_speed_hz = this->frequency_;
+  dev_conf.scl_wait_us = this->timeout_;
+  err = i2c_master_bus_add_device(this->bus_, &dev_conf, &this->dev_);
+  if (err != ESP_OK) {
+    ESP_LOGW(TAG, "i2c_master_bus_add_device failed: %s", esp_err_to_name(err));
+    this->mark_failed();
+    return;
+  }
+
+  this->initialized_ = true;
+
+  if (this->scan_) {
+    ESP_LOGV(TAG, "Scanning for devices");
+    this->i2c_scan_();
+  }
+#else
 #if SOC_HP_I2C_NUM > 1
   next_port = (next_port == I2C_NUM_0) ? I2C_NUM_1 : I2C_NUM_MAX;
 #else
   next_port = I2C_NUM_MAX;
 #endif
 
-  if (port_ == I2C_NUM_MAX) {
-    ESP_LOGE(TAG, "No more than %u buses supported", SOC_HP_I2C_NUM);
-    this->mark_failed();
-    return;
-  }
-
-  recover_();
-
   i2c_config_t conf{};
   memset(&conf, 0, sizeof(conf));
   conf.mode = I2C_MODE_MASTER;
@@ -53,11 +105,7 @@ void IDFI2CBus::setup() {
     this->mark_failed();
     return;
   }
-  if (timeout_ > 0) {  // if timeout specified in yaml:
-    if (timeout_ > 13000) {
-      ESP_LOGW(TAG, "i2c timeout of %" PRIu32 "us greater than max of 13ms on esp-idf, setting to max", timeout_);
-      timeout_ = 13000;
-    }
+  if (timeout_ > 0) {
     err = i2c_set_timeout(port_, timeout_ * 80);  // unit: APB 80MHz clock cycle
     if (err != ESP_OK) {
       ESP_LOGW(TAG, "i2c_set_timeout failed: %s", esp_err_to_name(err));
@@ -73,12 +121,15 @@ void IDFI2CBus::setup() {
     this->mark_failed();
     return;
   }
+
   initialized_ = true;
   if (this->scan_) {
     ESP_LOGV(TAG, "Scanning bus for active devices");
     this->i2c_scan_();
   }
+#endif
 }
+
 void IDFI2CBus::dump_config() {
   ESP_LOGCONFIG(TAG, "I2C Bus:");
   ESP_LOGCONFIG(TAG,
@@ -123,6 +174,74 @@ ErrorCode IDFI2CBus::readv(uint8_t address, ReadBuffer *buffers, size_t cnt) {
     ESP_LOGVV(TAG, "i2c bus not initialized!");
     return ERROR_NOT_INITIALIZED;
   }
+
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 4, 2)
+  i2c_operation_job_t jobs[cnt + 4];
+  uint8_t read = (address << 1) | I2C_MASTER_READ;
+  size_t last = 0, num = 0;
+
+  jobs[num].command = I2C_MASTER_CMD_START;
+  num++;
+
+  jobs[num].command = I2C_MASTER_CMD_WRITE;
+  jobs[num].write.ack_check = true;
+  jobs[num].write.data = &read;
+  jobs[num].write.total_bytes = 1;
+  num++;
+
+  // find the last valid index
+  for (size_t i = 0; i < cnt; i++) {
+    const auto &buf = buffers[i];
+    if (buf.len == 0) {
+      continue;
+    }
+    last = i;
+  }
+
+  for (size_t i = 0; i < cnt; i++) {
+    const auto &buf = buffers[i];
+    if (buf.len == 0) {
+      continue;
+    }
+    if (i == last) {
+      // the last byte read before stop should always be a nack,
+      // split the last read if len is larger than 1
+      if (buf.len > 1) {
+        jobs[num].command = I2C_MASTER_CMD_READ;
+        jobs[num].read.ack_value = I2C_ACK_VAL;
+        jobs[num].read.data = (uint8_t *) buf.data;
+        jobs[num].read.total_bytes = buf.len - 1;
+        num++;
+      }
+      jobs[num].command = I2C_MASTER_CMD_READ;
+      jobs[num].read.ack_value = I2C_NACK_VAL;
+      jobs[num].read.data = (uint8_t *) buf.data + buf.len - 1;
+      jobs[num].read.total_bytes = 1;
+      num++;
+    } else {
+      jobs[num].command = I2C_MASTER_CMD_READ;
+      jobs[num].read.ack_value = I2C_ACK_VAL;
+      jobs[num].read.data = (uint8_t *) buf.data;
+      jobs[num].read.total_bytes = buf.len;
+      num++;
+    }
+  }
+
+  jobs[num].command = I2C_MASTER_CMD_STOP;
+  num++;
+
+  esp_err_t err = i2c_master_execute_defined_operations(this->dev_, jobs, num, 20);
+  if (err == ESP_ERR_INVALID_STATE) {
+    ESP_LOGVV(TAG, "RX from %02X failed: not acked", address);
+    return ERROR_NOT_ACKNOWLEDGED;
+  } else if (err == ESP_ERR_TIMEOUT) {
+    ESP_LOGVV(TAG, "RX from %02X failed: timeout", address);
+    return ERROR_TIMEOUT;
+  } else if (err != ESP_OK) {
+    ESP_LOGVV(TAG, "RX from %02X failed: %s", address, esp_err_to_name(err));
+    return ERROR_UNKNOWN;
+  }
+#else
   i2c_cmd_handle_t cmd = i2c_cmd_link_create();
   esp_err_t err = i2c_master_start(cmd);
   if (err != ESP_OK) {
@@ -168,6 +287,7 @@ ErrorCode IDFI2CBus::readv(uint8_t address, ReadBuffer *buffers, size_t cnt) {
     ESP_LOGVV(TAG, "RX from %02X failed: %s", address, esp_err_to_name(err));
     return ERROR_UNKNOWN;
   }
+#endif
 
 #ifdef ESPHOME_LOG_HAS_VERY_VERBOSE
   char debug_buf[4];
@@ -185,6 +305,7 @@ ErrorCode IDFI2CBus::readv(uint8_t address, ReadBuffer *buffers, size_t cnt) {
 
   return ERROR_OK;
 }
+
 ErrorCode IDFI2CBus::writev(uint8_t address, WriteBuffer *buffers, size_t cnt, bool stop) {
   // logging is only enabled with vv level, if warnings are shown the caller
   // should log them
@@ -207,6 +328,49 @@ ErrorCode IDFI2CBus::writev(uint8_t address, WriteBuffer *buffers, size_t cnt, b
   ESP_LOGVV(TAG, "0x%02X TX %s", address, debug_hex.c_str());
 #endif
 
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 4, 2)
+  i2c_operation_job_t jobs[cnt + 3];
+  uint8_t write = (address << 1) | I2C_MASTER_WRITE;
+  size_t num = 0;
+
+  jobs[num].command = I2C_MASTER_CMD_START;
+  num++;
+
+  jobs[num].command = I2C_MASTER_CMD_WRITE;
+  jobs[num].write.ack_check = true;
+  jobs[num].write.data = &write;
+  jobs[num].write.total_bytes = 1;
+  num++;
+
+  for (size_t i = 0; i < cnt; i++) {
+    const auto &buf = buffers[i];
+    if (buf.len == 0) {
+      continue;
+    }
+    jobs[num].command = I2C_MASTER_CMD_WRITE;
+    jobs[num].write.ack_check = true;
+    jobs[num].write.data = (uint8_t *) buf.data;
+    jobs[num].write.total_bytes = buf.len;
+    num++;
+  }
+
+  if (stop) {
+    jobs[num].command = I2C_MASTER_CMD_STOP;
+    num++;
+  }
+
+  esp_err_t err = i2c_master_execute_defined_operations(this->dev_, jobs, num, 20);
+  if (err == ESP_ERR_INVALID_STATE) {
+    ESP_LOGVV(TAG, "TX to %02X failed: not acked", address);
+    return ERROR_NOT_ACKNOWLEDGED;
+  } else if (err == ESP_ERR_TIMEOUT) {
+    ESP_LOGVV(TAG, "TX to %02X failed: timeout", address);
+    return ERROR_TIMEOUT;
+  } else if (err != ESP_OK) {
+    ESP_LOGVV(TAG, "TX to %02X failed: %s", address, esp_err_to_name(err));
+    return ERROR_UNKNOWN;
+  }
+#else
   i2c_cmd_handle_t cmd = i2c_cmd_link_create();
   esp_err_t err = i2c_master_start(cmd);
   if (err != ESP_OK) {
@@ -252,6 +416,7 @@ ErrorCode IDFI2CBus::writev(uint8_t address, WriteBuffer *buffers, size_t cnt, b
     ESP_LOGVV(TAG, "TX to %02X failed: %s", address, esp_err_to_name(err));
     return ERROR_UNKNOWN;
   }
+#endif
   return ERROR_OK;
 }
 

esphome/components/i2c/i2c_bus_esp_idf.h

@@ -2,9 +2,14 @@
 
 #ifdef USE_ESP_IDF
 
-#include <driver/i2c.h>
 #include "esphome/core/component.h"
 #include "i2c_bus.h"
+#include "esp_idf_version.h"
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 4, 2)
+#include <driver/i2c_master.h>
+#else
+#include <driver/i2c.h>
+#endif
 
 namespace esphome {
 namespace i2c {
@@ -38,6 +43,10 @@ class IDFI2CBus : public InternalI2CBus, public Component {
   RecoveryCode recovery_result_;
 
  protected:
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 4, 2)
+  i2c_master_dev_handle_t dev_;
+  i2c_master_bus_handle_t bus_;
+#endif
   i2c_port_t port_;
   uint8_t sda_pin_;
   bool sda_pullup_enabled_;

esphome/components/i2s_audio/speaker/__init__.py

@@ -180,7 +180,7 @@ async def to_code(config):
     await speaker.register_speaker(var, config)
 
     if config[CONF_DAC_TYPE] == "internal":
-        cg.add(var.set_internal_dac_mode(config[CONF_CHANNEL]))
+        cg.add(var.set_internal_dac_mode(config[CONF_MODE]))
     else:
         cg.add(var.set_dout_pin(config[CONF_I2S_DOUT_PIN]))
         if use_legacy():

esphome/components/json/__init__.py

@@ -12,6 +12,6 @@ CONFIG_SCHEMA = cv.All(
 
 @coroutine_with_priority(1.0)
 async def to_code(config):
-    cg.add_library("bblanchon/ArduinoJson", "6.18.5")
+    cg.add_library("bblanchon/ArduinoJson", "7.4.2")
     cg.add_define("USE_JSON")
     cg.add_global(json_ns.using)

esphome/components/json/json_util.cpp

@@ -1,83 +1,76 @@
 #include "json_util.h"
 #include "esphome/core/log.h"
 
+// ArduinoJson::Allocator is included via ArduinoJson.h in json_util.h
+
 namespace esphome {
 namespace json {
 
 static const char *const TAG = "json";
 
-static std::vector<char> global_json_build_buffer;  // NOLINT
-static const auto ALLOCATOR = RAMAllocator<uint8_t>(RAMAllocator<uint8_t>::ALLOC_INTERNAL);
+// Build an allocator for the JSON Library using the RAMAllocator class
+struct SpiRamAllocator : ArduinoJson::Allocator {
+  void *allocate(size_t size) override { return this->allocator_.allocate(size); }
+
+  void deallocate(void *pointer) override {
+    // ArduinoJson's Allocator interface doesn't provide the size parameter in deallocate.
+    // RAMAllocator::deallocate() requires the size, which we don't have access to here.
+    // RAMAllocator::deallocate implementation just calls free() regardless of whether
+    // the memory was allocated with heap_caps_malloc or malloc.
+    // This is safe because ESP-IDF's heap implementation internally tracks the memory region
+    // and routes free() to the appropriate heap.
+    free(pointer);  // NOLINT(cppcoreguidelines-owning-memory,cppcoreguidelines-no-malloc)
+  }
+
+  void *reallocate(void *ptr, size_t new_size) override {
+    return this->allocator_.reallocate(static_cast<uint8_t *>(ptr), new_size);
+  }
+
+ protected:
+  RAMAllocator<uint8_t> allocator_{RAMAllocator<uint8_t>(RAMAllocator<uint8_t>::NONE)};
+};
 
 std::string build_json(const json_build_t &f) {
-  // Here we are allocating up to 5kb of memory,
-  // with the heap size minus 2kb to be safe if less than 5kb
-  // as we can not have a true dynamic sized document.
-  // The excess memory is freed below with `shrinkToFit()`
-  auto free_heap = ALLOCATOR.get_max_free_block_size();
-  size_t request_size = std::min(free_heap, (size_t) 512);
-  while (true) {
-    ESP_LOGV(TAG, "Attempting to allocate %zu bytes for JSON serialization", request_size);
-    DynamicJsonDocument json_document(request_size);
-    if (json_document.capacity() == 0) {
-      ESP_LOGE(TAG, "Could not allocate memory for document! Requested %zu bytes, largest free heap block: %zu bytes",
-               request_size, free_heap);
-      return "{}";
-    }
-    JsonObject root = json_document.to<JsonObject>();
-    f(root);
-    if (json_document.overflowed()) {
-      if (request_size == free_heap) {
-        ESP_LOGE(TAG, "Could not allocate memory for document! Overflowed largest free heap block: %zu bytes",
-                 free_heap);
-        return "{}";
-      }
-      request_size = std::min(request_size * 2, free_heap);
-      continue;
-    }
-    json_document.shrinkToFit();
-    ESP_LOGV(TAG, "Size after shrink %zu bytes", json_document.capacity());
-    std::string output;
-    serializeJson(json_document, output);
-    return output;
+  // NOLINTBEGIN(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
+  auto doc_allocator = SpiRamAllocator();
+  JsonDocument json_document(&doc_allocator);
+  if (json_document.overflowed()) {
+    ESP_LOGE(TAG, "Could not allocate memory for JSON document!");
+    return "{}";
   }
+  JsonObject root = json_document.to<JsonObject>();
+  f(root);
+  if (json_document.overflowed()) {
+    ESP_LOGE(TAG, "Could not allocate memory for JSON document!");
+    return "{}";
+  }
+  std::string output;
+  serializeJson(json_document, output);
+  return output;
+  // NOLINTEND(clang-analyzer-cplusplus.NewDeleteLeaks)
 }
 
 bool parse_json(const std::string &data, const json_parse_t &f) {
-  // Here we are allocating 1.5 times the data size,
-  // with the heap size minus 2kb to be safe if less than that
-  // as we can not have a true dynamic sized document.
-  // The excess memory is freed below with `shrinkToFit()`
-  auto free_heap = ALLOCATOR.get_max_free_block_size();
-  size_t request_size = std::min(free_heap, (size_t) (data.size() * 1.5));
-  while (true) {
-    DynamicJsonDocument json_document(request_size);
-    if (json_document.capacity() == 0) {
-      ESP_LOGE(TAG, "Could not allocate memory for document! Requested %zu bytes, free heap: %zu", request_size,
-               free_heap);
-      return false;
-    }
-    DeserializationError err = deserializeJson(json_document, data);
-    json_document.shrinkToFit();
+  // NOLINTBEGIN(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
+  auto doc_allocator = SpiRamAllocator();
+  JsonDocument json_document(&doc_allocator);
+  if (json_document.overflowed()) {
+    ESP_LOGE(TAG, "Could not allocate memory for JSON document!");
+    return false;
+  }
+  DeserializationError err = deserializeJson(json_document, data);
 
-    JsonObject root = json_document.as<JsonObject>();
+  JsonObject root = json_document.as<JsonObject>();
 
-    if (err == DeserializationError::Ok) {
-      return f(root);
-    } else if (err == DeserializationError::NoMemory) {
-      if (request_size * 2 >= free_heap) {
-        ESP_LOGE(TAG, "Can not allocate more memory for deserialization. Consider making source string smaller");
-        return false;
-      }
-      ESP_LOGV(TAG, "Increasing memory allocation.");
-      request_size *= 2;
-      continue;
-    } else {
-      ESP_LOGE(TAG, "Parse error: %s", err.c_str());
-      return false;
-    }
-  };
+  if (err == DeserializationError::Ok) {
+    return f(root);
+  } else if (err == DeserializationError::NoMemory) {
+    ESP_LOGE(TAG, "Can not allocate more memory for deserialization. Consider making source string smaller");
+    return false;
+  }
+  ESP_LOGE(TAG, "Parse error: %s", err.c_str());
   return false;
+  // NOLINTEND(clang-analyzer-cplusplus.NewDeleteLeaks)
 }
 
 }  // namespace json

esphome/components/ld2410/ld2410.cpp

@@ -178,13 +178,8 @@ static constexpr uint8_t NO_MAC[] = {0x08, 0x05, 0x04, 0x03, 0x02, 0x01};
 
 static inline int two_byte_to_int(char firstbyte, char secondbyte) { return (int16_t) (secondbyte << 8) + firstbyte; }
 
-static bool validate_header_footer(const uint8_t *header_footer, const uint8_t *buffer) {
-  for (uint8_t i = 0; i < HEADER_FOOTER_SIZE; i++) {
-    if (header_footer[i] != buffer[i]) {
-      return false;  // Mismatch in header/footer
-    }
-  }
-  return true;  // Valid header/footer
+static inline bool validate_header_footer(const uint8_t *header_footer, const uint8_t *buffer) {
+  return std::memcmp(header_footer, buffer, HEADER_FOOTER_SIZE) == 0;
 }
 
 void LD2410Component::dump_config() {
@@ -300,14 +295,12 @@ void LD2410Component::send_command_(uint8_t command, const uint8_t *command_valu
   if (command_value != nullptr) {
     len += command_value_len;
   }
-  uint8_t len_cmd[] = {lowbyte(len), highbyte(len), command, 0x00};
+  // 2 length bytes (low, high) + 2 command bytes (low, high)
+  uint8_t len_cmd[] = {len, 0x00, command, 0x00};
   this->write_array(len_cmd, sizeof(len_cmd));
-
   // command value bytes
   if (command_value != nullptr) {
-    for (uint8_t i = 0; i < command_value_len; i++) {
-      this->write_byte(command_value[i]);
-    }
+    this->write_array(command_value, command_value_len);
   }
   // frame footer bytes
   this->write_array(CMD_FRAME_FOOTER, sizeof(CMD_FRAME_FOOTER));
@@ -401,7 +394,7 @@ void LD2410Component::handle_periodic_data_() {
     /*
       Moving distance range: 18th byte
       Still distance range: 19th byte
-      Moving enery: 20~28th bytes
+      Moving energy: 20~28th bytes
     */
     for (std::vector<sensor::Sensor *>::size_type i = 0; i != this->gate_move_sensors_.size(); i++) {
       sensor::Sensor *s = this->gate_move_sensors_[i];
@@ -480,7 +473,7 @@ bool LD2410Component::handle_ack_data_() {
     ESP_LOGE(TAG, "Invalid status");
     return true;
   }
-  if (ld2410::two_byte_to_int(this->buffer_data_[8], this->buffer_data_[9]) != 0x00) {
+  if (this->buffer_data_[8] || this->buffer_data_[9]) {
     ESP_LOGW(TAG, "Invalid command: %02X, %02X", this->buffer_data_[8], this->buffer_data_[9]);
     return true;
   }
@@ -534,8 +527,8 @@ bool LD2410Component::handle_ack_data_() {
       const auto *light_function_str = find_str(LIGHT_FUNCTIONS_BY_UINT, this->light_function_);
       const auto *out_pin_level_str = find_str(OUT_PIN_LEVELS_BY_UINT, this->out_pin_level_);
       ESP_LOGV(TAG,
-               "Light function is: %s\n"
-               "Light threshold is: %u\n"
+               "Light function: %s\n"
+               "Light threshold: %u\n"
                "Out pin level: %s",
                light_function_str, this->light_threshold_, out_pin_level_str);
 #ifdef USE_SELECT
@@ -600,7 +593,7 @@ bool LD2410Component::handle_ack_data_() {
       break;
 
     case CMD_QUERY: {  // Query parameters response
-      if (this->buffer_data_[10] != 0xAA)
+      if (this->buffer_data_[10] != HEADER)
         return true;  // value head=0xAA
 #ifdef USE_NUMBER
       /*
@@ -656,17 +649,11 @@ void LD2410Component::readline_(int readch) {
   if (this->buffer_pos_ < 4) {
     return;  // Not enough data to process yet
   }
-  if (this->buffer_data_[this->buffer_pos_ - 4] == DATA_FRAME_FOOTER[0] &&
-      this->buffer_data_[this->buffer_pos_ - 3] == DATA_FRAME_FOOTER[1] &&
-      this->buffer_data_[this->buffer_pos_ - 2] == DATA_FRAME_FOOTER[2] &&
-      this->buffer_data_[this->buffer_pos_ - 1] == DATA_FRAME_FOOTER[3]) {
+  if (ld2410::validate_header_footer(DATA_FRAME_FOOTER, &this->buffer_data_[this->buffer_pos_ - 4])) {
     ESP_LOGV(TAG, "Handling Periodic Data: %s", format_hex_pretty(this->buffer_data_, this->buffer_pos_).c_str());
     this->handle_periodic_data_();
     this->buffer_pos_ = 0;  // Reset position index for next message
-  } else if (this->buffer_data_[this->buffer_pos_ - 4] == CMD_FRAME_FOOTER[0] &&
-             this->buffer_data_[this->buffer_pos_ - 3] == CMD_FRAME_FOOTER[1] &&
-             this->buffer_data_[this->buffer_pos_ - 2] == CMD_FRAME_FOOTER[2] &&
-             this->buffer_data_[this->buffer_pos_ - 1] == CMD_FRAME_FOOTER[3]) {
+  } else if (ld2410::validate_header_footer(CMD_FRAME_FOOTER, &this->buffer_data_[this->buffer_pos_ - 4])) {
     ESP_LOGV(TAG, "Handling Ack Data: %s", format_hex_pretty(this->buffer_data_, this->buffer_pos_).c_str());
     if (this->handle_ack_data_()) {
       this->buffer_pos_ = 0;  // Reset position index for next message
@@ -772,7 +759,6 @@ void LD2410Component::set_max_distances_timeout() {
                        0x00};
   this->set_config_mode_(true);
   this->send_command_(CMD_MAXDIST_DURATION, value, sizeof(value));
-  delay(50);  // NOLINT
   this->query_parameters_();
   this->set_timeout(200, [this]() { this->restart_and_read_all_info(); });
   this->set_config_mode_(false);
@@ -802,7 +788,6 @@ void LD2410Component::set_gate_threshold(uint8_t gate) {
                        0x01, 0x00, lowbyte(motion), highbyte(motion), 0x00, 0x00,
                        0x02, 0x00, lowbyte(still),  highbyte(still),  0x00, 0x00};
   this->send_command_(CMD_GATE_SENS, value, sizeof(value));
-  delay(50);  // NOLINT
   this->query_parameters_();
   this->set_config_mode_(false);
 }
@@ -833,7 +818,6 @@ void LD2410Component::set_light_out_control() {
   this->set_config_mode_(true);
   uint8_t value[4] = {this->light_function_, this->light_threshold_, this->out_pin_level_, 0x00};
   this->send_command_(CMD_SET_LIGHT_CONTROL, value, sizeof(value));
-  delay(50);  // NOLINT
   this->query_light_control_();
   this->set_timeout(200, [this]() { this->restart_and_read_all_info(); });
   this->set_config_mode_(false);

esphome/components/ld2420/binary_sensor/ld2420_binary_sensor.cpp

@@ -5,10 +5,10 @@
 namespace esphome {
 namespace ld2420 {
 
-static const char *const TAG = "LD2420.binary_sensor";
+static const char *const TAG = "ld2420.binary_sensor";
 
 void LD2420BinarySensor::dump_config() {
-  ESP_LOGCONFIG(TAG, "LD2420 BinarySensor:");
+  ESP_LOGCONFIG(TAG, "Binary Sensor:");
   LOG_BINARY_SENSOR("  ", "Presence", this->presence_bsensor_);
 }
 

esphome/components/ld2420/button/reconfig_buttons.cpp

@@ -2,7 +2,7 @@
 #include "esphome/core/helpers.h"
 #include "esphome/core/log.h"
 
-static const char *const TAG = "LD2420.button";
+static const char *const TAG = "ld2420.button";
 
 namespace esphome {
 namespace ld2420 {

esphome/components/ld2420/ld2420.cpp

@@ -137,7 +137,7 @@ static const std::string OP_SIMPLE_MODE_STRING = "Simple";
 // Memory-efficient lookup tables
 struct StringToUint8 {
   const char *str;
-  uint8_t value;
+  const uint8_t value;
 };
 
 static constexpr StringToUint8 OP_MODE_BY_STR[] = {
@@ -155,8 +155,9 @@ static constexpr const char *ERR_MESSAGE[] = {
 // Helper function for lookups
 template<size_t N> uint8_t find_uint8(const StringToUint8 (&arr)[N], const std::string &str) {
   for (const auto &entry : arr) {
-    if (str == entry.str)
+    if (str == entry.str) {
       return entry.value;
+    }
   }
   return 0xFF;  // Not found
 }
@@ -326,15 +327,8 @@ void LD2420Component::revert_config_action() {
 
 void LD2420Component::loop() {
   // If there is a active send command do not process it here, the send command call will handle it.
-  if (!this->get_cmd_active_()) {
-    if (!this->available())
-      return;
-    static uint8_t buffer[2048];
-    static uint8_t rx_data;
-    while (this->available()) {
-      rx_data = this->read();
-      this->readline_(rx_data, buffer, sizeof(buffer));
-    }
+  while (!this->cmd_active_ && this->available()) {
+    this->readline_(this->read(), this->buffer_data_, MAX_LINE_LENGTH);
   }
 }
 
@@ -365,8 +359,9 @@ void LD2420Component::auto_calibrate_sensitivity() {
 
     // Store average and peak values
     this->gate_avg[gate] = sum / CALIBRATE_SAMPLES;
-    if (this->gate_peak[gate] < peak)
+    if (this->gate_peak[gate] < peak) {
       this->gate_peak[gate] = peak;
+    }
 
     uint32_t calculated_value =
         (static_cast<uint32_t>(this->gate_peak[gate]) + (move_factor * static_cast<uint32_t>(this->gate_peak[gate])));
@@ -403,8 +398,9 @@ void LD2420Component::set_operating_mode(const std::string &state) {
       }
     } else {
       // Set the current data back so we don't have new data that can be applied in error.
-      if (this->get_calibration_())
+      if (this->get_calibration_()) {
         memcpy(&this->new_config, &this->current_config, sizeof(this->current_config));
+      }
       this->set_calibration_(false);
     }
   } else {
@@ -414,30 +410,32 @@ void LD2420Component::set_operating_mode(const std::string &state) {
 }
 
 void LD2420Component::readline_(int rx_data, uint8_t *buffer, int len) {
-  static int pos = 0;
-
-  if (rx_data >= 0) {
-    if (pos < len - 1) {
-      buffer[pos++] = rx_data;
-      buffer[pos] = 0;
-    } else {
-      pos = 0;
-    }
-    if (pos >= 4) {
-      if (memcmp(&buffer[pos - 4], &CMD_FRAME_FOOTER, sizeof(CMD_FRAME_FOOTER)) == 0) {
-        this->set_cmd_active_(false);  // Set command state to inactive after responce.
-        this->handle_ack_data_(buffer, pos);
-        pos = 0;
-      } else if ((buffer[pos - 2] == 0x0D && buffer[pos - 1] == 0x0A) &&
-                 (this->get_mode_() == CMD_SYSTEM_MODE_SIMPLE)) {
-        this->handle_simple_mode_(buffer, pos);
-        pos = 0;
-      } else if ((memcmp(&buffer[pos - 4], &ENERGY_FRAME_FOOTER, sizeof(ENERGY_FRAME_FOOTER)) == 0) &&
-                 (this->get_mode_() == CMD_SYSTEM_MODE_ENERGY)) {
-        this->handle_energy_mode_(buffer, pos);
-        pos = 0;
-      }
-    }
+  if (rx_data < 0) {
+    return;  // No data available
+  }
+  if (this->buffer_pos_ < len - 1) {
+    buffer[this->buffer_pos_++] = rx_data;
+    buffer[this->buffer_pos_] = 0;
+  } else {
+    // We should never get here, but just in case...
+    ESP_LOGW(TAG, "Max command length exceeded; ignoring");
+    this->buffer_pos_ = 0;
+  }
+  if (this->buffer_pos_ < 4) {
+    return;  // Not enough data to process yet
+  }
+  if (memcmp(&buffer[this->buffer_pos_ - 4], &CMD_FRAME_FOOTER, sizeof(CMD_FRAME_FOOTER)) == 0) {
+    this->cmd_active_ = false;  // Set command state to inactive after response
+    this->handle_ack_data_(buffer, this->buffer_pos_);
+    this->buffer_pos_ = 0;
+  } else if ((buffer[this->buffer_pos_ - 2] == 0x0D && buffer[this->buffer_pos_ - 1] == 0x0A) &&
+             (this->get_mode_() == CMD_SYSTEM_MODE_SIMPLE)) {
+    this->handle_simple_mode_(buffer, this->buffer_pos_);
+    this->buffer_pos_ = 0;
+  } else if ((memcmp(&buffer[this->buffer_pos_ - 4], &ENERGY_FRAME_FOOTER, sizeof(ENERGY_FRAME_FOOTER)) == 0) &&
+             (this->get_mode_() == CMD_SYSTEM_MODE_ENERGY)) {
+    this->handle_energy_mode_(buffer, this->buffer_pos_);
+    this->buffer_pos_ = 0;
   }
 }
 
@@ -462,8 +460,9 @@ void LD2420Component::handle_energy_mode_(uint8_t *buffer, int len) {
 
   // Resonable refresh rate for home assistant database size health
   const int32_t current_millis = App.get_loop_component_start_time();
-  if (current_millis - this->last_periodic_millis < REFRESH_RATE_MS)
+  if (current_millis - this->last_periodic_millis < REFRESH_RATE_MS) {
     return;
+  }
   this->last_periodic_millis = current_millis;
   for (auto &listener : this->listeners_) {
     listener->on_distance(this->get_distance_());
@@ -506,14 +505,16 @@ void LD2420Component::handle_simple_mode_(const uint8_t *inbuf, int len) {
     }
   }
   outbuf[index] = '\0';
-  if (index > 1)
+  if (index > 1) {
     this->set_distance_(strtol(outbuf, &endptr, 10));
+  }
 
   if (this->get_mode_() == CMD_SYSTEM_MODE_SIMPLE) {
     // Resonable refresh rate for home assistant database size health
     const int32_t current_millis = App.get_loop_component_start_time();
-    if (current_millis - this->last_normal_periodic_millis < REFRESH_RATE_MS)
+    if (current_millis - this->last_normal_periodic_millis < REFRESH_RATE_MS) {
       return;
+    }
     this->last_normal_periodic_millis = current_millis;
     for (auto &listener : this->listeners_)
       listener->on_distance(this->get_distance_());
@@ -593,11 +594,12 @@ void LD2420Component::handle_ack_data_(uint8_t *buffer, int len) {
 int LD2420Component::send_cmd_from_array(CmdFrameT frame) {
   uint32_t start_millis = millis();
   uint8_t error = 0;
-  uint8_t ack_buffer[64];
-  uint8_t cmd_buffer[64];
+  uint8_t ack_buffer[MAX_LINE_LENGTH];
+  uint8_t cmd_buffer[MAX_LINE_LENGTH];
   this->cmd_reply_.ack = false;
-  if (frame.command != CMD_RESTART)
-    this->set_cmd_active_(true);  // Restart does not reply, thus no ack state required.
+  if (frame.command != CMD_RESTART) {
+    this->cmd_active_ = true;
+  }  // Restart does not reply, thus no ack state required
   uint8_t retry = 3;
   while (retry) {
     frame.length = 0;
@@ -619,9 +621,7 @@ int LD2420Component::send_cmd_from_array(CmdFrameT frame) {
 
     memcpy(cmd_buffer + frame.length, &frame.footer, sizeof(frame.footer));
     frame.length += sizeof(frame.footer);
-    for (uint16_t index = 0; index < frame.length; index++) {
-      this->write_byte(cmd_buffer[index]);
-    }
+    this->write_array(cmd_buffer, frame.length);
 
     error = 0;
     if (frame.command == CMD_RESTART) {
@@ -630,7 +630,7 @@ int LD2420Component::send_cmd_from_array(CmdFrameT frame) {
 
     while (!this->cmd_reply_.ack) {
       while (this->available()) {
-        this->readline_(read(), ack_buffer, sizeof(ack_buffer));
+        this->readline_(this->read(), ack_buffer, sizeof(ack_buffer));
       }
       delay_microseconds_safe(1450);
       // Wait on an Rx from the LD2420 for up to 3 1 second loops, otherwise it could trigger a WDT.
@@ -641,10 +641,12 @@ int LD2420Component::send_cmd_from_array(CmdFrameT frame) {
         break;
       }
     }
-    if (this->cmd_reply_.ack)
+    if (this->cmd_reply_.ack) {
       retry = 0;
-    if (this->cmd_reply_.error > 0)
+    }
+    if (this->cmd_reply_.error > 0) {
       this->handle_cmd_error(error);
+    }
   }
   return error;
 }
@@ -764,8 +766,9 @@ void LD2420Component::set_system_mode(uint16_t mode) {
   cmd_frame.data_length += sizeof(unknown_parm);
   cmd_frame.footer = CMD_FRAME_FOOTER;
   ESP_LOGV(TAG, "Sending write system mode command: %2X", cmd_frame.command);
-  if (this->send_cmd_from_array(cmd_frame) == 0)
+  if (this->send_cmd_from_array(cmd_frame) == 0) {
     this->set_mode_(mode);
+  }
 }
 
 void LD2420Component::get_firmware_version_() {
@@ -840,18 +843,24 @@ void LD2420Component::set_gate_threshold(uint8_t gate) {
 
 #ifdef USE_NUMBER
 void LD2420Component::init_gate_config_numbers() {
-  if (this->gate_timeout_number_ != nullptr)
+  if (this->gate_timeout_number_ != nullptr) {
     this->gate_timeout_number_->publish_state(static_cast<uint16_t>(this->current_config.timeout));
-  if (this->gate_select_number_ != nullptr)
+  }
+  if (this->gate_select_number_ != nullptr) {
     this->gate_select_number_->publish_state(0);
-  if (this->min_gate_distance_number_ != nullptr)
+  }
+  if (this->min_gate_distance_number_ != nullptr) {
     this->min_gate_distance_number_->publish_state(static_cast<uint16_t>(this->current_config.min_gate));
-  if (this->max_gate_distance_number_ != nullptr)
+  }
+  if (this->max_gate_distance_number_ != nullptr) {
     this->max_gate_distance_number_->publish_state(static_cast<uint16_t>(this->current_config.max_gate));
-  if (this->gate_move_sensitivity_factor_number_ != nullptr)
+  }
+  if (this->gate_move_sensitivity_factor_number_ != nullptr) {
     this->gate_move_sensitivity_factor_number_->publish_state(this->gate_move_sensitivity_factor);
-  if (this->gate_still_sensitivity_factor_number_ != nullptr)
+  }
+  if (this->gate_still_sensitivity_factor_number_ != nullptr) {
     this->gate_still_sensitivity_factor_number_->publish_state(this->gate_still_sensitivity_factor);
+  }
   for (uint8_t gate = 0; gate < TOTAL_GATES; gate++) {
     if (this->gate_still_threshold_numbers_[gate] != nullptr) {
       this->gate_still_threshold_numbers_[gate]->publish_state(

esphome/components/ld2420/ld2420.h

@@ -20,8 +20,9 @@
 namespace esphome {
 namespace ld2420 {
 
-static const uint8_t TOTAL_GATES = 16;
 static const uint8_t CALIBRATE_SAMPLES = 64;
+static const uint8_t MAX_LINE_LENGTH = 46;  // Max characters for serial buffer
+static const uint8_t TOTAL_GATES = 16;
 
 enum OpMode : uint8_t {
   OP_NORMAL_MODE = 1,
@@ -118,10 +119,10 @@ class LD2420Component : public Component, public uart::UARTDevice {
 
   float gate_move_sensitivity_factor{0.5};
   float gate_still_sensitivity_factor{0.5};
-  int32_t last_periodic_millis = millis();
-  int32_t report_periodic_millis = millis();
-  int32_t monitor_periodic_millis = millis();
-  int32_t last_normal_periodic_millis = millis();
+  int32_t last_periodic_millis{0};
+  int32_t report_periodic_millis{0};
+  int32_t monitor_periodic_millis{0};
+  int32_t last_normal_periodic_millis{0};
   uint16_t radar_data[TOTAL_GATES][CALIBRATE_SAMPLES];
   uint16_t gate_avg[TOTAL_GATES];
   uint16_t gate_peak[TOTAL_GATES];
@@ -161,8 +162,6 @@ class LD2420Component : public Component, public uart::UARTDevice {
   void set_presence_(bool presence) { this->presence_ = presence; };
   uint16_t get_distance_() { return this->distance_; };
   void set_distance_(uint16_t distance) { this->distance_ = distance; };
-  bool get_cmd_active_() { return this->cmd_active_; };
-  void set_cmd_active_(bool active) { this->cmd_active_ = active; };
   void handle_simple_mode_(const uint8_t *inbuf, int len);
   void handle_energy_mode_(uint8_t *buffer, int len);
   void handle_ack_data_(uint8_t *buffer, int len);
@@ -181,12 +180,11 @@ class LD2420Component : public Component, public uart::UARTDevice {
   std::vector<number::Number *> gate_move_threshold_numbers_ = std::vector<number::Number *>(16);
 #endif
 
-  uint32_t max_distance_gate_;
-  uint32_t min_distance_gate_;
+  uint16_t distance_{0};
   uint16_t system_mode_;
   uint16_t gate_energy_[TOTAL_GATES];
-  uint16_t distance_{0};
-  uint8_t config_checksum_{0};
+  uint8_t buffer_pos_{0};  // where to resume processing/populating buffer
+  uint8_t buffer_data_[MAX_LINE_LENGTH];
   char firmware_ver_[8]{"v0.0.0"};
   bool cmd_active_{false};
   bool presence_{false};

esphome/components/ld2420/number/gate_config_number.cpp

@@ -2,7 +2,7 @@
 #include "esphome/core/helpers.h"
 #include "esphome/core/log.h"
 
-static const char *const TAG = "LD2420.number";
+static const char *const TAG = "ld2420.number";
 
 namespace esphome {
 namespace ld2420 {

esphome/components/ld2420/select/operating_mode_select.cpp

@@ -5,7 +5,7 @@
 namespace esphome {
 namespace ld2420 {
 
-static const char *const TAG = "LD2420.select";
+static const char *const TAG = "ld2420.select";
 
 void LD2420Select::control(const std::string &value) {
   this->publish_state(value);

esphome/components/ld2420/sensor/ld2420_sensor.cpp

@@ -5,10 +5,10 @@
 namespace esphome {
 namespace ld2420 {
 
-static const char *const TAG = "LD2420.sensor";
+static const char *const TAG = "ld2420.sensor";
 
 void LD2420Sensor::dump_config() {
-  ESP_LOGCONFIG(TAG, "LD2420 Sensor:");
+  ESP_LOGCONFIG(TAG, "Sensor:");
   LOG_SENSOR("  ", "Distance", this->distance_sensor_);
 }
 

esphome/components/ld2420/text_sensor/text_sensor.cpp

@@ -5,10 +5,10 @@
 namespace esphome {
 namespace ld2420 {
 
-static const char *const TAG = "LD2420.text_sensor";
+static const char *const TAG = "ld2420.text_sensor";
 
 void LD2420TextSensor::dump_config() {
-  ESP_LOGCONFIG(TAG, "LD2420 TextSensor:");
+  ESP_LOGCONFIG(TAG, "Text Sensor:");
   LOG_TEXT_SENSOR("  ", "Firmware", this->fw_version_text_sensor_);
 }
 

esphome/components/libretiny/__init__.py

@@ -268,7 +268,7 @@ async def component_to_code(config):
 
     # disable library compatibility checks
     cg.add_platformio_option("lib_ldf_mode", "off")
-    cg.add_platformio_option("lib_compat_mode", "strict")
+    cg.add_platformio_option("lib_compat_mode", "soft")
     # include <Arduino.h> in every file
     cg.add_platformio_option("build_src_flags", "-include Arduino.h")
     # dummy version code

esphome/components/light/light_json_schema.cpp

@@ -9,6 +9,7 @@ namespace light {
 // See https://www.home-assistant.io/integrations/light.mqtt/#json-schema for documentation on the schema
 
 void LightJSONSchema::dump_json(LightState &state, JsonObject root) {
+  // NOLINTNEXTLINE(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
   if (state.supports_effects())
     root["effect"] = state.get_effect_name();
 
@@ -52,7 +53,7 @@ void LightJSONSchema::dump_json(LightState &state, JsonObject root) {
   if (values.get_color_mode() & ColorCapability::BRIGHTNESS)
     root["brightness"] = uint8_t(values.get_brightness() * 255);
 
-  JsonObject color = root.createNestedObject("color");
+  JsonObject color = root["color"].to<JsonObject>();
   if (values.get_color_mode() & ColorCapability::RGB) {
     color["r"] = uint8_t(values.get_color_brightness() * values.get_red() * 255);
     color["g"] = uint8_t(values.get_color_brightness() * values.get_green() * 255);
@@ -73,7 +74,7 @@ void LightJSONSchema::dump_json(LightState &state, JsonObject root) {
 }
 
 void LightJSONSchema::parse_color_json(LightState &state, LightCall &call, JsonObject root) {
-  if (root.containsKey("state")) {
+  if (root["state"].is<const char *>()) {
     auto val = parse_on_off(root["state"]);
     switch (val) {
       case PARSE_ON:
@@ -90,40 +91,40 @@ void LightJSONSchema::parse_color_json(LightState &state, LightCall &call, JsonO
     }
   }
 
-  if (root.containsKey("brightness")) {
+  if (root["brightness"].is<uint8_t>()) {
     call.set_brightness(float(root["brightness"]) / 255.0f);
   }
 
-  if (root.containsKey("color")) {
+  if (root["color"].is<JsonObject>()) {
     JsonObject color = root["color"];
     // HA also encodes brightness information in the r, g, b values, so extract that and set it as color brightness.
     float max_rgb = 0.0f;
-    if (color.containsKey("r")) {
+    if (color["r"].is<uint8_t>()) {
       float r = float(color["r"]) / 255.0f;
       max_rgb = fmaxf(max_rgb, r);
       call.set_red(r);
     }
-    if (color.containsKey("g")) {
+    if (color["g"].is<uint8_t>()) {
       float g = float(color["g"]) / 255.0f;
       max_rgb = fmaxf(max_rgb, g);
       call.set_green(g);
     }
-    if (color.containsKey("b")) {
+    if (color["b"].is<uint8_t>()) {
       float b = float(color["b"]) / 255.0f;
       max_rgb = fmaxf(max_rgb, b);
       call.set_blue(b);
     }
-    if (color.containsKey("r") || color.containsKey("g") || color.containsKey("b")) {
+    if (color["r"].is<uint8_t>() || color["g"].is<uint8_t>() || color["b"].is<uint8_t>()) {
       call.set_color_brightness(max_rgb);
     }
 
-    if (color.containsKey("c")) {
+    if (color["c"].is<uint8_t>()) {
       call.set_cold_white(float(color["c"]) / 255.0f);
     }
-    if (color.containsKey("w")) {
+    if (color["w"].is<uint8_t>()) {
       // the HA scheme is ambiguous here, the same key is used for white channel in RGBW and warm
       // white channel in RGBWW.
-      if (color.containsKey("c")) {
+      if (color["c"].is<uint8_t>()) {
         call.set_warm_white(float(color["w"]) / 255.0f);
       } else {
         call.set_white(float(color["w"]) / 255.0f);
@@ -131,11 +132,11 @@ void LightJSONSchema::parse_color_json(LightState &state, LightCall &call, JsonO
     }
   }
 
-  if (root.containsKey("white_value")) {  // legacy API
+  if (root["white_value"].is<uint8_t>()) {  // legacy API
     call.set_white(float(root["white_value"]) / 255.0f);
   }
 
-  if (root.containsKey("color_temp")) {
+  if (root["color_temp"].is<uint16_t>()) {
     call.set_color_temperature(float(root["color_temp"]));
   }
 }
@@ -143,17 +144,17 @@ void LightJSONSchema::parse_color_json(LightState &state, LightCall &call, JsonO
 void LightJSONSchema::parse_json(LightState &state, LightCall &call, JsonObject root) {
   LightJSONSchema::parse_color_json(state, call, root);
 
-  if (root.containsKey("flash")) {
+  if (root["flash"].is<uint32_t>()) {
     auto length = uint32_t(float(root["flash"]) * 1000);
     call.set_flash_length(length);
   }
 
-  if (root.containsKey("transition")) {
+  if (root["transition"].is<uint16_t>()) {
     auto length = uint32_t(float(root["transition"]) * 1000);
     call.set_transition_length(length);
   }
 
-  if (root.containsKey("effect")) {
+  if (root["effect"].is<const char *>()) {
     const char *effect = root["effect"];
     call.set_effect(effect);
   }

esphome/components/logger/__init__.py

@@ -21,6 +21,11 @@ from esphome.components.libretiny.const import (
     COMPONENT_LN882X,
     COMPONENT_RTL87XX,
 )
+from esphome.components.zephyr import (
+    zephyr_add_cdc_acm,
+    zephyr_add_overlay,
+    zephyr_add_prj_conf,
+)
 from esphome.config_helpers import filter_source_files_from_platform
 import esphome.config_validation as cv
 from esphome.const import (
@@ -41,6 +46,7 @@ from esphome.const import (
     PLATFORM_ESP32,
     PLATFORM_ESP8266,
     PLATFORM_LN882X,
+    PLATFORM_NRF52,
     PLATFORM_RP2040,
     PLATFORM_RTL87XX,
     PlatformFramework,
@@ -115,6 +121,8 @@ ESP_ARDUINO_UNSUPPORTED_USB_UARTS = [USB_SERIAL_JTAG]
 
 UART_SELECTION_RP2040 = [USB_CDC, UART0, UART1]
 
+UART_SELECTION_NRF52 = [USB_CDC, UART0]
+
 HARDWARE_UART_TO_UART_SELECTION = {
     UART0: logger_ns.UART_SELECTION_UART0,
     UART0_SWAP: logger_ns.UART_SELECTION_UART0_SWAP,
@@ -167,6 +175,8 @@ def uart_selection(value):
             return cv.one_of(*UART_SELECTION_LIBRETINY[component], upper=True)(value)
     if CORE.is_host:
         raise cv.Invalid("Uart selection not valid for host platform")
+    if CORE.is_nrf52:
+        return cv.one_of(*UART_SELECTION_NRF52, upper=True)(value)
     raise NotImplementedError
 
 
@@ -186,6 +196,7 @@ LoggerMessageTrigger = logger_ns.class_(
     automation.Trigger.template(cg.int_, cg.const_char_ptr, cg.const_char_ptr),
 )
 
+
 CONF_ESP8266_STORE_LOG_STRINGS_IN_FLASH = "esp8266_store_log_strings_in_flash"
 CONFIG_SCHEMA = cv.All(
     cv.Schema(
@@ -227,6 +238,7 @@ CONFIG_SCHEMA = cv.All(
                 bk72xx=DEFAULT,
                 ln882x=DEFAULT,
                 rtl87xx=DEFAULT,
+                nrf52=USB_CDC,
             ): cv.All(
                 cv.only_on(
                     [
@@ -236,6 +248,7 @@ CONFIG_SCHEMA = cv.All(
                         PLATFORM_BK72XX,
                         PLATFORM_LN882X,
                         PLATFORM_RTL87XX,
+                        PLATFORM_NRF52,
                     ]
                 ),
                 uart_selection,
@@ -358,6 +371,15 @@ async def to_code(config):
     except cv.Invalid:
         pass
 
+    if CORE.using_zephyr:
+        if config[CONF_HARDWARE_UART] == UART0:
+            zephyr_add_overlay("""&uart0 { status = "okay";};""")
+        if config[CONF_HARDWARE_UART] == UART1:
+            zephyr_add_overlay("""&uart1 { status = "okay";};""")
+        if config[CONF_HARDWARE_UART] == USB_CDC:
+            zephyr_add_prj_conf("UART_LINE_CTRL", True)
+            zephyr_add_cdc_acm(config, 0)
+
     # Register at end for safe mode
     await cg.register_component(log, config)
 
@@ -462,6 +484,7 @@ FILTER_SOURCE_FILES = filter_source_files_from_platform(
             PlatformFramework.RTL87XX_ARDUINO,
             PlatformFramework.LN882X_ARDUINO,
         },
+        "logger_zephyr.cpp": {PlatformFramework.NRF52_ZEPHYR},
         "task_log_buffer.cpp": {
             PlatformFramework.ESP32_ARDUINO,
             PlatformFramework.ESP32_IDF,

esphome/components/logger/logger.cpp

@@ -4,9 +4,9 @@
 #include <memory>  // For unique_ptr
 #endif
 
+#include "esphome/core/application.h"
 #include "esphome/core/hal.h"
 #include "esphome/core/log.h"
-#include "esphome/core/application.h"
 
 namespace esphome {
 namespace logger {
@@ -160,6 +160,8 @@ Logger::Logger(uint32_t baud_rate, size_t tx_buffer_size) : baud_rate_(baud_rate
   this->tx_buffer_ = new char[this->tx_buffer_size_ + 1];  // NOLINT
 #if defined(USE_ESP32) || defined(USE_LIBRETINY)
   this->main_task_ = xTaskGetCurrentTaskHandle();
+#elif defined(USE_ZEPHYR)
+  this->main_task_ = k_current_get();
 #endif
 }
 #ifdef USE_ESPHOME_TASK_LOG_BUFFER
@@ -172,6 +174,7 @@ void Logger::init_log_buffer(size_t total_buffer_size) {
 }
 #endif
 
+#ifndef USE_ZEPHYR
 #if defined(USE_LOGGER_USB_CDC) || defined(USE_ESP32)
 void Logger::loop() {
 #if defined(USE_LOGGER_USB_CDC) && defined(USE_ARDUINO)
@@ -185,8 +188,13 @@ void Logger::loop() {
     }
     opened = !opened;
   }
+#endif
+  this->process_messages_();
+}
+#endif
 #endif
 
+void Logger::process_messages_() {
 #ifdef USE_ESPHOME_TASK_LOG_BUFFER
   // Process any buffered messages when available
   if (this->log_buffer_->has_messages()) {
@@ -227,12 +235,11 @@ void Logger::loop() {
   }
 #endif
 }
-#endif
 
 void Logger::set_baud_rate(uint32_t baud_rate) { this->baud_rate_ = baud_rate; }
 void Logger::set_log_level(const std::string &tag, uint8_t log_level) { this->log_levels_[tag] = log_level; }
 
-#if defined(USE_ESP32) || defined(USE_ESP8266) || defined(USE_RP2040) || defined(USE_LIBRETINY)
+#if defined(USE_ESP32) || defined(USE_ESP8266) || defined(USE_RP2040) || defined(USE_LIBRETINY) || defined(USE_ZEPHYR)
 UARTSelection Logger::get_uart() const { return this->uart_; }
 #endif
 

esphome/components/logger/logger.h

@@ -29,6 +29,11 @@
 #include <driver/uart.h>
 #endif  // USE_ESP_IDF
 
+#ifdef USE_ZEPHYR
+#include <zephyr/kernel.h>
+struct device;
+#endif
+
 namespace esphome {
 
 namespace logger {
@@ -56,7 +61,7 @@ static const char *const LOG_LEVEL_LETTERS[] = {
     "VV",  // VERY_VERBOSE
 };
 
-#if defined(USE_ESP32) || defined(USE_ESP8266) || defined(USE_RP2040) || defined(USE_LIBRETINY)
+#if defined(USE_ESP32) || defined(USE_ESP8266) || defined(USE_RP2040) || defined(USE_LIBRETINY) || defined(USE_ZEPHYR)
 /** Enum for logging UART selection
  *
  * Advanced configuration (pin selection, etc) is not supported.
@@ -82,7 +87,7 @@ enum UARTSelection : uint8_t {
   UART_SELECTION_UART0_SWAP,
 #endif  // USE_ESP8266
 };
-#endif  // USE_ESP32 || USE_ESP8266 || USE_RP2040 || USE_LIBRETINY
+#endif  // USE_ESP32 || USE_ESP8266 || USE_RP2040 || USE_LIBRETINY || USE_ZEPHYR
 
 /**
  * @brief Logger component for all ESPHome logging.
@@ -107,7 +112,7 @@ class Logger : public Component {
 #ifdef USE_ESPHOME_TASK_LOG_BUFFER
   void init_log_buffer(size_t total_buffer_size);
 #endif
-#if defined(USE_LOGGER_USB_CDC) || defined(USE_ESP32)
+#if defined(USE_LOGGER_USB_CDC) || defined(USE_ESP32) || defined(USE_ZEPHYR)
   void loop() override;
 #endif
   /// Manually set the baud rate for serial, set to 0 to disable.
@@ -122,7 +127,7 @@ class Logger : public Component {
 #ifdef USE_ESP32
   void create_pthread_key() { pthread_key_create(&log_recursion_key_, nullptr); }
 #endif
-#if defined(USE_ESP32) || defined(USE_ESP8266) || defined(USE_RP2040) || defined(USE_LIBRETINY)
+#if defined(USE_ESP32) || defined(USE_ESP8266) || defined(USE_RP2040) || defined(USE_LIBRETINY) || defined(USE_ZEPHYR)
   void set_uart_selection(UARTSelection uart_selection) { uart_ = uart_selection; }
   /// Get the UART used by the logger.
   UARTSelection get_uart() const;
@@ -157,6 +162,7 @@ class Logger : public Component {
 #endif
 
  protected:
+  void process_messages_();
   void write_msg_(const char *msg);
 
   // Format a log message with printf-style arguments and write it to a buffer with header, footer, and null terminator
@@ -164,7 +170,7 @@ class Logger : public Component {
   inline void HOT format_log_to_buffer_with_terminator_(uint8_t level, const char *tag, int line, const char *format,
                                                         va_list args, char *buffer, uint16_t *buffer_at,
                                                         uint16_t buffer_size) {
-#if defined(USE_ESP32) || defined(USE_LIBRETINY)
+#if defined(USE_ESP32) || defined(USE_LIBRETINY) || defined(USE_ZEPHYR)
     this->write_header_to_buffer_(level, tag, line, this->get_thread_name_(), buffer, buffer_at, buffer_size);
 #else
     this->write_header_to_buffer_(level, tag, line, nullptr, buffer, buffer_at, buffer_size);
@@ -231,7 +237,10 @@ class Logger : public Component {
 #ifdef USE_ARDUINO
   Stream *hw_serial_{nullptr};
 #endif
-#if defined(USE_ESP32) || defined(USE_LIBRETINY)
+#if defined(USE_ZEPHYR)
+  const device *uart_dev_{nullptr};
+#endif
+#if defined(USE_ESP32) || defined(USE_LIBRETINY) || defined(USE_ZEPHYR)
   void *main_task_ = nullptr;  // Only used for thread name identification
 #endif
 #ifdef USE_ESP32
@@ -256,7 +265,7 @@ class Logger : public Component {
   uint16_t tx_buffer_at_{0};
   uint16_t tx_buffer_size_{0};
   uint8_t current_level_{ESPHOME_LOG_LEVEL_VERY_VERBOSE};
-#if defined(USE_ESP32) || defined(USE_ESP8266) || defined(USE_RP2040)
+#if defined(USE_ESP32) || defined(USE_ESP8266) || defined(USE_RP2040) || defined(USE_ZEPHYR)
   UARTSelection uart_{UART_SELECTION_UART0};
 #endif
 #ifdef USE_LIBRETINY
@@ -268,9 +277,13 @@ class Logger : public Component {
   bool global_recursion_guard_{false};  // Simple global recursion guard for single-task platforms
 #endif
 
-#if defined(USE_ESP32) || defined(USE_LIBRETINY)
+#if defined(USE_ESP32) || defined(USE_LIBRETINY) || defined(USE_ZEPHYR)
   const char *HOT get_thread_name_() {
+#ifdef USE_ZEPHYR
+    k_tid_t current_task = k_current_get();
+#else
     TaskHandle_t current_task = xTaskGetCurrentTaskHandle();
+#endif
     if (current_task == main_task_) {
       return nullptr;  // Main task
     } else {
@@ -278,6 +291,8 @@ class Logger : public Component {
       return pcTaskGetName(current_task);
 #elif defined(USE_LIBRETINY)
       return pcTaskGetTaskName(current_task);
+#elif defined(USE_ZEPHYR)
+      return k_thread_name_get(current_task);
 #endif
     }
   }
@@ -319,7 +334,7 @@ class Logger : public Component {
     const char *color = esphome::logger::LOG_LEVEL_COLORS[level];
     const char *letter = esphome::logger::LOG_LEVEL_LETTERS[level];
 
-#if defined(USE_ESP32) || defined(USE_LIBRETINY)
+#if defined(USE_ESP32) || defined(USE_LIBRETINY) || defined(USE_ZEPHYR)
     if (thread_name != nullptr) {
       // Non-main task with thread name
       this->printf_to_buffer_(buffer, buffer_at, buffer_size, "%s[%s][%s:%03u]%s[%s]%s: ", color, letter, tag, line,

esphome/components/logger/logger_zephyr.cpp

@@ -0,0 +1,88 @@
+#ifdef USE_ZEPHYR
+
+#include "esphome/core/application.h"
+#include "esphome/core/log.h"
+#include "logger.h"
+
+#include <zephyr/device.h>
+#include <zephyr/drivers/uart.h>
+#include <zephyr/usb/usb_device.h>
+
+namespace esphome {
+namespace logger {
+
+static const char *const TAG = "logger";
+
+void Logger::loop() {
+#ifdef USE_LOGGER_USB_CDC
+  if (this->uart_ != UART_SELECTION_USB_CDC || nullptr == this->uart_dev_) {
+    return;
+  }
+  static bool opened = false;
+  uint32_t dtr = 0;
+  uart_line_ctrl_get(this->uart_dev_, UART_LINE_CTRL_DTR, &dtr);
+
+  /* Poll if the DTR flag was set, optional */
+  if (opened == dtr) {
+    return;
+  }
+
+  if (!opened) {
+    App.schedule_dump_config();
+  }
+  opened = !opened;
+#endif
+  this->process_messages_();
+}
+
+void Logger::pre_setup() {
+  if (this->baud_rate_ > 0) {
+    static const struct device *uart_dev = nullptr;
+    switch (this->uart_) {
+      case UART_SELECTION_UART0:
+        uart_dev = DEVICE_DT_GET_OR_NULL(DT_NODELABEL(uart0));
+        break;
+      case UART_SELECTION_UART1:
+        uart_dev = DEVICE_DT_GET_OR_NULL(DT_NODELABEL(uart1));
+        break;
+#ifdef USE_LOGGER_USB_CDC
+      case UART_SELECTION_USB_CDC:
+        uart_dev = DEVICE_DT_GET_OR_NULL(DT_NODELABEL(cdc_acm_uart0));
+        if (device_is_ready(uart_dev)) {
+          usb_enable(nullptr);
+        }
+        break;
+#endif
+    }
+    if (!device_is_ready(uart_dev)) {
+      ESP_LOGE(TAG, "%s is not ready.", get_uart_selection_());
+    } else {
+      this->uart_dev_ = uart_dev;
+    }
+  }
+  global_logger = this;
+  ESP_LOGI(TAG, "Log initialized");
+}
+
+void HOT Logger::write_msg_(const char *msg) {
+#ifdef CONFIG_PRINTK
+  printk("%s\n", msg);
+#endif
+  if (nullptr == this->uart_dev_) {
+    return;
+  }
+  while (*msg) {
+    uart_poll_out(this->uart_dev_, *msg);
+    ++msg;
+  }
+  uart_poll_out(this->uart_dev_, '\n');
+}
+
+const char *const UART_SELECTIONS[] = {"UART0", "UART1", "USB_CDC"};
+
+const char *Logger::get_uart_selection_() { return UART_SELECTIONS[this->uart_]; }
+
+}  // namespace logger
+}  // namespace esphome
+
+#endif

esphome/components/lps22/sensor.py

@@ -1,16 +1,16 @@
 import esphome.codegen as cg
-import esphome.config_validation as cv
 from esphome.components import i2c, sensor
+import esphome.config_validation as cv
 from esphome.const import (
     CONF_ID,
-    CONF_TEMPERATURE,
     CONF_PRESSURE,
+    CONF_TEMPERATURE,
+    DEVICE_CLASS_PRESSURE,
+    DEVICE_CLASS_TEMPERATURE,
+    ICON_THERMOMETER,
     STATE_CLASS_MEASUREMENT,
     UNIT_CELSIUS,
     UNIT_HECTOPASCAL,
-    ICON_THERMOMETER,
-    DEVICE_CLASS_TEMPERATURE,
-    DEVICE_CLASS_PRESSURE,
 )
 
 CODEOWNERS = ["@nagisa"]

esphome/components/lvgl/styles.py

@@ -76,6 +76,7 @@ async def theme_to_code(config):
         for w_name, style in theme.items():
             # Work around Python 3.10 bug with nested async comprehensions
             # With Python 3.11 this could be simplified
+            # TODO: Now that we require Python 3.11+, this can be updated to use nested comprehensions
             styles = {}
             for part, states in collect_parts(style).items():
                 styles[part] = {

esphome/components/lvgl/widgets/meter.py

@@ -29,9 +29,9 @@ from ..defines import (
 )
 from ..helpers import add_lv_use, lvgl_components_required
 from ..lv_validation import (
-    angle,
     get_end_value,
     get_start_value,
+    lv_angle,
     lv_bool,
     lv_color,
     lv_float,
@@ -162,7 +162,7 @@ SCALE_SCHEMA = cv.Schema(
         cv.Optional(CONF_RANGE_FROM, default=0.0): cv.float_,
         cv.Optional(CONF_RANGE_TO, default=100.0): cv.float_,
         cv.Optional(CONF_ANGLE_RANGE, default=270): cv.int_range(0, 360),
-        cv.Optional(CONF_ROTATION): angle,
+        cv.Optional(CONF_ROTATION): lv_angle,
         cv.Optional(CONF_INDICATORS): cv.ensure_list(INDICATOR_SCHEMA),
     }
 )
@@ -187,7 +187,7 @@ class MeterType(WidgetType):
         for scale_conf in config.get(CONF_SCALES, ()):
             rotation = 90 + (360 - scale_conf[CONF_ANGLE_RANGE]) / 2
             if CONF_ROTATION in scale_conf:
-                rotation = scale_conf[CONF_ROTATION] // 10
+                rotation = await lv_angle.process(scale_conf[CONF_ROTATION])
             with LocalVariable(
                 "meter_var", "lv_meter_scale_t", lv_expr.meter_add_scale(var)
             ) as meter_var:
@@ -205,21 +205,20 @@ class MeterType(WidgetType):
                         var,
                         meter_var,
                         ticks[CONF_COUNT],
-                        ticks[CONF_WIDTH],
-                        ticks[CONF_LENGTH],
+                        await size.process(ticks[CONF_WIDTH]),
+                        await size.process(ticks[CONF_LENGTH]),
                         color,
                     )
                     if CONF_MAJOR in ticks:
                         major = ticks[CONF_MAJOR]
-                        color = await lv_color.process(major[CONF_COLOR])
                         lv.meter_set_scale_major_ticks(
                             var,
                             meter_var,
                             major[CONF_STRIDE],
-                            major[CONF_WIDTH],
-                            major[CONF_LENGTH],
-                            color,
-                            major[CONF_LABEL_GAP],
+                            await size.process(major[CONF_WIDTH]),
+                            await size.process(major[CONF_LENGTH]),
+                            await lv_color.process(major[CONF_COLOR]),
+                            await size.process(major[CONF_LABEL_GAP]),
                         )
                 for indicator in scale_conf.get(CONF_INDICATORS, ()):
                     (t, v) = next(iter(indicator.items()))
@@ -233,7 +232,11 @@ class MeterType(WidgetType):
                         lv_assign(
                             ivar,
                             lv_expr.meter_add_needle_line(
-                                var, meter_var, v[CONF_WIDTH], color, v[CONF_R_MOD]
+                                var,
+                                meter_var,
+                                await size.process(v[CONF_WIDTH]),
+                                color,
+                                await size.process(v[CONF_R_MOD]),
                             ),
                         )
                     if t == CONF_ARC:
@@ -241,7 +244,11 @@ class MeterType(WidgetType):
                         lv_assign(
                             ivar,
                             lv_expr.meter_add_arc(
-                                var, meter_var, v[CONF_WIDTH], color, v[CONF_R_MOD]
+                                var,
+                                meter_var,
+                                await size.process(v[CONF_WIDTH]),
+                                color,
+                                await size.process(v[CONF_R_MOD]),
                             ),
                         )
                     if t == CONF_TICK_STYLE:
@@ -257,7 +264,7 @@ class MeterType(WidgetType):
                                 color_start,
                                 color_end,
                                 v[CONF_LOCAL],
-                                v[CONF_WIDTH],
+                                size.process(v[CONF_WIDTH]),
                             ),
                         )
                     if t == CONF_IMAGE:

esphome/components/mipi_spi/__init__.py

@@ -2,10 +2,8 @@ CODEOWNERS = ["@clydebarrow"]
 
 DOMAIN = "mipi_spi"
 
-CONF_DRAW_FROM_ORIGIN = "draw_from_origin"
 CONF_SPI_16 = "spi_16"
 CONF_PIXEL_MODE = "pixel_mode"
-CONF_COLOR_DEPTH = "color_depth"
 CONF_BUS_MODE = "bus_mode"
 CONF_USE_AXIS_FLIPS = "use_axis_flips"
 CONF_NATIVE_WIDTH = "native_width"

esphome/components/mipi_spi/display.py

@@ -3,11 +3,18 @@ import logging
 from esphome import pins
 import esphome.codegen as cg
 from esphome.components import display, spi
+from esphome.components.const import (
+    CONF_BYTE_ORDER,
+    CONF_COLOR_DEPTH,
+    CONF_DRAW_ROUNDING,
+)
+from esphome.components.display import CONF_SHOW_TEST_CARD, DISPLAY_ROTATIONS
 from esphome.components.spi import TYPE_OCTAL, TYPE_QUAD, TYPE_SINGLE
 import esphome.config_validation as cv
 from esphome.config_validation import ALLOW_EXTRA
 from esphome.const import (
     CONF_BRIGHTNESS,
+    CONF_BUFFER_SIZE,
     CONF_COLOR_ORDER,
     CONF_CS_PIN,
     CONF_DATA_RATE,
@@ -24,19 +31,19 @@ from esphome.const import (
     CONF_MODEL,
     CONF_OFFSET_HEIGHT,
     CONF_OFFSET_WIDTH,
+    CONF_PAGES,
     CONF_RESET_PIN,
     CONF_ROTATION,
     CONF_SWAP_XY,
     CONF_TRANSFORM,
     CONF_WIDTH,
 )
-from esphome.core import TimePeriod
+from esphome.core import CORE, TimePeriod
+from esphome.cpp_generator import TemplateArguments
+from esphome.final_validate import full_config
 
-from ..const import CONF_DRAW_ROUNDING
-from ..lvgl.defines import CONF_COLOR_DEPTH
 from . import (
     CONF_BUS_MODE,
-    CONF_DRAW_FROM_ORIGIN,
     CONF_NATIVE_HEIGHT,
     CONF_NATIVE_WIDTH,
     CONF_PIXEL_MODE,
@@ -55,6 +62,7 @@ from .models import (
     MADCTL_XFLIP,
     MADCTL_YFLIP,
     DriverChip,
+    adafruit,
     amoled,
     cyd,
     ili,
@@ -69,43 +77,112 @@ DEPENDENCIES = ["spi"]
 
 LOGGER = logging.getLogger(DOMAIN)
 mipi_spi_ns = cg.esphome_ns.namespace("mipi_spi")
-MipiSpi = mipi_spi_ns.class_(
-    "MipiSpi", display.Display, display.DisplayBuffer, cg.Component, spi.SPIDevice
+MipiSpi = mipi_spi_ns.class_("MipiSpi", display.Display, cg.Component, spi.SPIDevice)
+MipiSpiBuffer = mipi_spi_ns.class_(
+    "MipiSpiBuffer", MipiSpi, display.Display, cg.Component, spi.SPIDevice
 )
 ColorOrder = display.display_ns.enum("ColorMode")
 ColorBitness = display.display_ns.enum("ColorBitness")
 Model = mipi_spi_ns.enum("Model")
 
+PixelMode = mipi_spi_ns.enum("PixelMode")
+BusType = mipi_spi_ns.enum("BusType")
+
 COLOR_ORDERS = {
     MODE_RGB: ColorOrder.COLOR_ORDER_RGB,
     MODE_BGR: ColorOrder.COLOR_ORDER_BGR,
 }
 
 COLOR_DEPTHS = {
-    8: ColorBitness.COLOR_BITNESS_332,
-    16: ColorBitness.COLOR_BITNESS_565,
+    8: PixelMode.PIXEL_MODE_8,
+    16: PixelMode.PIXEL_MODE_16,
+    18: PixelMode.PIXEL_MODE_18,
 }
+
 DATA_PIN_SCHEMA = pins.internal_gpio_output_pin_schema
 
+BusTypes = {
+    TYPE_SINGLE: BusType.BUS_TYPE_SINGLE,
+    TYPE_QUAD: BusType.BUS_TYPE_QUAD,
+    TYPE_OCTAL: BusType.BUS_TYPE_OCTAL,
+}
 
-DriverChip("CUSTOM", initsequence={})
+DriverChip("CUSTOM")
 
 MODELS = DriverChip.models
-# These statements are noops, but serve to suppress linting of side-effect-only imports
-for _ in (ili, jc, amoled, lilygo, lanbon, cyd, waveshare):
+# This loop is a noop, but suppresses linting of side-effect-only imports
+for _ in (ili, jc, amoled, lilygo, lanbon, cyd, waveshare, adafruit):
     pass
 
-PixelMode = mipi_spi_ns.enum("PixelMode")
 
-PIXEL_MODE_18BIT = "18bit"
-PIXEL_MODE_16BIT = "16bit"
+DISPLAY_18BIT = "18bit"
+DISPLAY_16BIT = "16bit"
 
-PIXEL_MODES = {
-    PIXEL_MODE_16BIT: 0x55,
-    PIXEL_MODE_18BIT: 0x66,
+DISPLAY_PIXEL_MODES = {
+    DISPLAY_16BIT: (0x55, PixelMode.PIXEL_MODE_16),
+    DISPLAY_18BIT: (0x66, PixelMode.PIXEL_MODE_18),
 }
 
 
+def get_dimensions(config):
+    if CONF_DIMENSIONS in config:
+        # Explicit dimensions, just use as is
+        dimensions = config[CONF_DIMENSIONS]
+        if isinstance(dimensions, dict):
+            width = dimensions[CONF_WIDTH]
+            height = dimensions[CONF_HEIGHT]
+            offset_width = dimensions[CONF_OFFSET_WIDTH]
+            offset_height = dimensions[CONF_OFFSET_HEIGHT]
+            return width, height, offset_width, offset_height
+        (width, height) = dimensions
+        return width, height, 0, 0
+
+    # Default dimensions, use model defaults
+    transform = get_transform(config)
+
+    model = MODELS[config[CONF_MODEL]]
+    width = model.get_default(CONF_WIDTH)
+    height = model.get_default(CONF_HEIGHT)
+    offset_width = model.get_default(CONF_OFFSET_WIDTH, 0)
+    offset_height = model.get_default(CONF_OFFSET_HEIGHT, 0)
+
+    # if mirroring axes and there are offsets, also mirror the offsets to cater for situations where
+    # the offset is asymmetric
+    if transform[CONF_MIRROR_X]:
+        native_width = model.get_default(CONF_NATIVE_WIDTH, width + offset_width * 2)
+        offset_width = native_width - width - offset_width
+    if transform[CONF_MIRROR_Y]:
+        native_height = model.get_default(
+            CONF_NATIVE_HEIGHT, height + offset_height * 2
+        )
+        offset_height = native_height - height - offset_height
+    # Swap default dimensions if swap_xy is set
+    if transform[CONF_SWAP_XY] is True:
+        width, height = height, width
+        offset_height, offset_width = offset_width, offset_height
+    return width, height, offset_width, offset_height
+
+
+def denominator(config):
+    """
+    Calculate the best denominator for a buffer size fraction.
+    The denominator must be a number between 2 and 16 that divides the display height evenly,
+    and the fraction represented by the denominator must be less than or equal to the given fraction.
+    :config: The configuration dictionary containing the buffer size fraction and display dimensions
+    :return: The denominator to use for the buffer size fraction
+    """
+    frac = config.get(CONF_BUFFER_SIZE)
+    if frac is None or frac > 0.75:
+        return 1
+    height, _width, _offset_width, _offset_height = get_dimensions(config)
+    try:
+        return next(x for x in range(2, 17) if frac >= 1 / x and height % x == 0)
+    except StopIteration:
+        raise cv.Invalid(
+            f"Buffer size fraction {frac} is not compatible with display height {height}"
+        ) from StopIteration
+
+
 def validate_dimension(rounding):
     def validator(value):
         value = cv.positive_int(value)
@@ -158,41 +235,50 @@ def dimension_schema(rounding):
     )
 
 
-def model_schema(bus_mode, model: DriverChip, swapsies: bool):
+def swap_xy_schema(model):
+    uses_swap = model.get_default(CONF_SWAP_XY, None) != cv.UNDEFINED
+
+    def validator(value):
+        if value:
+            raise cv.Invalid("Axis swapping not supported by this model")
+        return cv.boolean(value)
+
+    if uses_swap:
+        return {cv.Required(CONF_SWAP_XY): cv.boolean}
+    return {cv.Optional(CONF_SWAP_XY, default=False): validator}
+
+
+def model_schema(config):
+    model = MODELS[config[CONF_MODEL]]
+    bus_mode = config.get(CONF_BUS_MODE, model.modes[0])
     transform = cv.Schema(
         {
             cv.Required(CONF_MIRROR_X): cv.boolean,
             cv.Required(CONF_MIRROR_Y): cv.boolean,
+            **swap_xy_schema(model),
         }
     )
-    if model.get_default(CONF_SWAP_XY, False) == cv.UNDEFINED:
-        transform = transform.extend(
-            {
-                cv.Optional(CONF_SWAP_XY): cv.invalid(
-                    "Axis swapping not supported by this model"
-                )
-            }
-        )
-    else:
-        transform = transform.extend(
-            {
-                cv.Required(CONF_SWAP_XY): cv.boolean,
-            }
-        )
     # CUSTOM model will need to provide a custom init sequence
     iseqconf = (
         cv.Required(CONF_INIT_SEQUENCE)
         if model.initsequence is None
         else cv.Optional(CONF_INIT_SEQUENCE)
     )
-    # Dimensions are optional if the model has a default width and the transform is not overridden
+    # Dimensions are optional if the model has a default width and the x-y transform is not overridden
+    is_swapped = config.get(CONF_TRANSFORM, {}).get(CONF_SWAP_XY) is True
     cv_dimensions = (
-        cv.Optional if model.get_default(CONF_WIDTH) and not swapsies else cv.Required
+        cv.Optional if model.get_default(CONF_WIDTH) and not is_swapped else cv.Required
     )
-    pixel_modes = PIXEL_MODES if bus_mode == TYPE_SINGLE else (PIXEL_MODE_16BIT,)
+    pixel_modes = DISPLAY_PIXEL_MODES if bus_mode == TYPE_SINGLE else (DISPLAY_16BIT,)
     color_depth = (
         ("16", "8", "16bit", "8bit") if bus_mode == TYPE_SINGLE else ("16", "16bit")
     )
+    other_options = [
+        CONF_INVERT_COLORS,
+        CONF_USE_AXIS_FLIPS,
+    ]
+    if bus_mode == TYPE_SINGLE:
+        other_options.append(CONF_SPI_16)
     schema = (
         display.FULL_DISPLAY_SCHEMA.extend(
             spi.spi_device_schema(
@@ -220,11 +306,13 @@ def model_schema(bus_mode, model: DriverChip, swapsies: bool):
                 model.option(CONF_COLOR_ORDER, MODE_BGR): cv.enum(
                     COLOR_ORDERS, upper=True
                 ),
+                model.option(CONF_BYTE_ORDER, "big_endian"): cv.one_of(
+                    "big_endian", "little_endian", lower=True
+                ),
                 model.option(CONF_COLOR_DEPTH, 16): cv.one_of(*color_depth, lower=True),
                 model.option(CONF_DRAW_ROUNDING, 2): power_of_two,
-                model.option(CONF_PIXEL_MODE, PIXEL_MODE_16BIT): cv.Any(
-                    cv.one_of(*pixel_modes, lower=True),
-                    cv.int_range(0, 255, min_included=True, max_included=True),
+                model.option(CONF_PIXEL_MODE, DISPLAY_16BIT): cv.one_of(
+                    *pixel_modes, lower=True
                 ),
                 cv.Optional(CONF_TRANSFORM): transform,
                 cv.Optional(CONF_BUS_MODE, default=bus_mode): cv.one_of(
@@ -232,19 +320,12 @@ def model_schema(bus_mode, model: DriverChip, swapsies: bool):
                 ),
                 cv.Required(CONF_MODEL): cv.one_of(model.name, upper=True),
                 iseqconf: cv.ensure_list(map_sequence),
+                cv.Optional(CONF_BUFFER_SIZE): cv.All(
+                    cv.percentage, cv.Range(0.12, 1.0)
+                ),
             }
         )
-        .extend(
-            {
-                model.option(x): cv.boolean
-                for x in [
-                    CONF_DRAW_FROM_ORIGIN,
-                    CONF_SPI_16,
-                    CONF_INVERT_COLORS,
-                    CONF_USE_AXIS_FLIPS,
-                ]
-            }
-        )
+        .extend({model.option(x): cv.boolean for x in other_options})
     )
     if brightness := model.get_default(CONF_BRIGHTNESS):
         schema = schema.extend(
@@ -259,18 +340,25 @@ def model_schema(bus_mode, model: DriverChip, swapsies: bool):
     return schema
 
 
-def rotation_as_transform(model, config):
+def is_rotation_transformable(config):
     """
     Check if a rotation can be implemented in hardware using the MADCTL register.
     A rotation of 180 is always possible, 90 and 270 are possible if the model supports swapping X and Y.
     """
+    model = MODELS[config[CONF_MODEL]]
     rotation = config.get(CONF_ROTATION, 0)
     return rotation and (
         model.get_default(CONF_SWAP_XY) != cv.UNDEFINED or rotation == 180
     )
 
 
-def config_schema(config):
+def customise_schema(config):
+    """
+    Create a customised config schema for a specific model and validate the configuration.
+    :param config: The configuration dictionary to validate
+    :return: The validated configuration dictionary
+    :raises cv.Invalid: If the configuration is invalid
+    """
     # First get the model and bus mode
     config = cv.Schema(
         {
@@ -288,29 +376,94 @@ def config_schema(config):
         extra=ALLOW_EXTRA,
     )(config)
     bus_mode = config.get(CONF_BUS_MODE, model.modes[0])
-    swapsies = config.get(CONF_TRANSFORM, {}).get(CONF_SWAP_XY) is True
-    config = model_schema(bus_mode, model, swapsies)(config)
+    config = model_schema(config)(config)
     # Check for invalid combinations of MADCTL config
     if init_sequence := config.get(CONF_INIT_SEQUENCE):
-        if MADCTL in [x[0] for x in init_sequence] and CONF_TRANSFORM in config:
+        commands = [x[0] for x in init_sequence]
+        if MADCTL in commands and CONF_TRANSFORM in config:
             raise cv.Invalid(
                 f"transform is not supported when MADCTL ({MADCTL:#X}) is in the init sequence"
             )
+        if PIXFMT in commands:
+            raise cv.Invalid(
+                f"PIXFMT ({PIXFMT:#X}) should not be in the init sequence, it will be set automatically"
+            )
 
     if bus_mode == TYPE_QUAD and CONF_DC_PIN in config:
         raise cv.Invalid("DC pin is not supported in quad mode")
-    if config[CONF_PIXEL_MODE] == PIXEL_MODE_18BIT and bus_mode != TYPE_SINGLE:
-        raise cv.Invalid("18-bit pixel mode is not supported on a quad or octal bus")
     if bus_mode != TYPE_QUAD and CONF_DC_PIN not in config:
         raise cv.Invalid(f"DC pin is required in {bus_mode} mode")
+    denominator(config)
     return config
 
 
-CONFIG_SCHEMA = config_schema
+CONFIG_SCHEMA = customise_schema
 
 
-def get_transform(model, config):
-    can_transform = rotation_as_transform(model, config)
+def requires_buffer(config):
+    """
+    Check if the display configuration requires a buffer. It will do so if any drawing methods are configured.
+    :param config:
+    :return:  True if a buffer is required, False otherwise
+    """
+    return any(
+        config.get(key) for key in (CONF_LAMBDA, CONF_PAGES, CONF_SHOW_TEST_CARD)
+    )
+
+
+def get_color_depth(config):
+    return int(config[CONF_COLOR_DEPTH].removesuffix("bit"))
+
+
+def _final_validate(config):
+    global_config = full_config.get()
+
+    from esphome.components.lvgl import DOMAIN as LVGL_DOMAIN
+
+    if not requires_buffer(config) and LVGL_DOMAIN not in global_config:
+        # If no drawing methods are configured, and LVGL is not enabled, show a test card
+        config[CONF_SHOW_TEST_CARD] = True
+
+    if "psram" not in global_config and CONF_BUFFER_SIZE not in config:
+        if not requires_buffer(config):
+            return config  # No buffer needed, so no need to set a buffer size
+        # If PSRAM is not enabled, choose a small buffer size by default
+        if not requires_buffer(config):
+            # not our problem.
+            return config
+        color_depth = get_color_depth(config)
+        frac = denominator(config)
+        height, width, _offset_width, _offset_height = get_dimensions(config)
+
+        buffer_size = color_depth // 8 * width * height // frac
+        # Target a buffer size of 20kB
+        fraction = 20000.0 / buffer_size
+        try:
+            config[CONF_BUFFER_SIZE] = 1.0 / next(
+                x for x in range(2, 17) if fraction >= 1 / x and height % x == 0
+            )
+        except StopIteration:
+            # Either the screen is too big, or the height is not divisible by any of the fractions, so use 1.0
+            # PSRAM will be needed.
+            if CORE.is_esp32:
+                raise cv.Invalid(
+                    "PSRAM is required for this display"
+                ) from StopIteration
+
+    return config
+
+
+FINAL_VALIDATE_SCHEMA = _final_validate
+
+
+def get_transform(config):
+    """
+    Get the transformation configuration for the display.
+    :param config:
+    :return:
+    """
+    model = MODELS[config[CONF_MODEL]]
+    can_transform = is_rotation_transformable(config)
     transform = config.get(
         CONF_TRANSFORM,
         {
@@ -350,16 +503,13 @@ def get_sequence(model, config):
     sequence = [x if isinstance(x, tuple) else (x,) for x in sequence]
     commands = [x[0] for x in sequence]
     # Set pixel format if not already in the custom sequence
-    if PIXFMT not in commands:
-        pixel_mode = config[CONF_PIXEL_MODE]
-        if not isinstance(pixel_mode, int):
-            pixel_mode = PIXEL_MODES[pixel_mode]
-        sequence.append((PIXFMT, pixel_mode))
+    pixel_mode = DISPLAY_PIXEL_MODES[config[CONF_PIXEL_MODE]]
+    sequence.append((PIXFMT, pixel_mode[0]))
     # Does the chip use the flipping bits for mirroring rather than the reverse order bits?
     use_flip = config[CONF_USE_AXIS_FLIPS]
     if MADCTL not in commands:
         madctl = 0
-        transform = get_transform(model, config)
+        transform = get_transform(config)
         if transform.get(CONF_TRANSFORM):
             LOGGER.info("Using hardware transform to implement rotation")
         if transform.get(CONF_MIRROR_X):
@@ -396,63 +546,62 @@ def get_sequence(model, config):
     )
 
 
+def get_instance(config):
+    """
+    Get the type of MipiSpi instance to create based on the configuration,
+    and the template arguments.
+    :param config:
+    :return: type, template arguments
+    """
+    width, height, offset_width, offset_height = get_dimensions(config)
+
+    color_depth = int(config[CONF_COLOR_DEPTH].removesuffix("bit"))
+    bufferpixels = COLOR_DEPTHS[color_depth]
+
+    display_pixel_mode = DISPLAY_PIXEL_MODES[config[CONF_PIXEL_MODE]][1]
+    bus_type = config[CONF_BUS_MODE]
+    if bus_type == TYPE_SINGLE and config.get(CONF_SPI_16, False):
+        # If the bus mode is single and spi_16 is set, use single 16-bit mode
+        bus_type = BusType.BUS_TYPE_SINGLE_16
+    else:
+        bus_type = BusTypes[bus_type]
+    buffer_type = cg.uint8 if color_depth == 8 else cg.uint16
+    frac = denominator(config)
+    rotation = DISPLAY_ROTATIONS[
+        0 if is_rotation_transformable(config) else config.get(CONF_ROTATION, 0)
+    ]
+    templateargs = [
+        buffer_type,
+        bufferpixels,
+        config[CONF_BYTE_ORDER] == "big_endian",
+        display_pixel_mode,
+        bus_type,
+        width,
+        height,
+        offset_width,
+        offset_height,
+    ]
+    # If a buffer is required, use MipiSpiBuffer, otherwise use MipiSpi
+    if requires_buffer(config):
+        templateargs.append(rotation)
+        templateargs.append(frac)
+        return MipiSpiBuffer, templateargs
+    return MipiSpi, templateargs
+
+
 async def to_code(config):
     model = MODELS[config[CONF_MODEL]]
-    transform = get_transform(model, config)
-    if CONF_DIMENSIONS in config:
-        # Explicit dimensions, just use as is
-        dimensions = config[CONF_DIMENSIONS]
-        if isinstance(dimensions, dict):
-            width = dimensions[CONF_WIDTH]
-            height = dimensions[CONF_HEIGHT]
-            offset_width = dimensions[CONF_OFFSET_WIDTH]
-            offset_height = dimensions[CONF_OFFSET_HEIGHT]
-        else:
-            (width, height) = dimensions
-            offset_width = 0
-            offset_height = 0
-    else:
-        # Default dimensions, use model defaults and transform if needed
-        width = model.get_default(CONF_WIDTH)
-        height = model.get_default(CONF_HEIGHT)
-        offset_width = model.get_default(CONF_OFFSET_WIDTH, 0)
-        offset_height = model.get_default(CONF_OFFSET_HEIGHT, 0)
-
-        # if mirroring axes and there are offsets, also mirror the offsets to cater for situations where
-        # the offset is asymmetric
-        if transform[CONF_MIRROR_X]:
-            native_width = model.get_default(
-                CONF_NATIVE_WIDTH, width + offset_width * 2
-            )
-            offset_width = native_width - width - offset_width
-        if transform[CONF_MIRROR_Y]:
-            native_height = model.get_default(
-                CONF_NATIVE_HEIGHT, height + offset_height * 2
-            )
-            offset_height = native_height - height - offset_height
-        # Swap default dimensions if swap_xy is set
-        if transform[CONF_SWAP_XY] is True:
-            width, height = height, width
-            offset_height, offset_width = offset_width, offset_height
-
-    color_depth = config[CONF_COLOR_DEPTH]
-    if color_depth.endswith("bit"):
-        color_depth = color_depth[:-3]
-    color_depth = COLOR_DEPTHS[int(color_depth)]
-
-    var = cg.new_Pvariable(
-        config[CONF_ID], width, height, offset_width, offset_height, color_depth
-    )
+    var_id = config[CONF_ID]
+    var_id.type, templateargs = get_instance(config)
+    var = cg.new_Pvariable(var_id, TemplateArguments(*templateargs))
     cg.add(var.set_init_sequence(get_sequence(model, config)))
-    if rotation_as_transform(model, config):
+    if is_rotation_transformable(config):
         if CONF_TRANSFORM in config:
             LOGGER.warning("Use of 'transform' with 'rotation' is not recommended")
         else:
             config[CONF_ROTATION] = 0
     cg.add(var.set_model(config[CONF_MODEL]))
-    cg.add(var.set_draw_from_origin(config[CONF_DRAW_FROM_ORIGIN]))
     cg.add(var.set_draw_rounding(config[CONF_DRAW_ROUNDING]))
-    cg.add(var.set_spi_16(config[CONF_SPI_16]))
     if enable_pin := config.get(CONF_ENABLE_PIN):
         enable = [await cg.gpio_pin_expression(pin) for pin in enable_pin]
         cg.add(var.set_enable_pins(enable))
@@ -472,4 +621,5 @@ async def to_code(config):
         cg.add(var.set_writer(lambda_))
     await display.register_display(var, config)
     await spi.register_spi_device(var, config)
+    # Displays are write-only, set the SPI device to write-only as well
     cg.add(var.set_write_only(True))

esphome/components/mipi_spi/mipi_spi.cpp

@@ -2,489 +2,5 @@
 #include "esphome/core/log.h"
 
 namespace esphome {
-namespace mipi_spi {
-
-void MipiSpi::setup() {
-  ESP_LOGCONFIG(TAG, "Running setup");
-  this->spi_setup();
-  if (this->dc_pin_ != nullptr) {
-    this->dc_pin_->setup();
-    this->dc_pin_->digital_write(false);
-  }
-  for (auto *pin : this->enable_pins_) {
-    pin->setup();
-    pin->digital_write(true);
-  }
-  if (this->reset_pin_ != nullptr) {
-    this->reset_pin_->setup();
-    this->reset_pin_->digital_write(true);
-    delay(5);
-    this->reset_pin_->digital_write(false);
-    delay(5);
-    this->reset_pin_->digital_write(true);
-  }
-  this->bus_width_ = this->parent_->get_bus_width();
-
-  // need to know when the display is ready for SLPOUT command - will be 120ms after reset
-  auto when = millis() + 120;
-  delay(10);
-  size_t index = 0;
-  auto &vec = this->init_sequence_;
-  while (index != vec.size()) {
-    if (vec.size() - index < 2) {
-      ESP_LOGE(TAG, "Malformed init sequence");
-      this->mark_failed();
-      return;
-    }
-    uint8_t cmd = vec[index++];
-    uint8_t x = vec[index++];
-    if (x == DELAY_FLAG) {
-      ESP_LOGD(TAG, "Delay %dms", cmd);
-      delay(cmd);
-    } else {
-      uint8_t num_args = x & 0x7F;
-      if (vec.size() - index < num_args) {
-        ESP_LOGE(TAG, "Malformed init sequence");
-        this->mark_failed();
-        return;
-      }
-      auto arg_byte = vec[index];
-      switch (cmd) {
-        case SLEEP_OUT: {
-          // are we ready, boots?
-          int duration = when - millis();
-          if (duration > 0) {
-            ESP_LOGD(TAG, "Sleep %dms", duration);
-            delay(duration);
-          }
-        } break;
-
-        case INVERT_ON:
-          this->invert_colors_ = true;
-          break;
-        case MADCTL_CMD:
-          this->madctl_ = arg_byte;
-          break;
-        case PIXFMT:
-          this->pixel_mode_ = arg_byte & 0x11 ? PIXEL_MODE_16 : PIXEL_MODE_18;
-          break;
-        case BRIGHTNESS:
-          this->brightness_ = arg_byte;
-          break;
-
-        default:
-          break;
-      }
-      const auto *ptr = vec.data() + index;
-      ESP_LOGD(TAG, "Command %02X, length %d, byte %02X", cmd, num_args, arg_byte);
-      this->write_command_(cmd, ptr, num_args);
-      index += num_args;
-      if (cmd == SLEEP_OUT)
-        delay(10);
-    }
-  }
-  this->setup_complete_ = true;
-  if (this->draw_from_origin_)
-    check_buffer_();
-  ESP_LOGCONFIG(TAG, "MIPI SPI setup complete");
-}
-
-void MipiSpi::update() {
-  if (!this->setup_complete_ || this->is_failed()) {
-    return;
-  }
-  this->do_update_();
-  if (this->buffer_ == nullptr || this->x_low_ > this->x_high_ || this->y_low_ > this->y_high_)
-    return;
-  ESP_LOGV(TAG, "x_low %d, y_low %d, x_high %d, y_high %d", this->x_low_, this->y_low_, this->x_high_, this->y_high_);
-  // Some chips require that the drawing window be aligned on certain boundaries
-  auto dr = this->draw_rounding_;
-  this->x_low_ = this->x_low_ / dr * dr;
-  this->y_low_ = this->y_low_ / dr * dr;
-  this->x_high_ = (this->x_high_ + dr) / dr * dr - 1;
-  this->y_high_ = (this->y_high_ + dr) / dr * dr - 1;
-  if (this->draw_from_origin_) {
-    this->x_low_ = 0;
-    this->y_low_ = 0;
-    this->x_high_ = this->width_ - 1;
-  }
-  int w = this->x_high_ - this->x_low_ + 1;
-  int h = this->y_high_ - this->y_low_ + 1;
-  this->write_to_display_(this->x_low_, this->y_low_, w, h, this->buffer_, this->x_low_, this->y_low_,
-                          this->width_ - w - this->x_low_);
-  // invalidate watermarks
-  this->x_low_ = this->width_;
-  this->y_low_ = this->height_;
-  this->x_high_ = 0;
-  this->y_high_ = 0;
-}
-
-void MipiSpi::fill(Color color) {
-  if (!this->check_buffer_())
-    return;
-  this->x_low_ = 0;
-  this->y_low_ = 0;
-  this->x_high_ = this->get_width_internal() - 1;
-  this->y_high_ = this->get_height_internal() - 1;
-  switch (this->color_depth_) {
-    case display::COLOR_BITNESS_332: {
-      auto new_color = display::ColorUtil::color_to_332(color, display::ColorOrder::COLOR_ORDER_RGB);
-      memset(this->buffer_, (uint8_t) new_color, this->buffer_bytes_);
-      break;
-    }
-    default: {
-      auto new_color = display::ColorUtil::color_to_565(color);
-      if (((uint8_t) (new_color >> 8)) == ((uint8_t) new_color)) {
-        // Upper and lower is equal can use quicker memset operation. Takes ~20ms.
-        memset(this->buffer_, (uint8_t) new_color, this->buffer_bytes_);
-      } else {
-        auto *ptr_16 = reinterpret_cast<uint16_t *>(this->buffer_);
-        auto len = this->buffer_bytes_ / 2;
-        while (len--) {
-          *ptr_16++ = new_color;
-        }
-      }
-    }
-  }
-}
-
-void MipiSpi::draw_absolute_pixel_internal(int x, int y, Color color) {
-  if (x >= this->get_width_internal() || x < 0 || y >= this->get_height_internal() || y < 0) {
-    return;
-  }
-  if (!this->check_buffer_())
-    return;
-  size_t pos = (y * this->width_) + x;
-  switch (this->color_depth_) {
-    case display::COLOR_BITNESS_332: {
-      uint8_t new_color = display::ColorUtil::color_to_332(color);
-      if (this->buffer_[pos] == new_color)
-        return;
-      this->buffer_[pos] = new_color;
-      break;
-    }
-
-    case display::COLOR_BITNESS_565: {
-      auto *ptr_16 = reinterpret_cast<uint16_t *>(this->buffer_);
-      uint8_t hi_byte = static_cast<uint8_t>(color.r & 0xF8) | (color.g >> 5);
-      uint8_t lo_byte = static_cast<uint8_t>((color.g & 0x1C) << 3) | (color.b >> 3);
-      uint16_t new_color = hi_byte | (lo_byte << 8);  // big endian
-      if (ptr_16[pos] == new_color)
-        return;
-      ptr_16[pos] = new_color;
-      break;
-    }
-    default:
-      return;
-  }
-  // low and high watermark may speed up drawing from buffer
-  if (x < this->x_low_)
-    this->x_low_ = x;
-  if (y < this->y_low_)
-    this->y_low_ = y;
-  if (x > this->x_high_)
-    this->x_high_ = x;
-  if (y > this->y_high_)
-    this->y_high_ = y;
-}
-
-void MipiSpi::reset_params_() {
-  if (!this->is_ready())
-    return;
-  this->write_command_(this->invert_colors_ ? INVERT_ON : INVERT_OFF);
-  if (this->brightness_.has_value())
-    this->write_command_(BRIGHTNESS, this->brightness_.value());
-}
-
-void MipiSpi::write_init_sequence_() {
-  size_t index = 0;
-  auto &vec = this->init_sequence_;
-  while (index != vec.size()) {
-    if (vec.size() - index < 2) {
-      ESP_LOGE(TAG, "Malformed init sequence");
-      this->mark_failed();
-      return;
-    }
-    uint8_t cmd = vec[index++];
-    uint8_t x = vec[index++];
-    if (x == DELAY_FLAG) {
-      ESP_LOGV(TAG, "Delay %dms", cmd);
-      delay(cmd);
-    } else {
-      uint8_t num_args = x & 0x7F;
-      if (vec.size() - index < num_args) {
-        ESP_LOGE(TAG, "Malformed init sequence");
-        this->mark_failed();
-        return;
-      }
-      const auto *ptr = vec.data() + index;
-      this->write_command_(cmd, ptr, num_args);
-      index += num_args;
-    }
-  }
-  this->setup_complete_ = true;
-  ESP_LOGCONFIG(TAG, "MIPI SPI setup complete");
-}
-
-void MipiSpi::set_addr_window_(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2) {
-  ESP_LOGVV(TAG, "Set addr %d/%d, %d/%d", x1, y1, x2, y2);
-  uint8_t buf[4];
-  x1 += this->offset_width_;
-  x2 += this->offset_width_;
-  y1 += this->offset_height_;
-  y2 += this->offset_height_;
-  put16_be(buf, y1);
-  put16_be(buf + 2, y2);
-  this->write_command_(RASET, buf, sizeof buf);
-  put16_be(buf, x1);
-  put16_be(buf + 2, x2);
-  this->write_command_(CASET, buf, sizeof buf);
-}
-
-void MipiSpi::draw_pixels_at(int x_start, int y_start, int w, int h, const uint8_t *ptr, display::ColorOrder order,
-                             display::ColorBitness bitness, bool big_endian, int x_offset, int y_offset, int x_pad) {
-  if (!this->setup_complete_ || this->is_failed())
-    return;
-  if (w <= 0 || h <= 0)
-    return;
-  if (bitness != this->color_depth_ || big_endian != (this->bit_order_ == spi::BIT_ORDER_MSB_FIRST)) {
-    Display::draw_pixels_at(x_start, y_start, w, h, ptr, order, bitness, big_endian, x_offset, y_offset, x_pad);
-    return;
-  }
-  if (this->draw_from_origin_) {
-    auto stride = x_offset + w + x_pad;
-    for (int y = 0; y != h; y++) {
-      memcpy(this->buffer_ + ((y + y_start) * this->width_ + x_start) * 2,
-             ptr + ((y + y_offset) * stride + x_offset) * 2, w * 2);
-    }
-    ptr = this->buffer_;
-    w = this->width_;
-    h += y_start;
-    x_start = 0;
-    y_start = 0;
-    x_offset = 0;
-    y_offset = 0;
-  }
-  this->write_to_display_(x_start, y_start, w, h, ptr, x_offset, y_offset, x_pad);
-}
-
-void MipiSpi::write_18_from_16_bit_(const uint16_t *ptr, size_t w, size_t h, size_t stride) {
-  stride -= w;
-  uint8_t transfer_buffer[6 * 256];
-  size_t idx = 0;  // index into transfer_buffer
-  while (h-- != 0) {
-    for (auto x = w; x-- != 0;) {
-      auto color_val = *ptr++;
-      // deal with byte swapping
-      transfer_buffer[idx++] = (color_val & 0xF8);                                       // Blue
-      transfer_buffer[idx++] = ((color_val & 0x7) << 5) | ((color_val & 0xE000) >> 11);  // Green
-      transfer_buffer[idx++] = (color_val >> 5) & 0xF8;                                  // Red
-      if (idx == sizeof(transfer_buffer)) {
-        this->write_array(transfer_buffer, idx);
-        idx = 0;
-      }
-    }
-    ptr += stride;
-  }
-  if (idx != 0)
-    this->write_array(transfer_buffer, idx);
-}
-
-void MipiSpi::write_18_from_8_bit_(const uint8_t *ptr, size_t w, size_t h, size_t stride) {
-  stride -= w;
-  uint8_t transfer_buffer[6 * 256];
-  size_t idx = 0;  // index into transfer_buffer
-  while (h-- != 0) {
-    for (auto x = w; x-- != 0;) {
-      auto color_val = *ptr++;
-      transfer_buffer[idx++] = color_val & 0xE0;         // Red
-      transfer_buffer[idx++] = (color_val << 3) & 0xE0;  // Green
-      transfer_buffer[idx++] = color_val << 6;           // Blue
-      if (idx == sizeof(transfer_buffer)) {
-        this->write_array(transfer_buffer, idx);
-        idx = 0;
-      }
-    }
-    ptr += stride;
-  }
-  if (idx != 0)
-    this->write_array(transfer_buffer, idx);
-}
-
-void MipiSpi::write_16_from_8_bit_(const uint8_t *ptr, size_t w, size_t h, size_t stride) {
-  stride -= w;
-  uint8_t transfer_buffer[6 * 256];
-  size_t idx = 0;  // index into transfer_buffer
-  while (h-- != 0) {
-    for (auto x = w; x-- != 0;) {
-      auto color_val = *ptr++;
-      transfer_buffer[idx++] = (color_val & 0xE0) | ((color_val & 0x1C) >> 2);
-      transfer_buffer[idx++] = (color_val & 0x3) << 3;
-      if (idx == sizeof(transfer_buffer)) {
-        this->write_array(transfer_buffer, idx);
-        idx = 0;
-      }
-    }
-    ptr += stride;
-  }
-  if (idx != 0)
-    this->write_array(transfer_buffer, idx);
-}
-
-void MipiSpi::write_to_display_(int x_start, int y_start, int w, int h, const uint8_t *ptr, int x_offset, int y_offset,
-                                int x_pad) {
-  this->set_addr_window_(x_start, y_start, x_start + w - 1, y_start + h - 1);
-  auto stride = x_offset + w + x_pad;
-  const auto *offset_ptr = ptr;
-  if (this->color_depth_ == display::COLOR_BITNESS_332) {
-    offset_ptr += y_offset * stride + x_offset;
-  } else {
-    stride *= 2;
-    offset_ptr += y_offset * stride + x_offset * 2;
-  }
-
-  switch (this->bus_width_) {
-    case 4:
-      this->enable();
-      if (x_offset == 0 && x_pad == 0 && y_offset == 0) {
-        // we could deal here with a non-zero y_offset, but if x_offset is zero, y_offset probably will be so don't
-        // bother
-        this->write_cmd_addr_data(8, 0x32, 24, WDATA << 8, ptr, w * h * 2, 4);
-      } else {
-        this->write_cmd_addr_data(8, 0x32, 24, WDATA << 8, nullptr, 0, 4);
-        for (int y = 0; y != h; y++) {
-          this->write_cmd_addr_data(0, 0, 0, 0, offset_ptr, w * 2, 4);
-          offset_ptr += stride;
-        }
-      }
-      break;
-
-    case 8:
-      this->write_command_(WDATA);
-      this->enable();
-      if (x_offset == 0 && x_pad == 0 && y_offset == 0) {
-        this->write_cmd_addr_data(0, 0, 0, 0, ptr, w * h * 2, 8);
-      } else {
-        for (int y = 0; y != h; y++) {
-          this->write_cmd_addr_data(0, 0, 0, 0, offset_ptr, w * 2, 8);
-          offset_ptr += stride;
-        }
-      }
-      break;
-
-    default:
-      this->write_command_(WDATA);
-      this->enable();
-
-      if (this->color_depth_ == display::COLOR_BITNESS_565) {
-        // Source buffer is 16-bit RGB565
-        if (this->pixel_mode_ == PIXEL_MODE_18) {
-          // Convert RGB565 to RGB666
-          this->write_18_from_16_bit_(reinterpret_cast<const uint16_t *>(offset_ptr), w, h, stride / 2);
-        } else {
-          // Direct RGB565 output
-          if (x_offset == 0 && x_pad == 0 && y_offset == 0) {
-            this->write_array(ptr, w * h * 2);
-          } else {
-            for (int y = 0; y != h; y++) {
-              this->write_array(offset_ptr, w * 2);
-              offset_ptr += stride;
-            }
-          }
-        }
-      } else {
-        // Source buffer is 8-bit RGB332
-        if (this->pixel_mode_ == PIXEL_MODE_18) {
-          // Convert RGB332 to RGB666
-          this->write_18_from_8_bit_(offset_ptr, w, h, stride);
-        } else {
-          this->write_16_from_8_bit_(offset_ptr, w, h, stride);
-        }
-        break;
-      }
-  }
-  this->disable();
-}
-
-void MipiSpi::write_command_(uint8_t cmd, const uint8_t *bytes, size_t len) {
-  ESP_LOGV(TAG, "Command %02X, length %d, bytes %s", cmd, len, format_hex_pretty(bytes, len).c_str());
-  if (this->bus_width_ == 4) {
-    this->enable();
-    this->write_cmd_addr_data(8, 0x02, 24, cmd << 8, bytes, len);
-    this->disable();
-  } else if (this->bus_width_ == 8) {
-    this->dc_pin_->digital_write(false);
-    this->enable();
-    this->write_cmd_addr_data(0, 0, 0, 0, &cmd, 1, 8);
-    this->disable();
-    this->dc_pin_->digital_write(true);
-    if (len != 0) {
-      this->enable();
-      this->write_cmd_addr_data(0, 0, 0, 0, bytes, len, 8);
-      this->disable();
-    }
-  } else {
-    this->dc_pin_->digital_write(false);
-    this->enable();
-    this->write_byte(cmd);
-    this->disable();
-    this->dc_pin_->digital_write(true);
-    if (len != 0) {
-      if (this->spi_16_) {
-        for (size_t i = 0; i != len; i++) {
-          this->enable();
-          this->write_byte(0);
-          this->write_byte(bytes[i]);
-          this->disable();
-        }
-      } else {
-        this->enable();
-        this->write_array(bytes, len);
-        this->disable();
-      }
-    }
-  }
-}
-
-void MipiSpi::dump_config() {
-  ESP_LOGCONFIG(TAG,
-                "MIPI_SPI Display\n"
-                "  Model: %s\n"
-                "  Width: %u\n"
-                "  Height: %u",
-                this->model_, this->width_, this->height_);
-  if (this->offset_width_ != 0)
-    ESP_LOGCONFIG(TAG, "  Offset width: %u", this->offset_width_);
-  if (this->offset_height_ != 0)
-    ESP_LOGCONFIG(TAG, "  Offset height: %u", this->offset_height_);
-  ESP_LOGCONFIG(TAG,
-                "  Swap X/Y: %s\n"
-                "  Mirror X: %s\n"
-                "  Mirror Y: %s\n"
-                "  Color depth: %d bits\n"
-                "  Invert colors: %s\n"
-                "  Color order: %s\n"
-                "  Pixel mode: %s",
-                YESNO(this->madctl_ & MADCTL_MV), YESNO(this->madctl_ & (MADCTL_MX | MADCTL_XFLIP)),
-                YESNO(this->madctl_ & (MADCTL_MY | MADCTL_YFLIP)),
-                this->color_depth_ == display::COLOR_BITNESS_565 ? 16 : 8, YESNO(this->invert_colors_),
-                this->madctl_ & MADCTL_BGR ? "BGR" : "RGB", this->pixel_mode_ == PIXEL_MODE_18 ? "18bit" : "16bit");
-  if (this->brightness_.has_value())
-    ESP_LOGCONFIG(TAG, "  Brightness: %u", this->brightness_.value());
-  if (this->spi_16_)
-    ESP_LOGCONFIG(TAG, "  SPI 16bit: YES");
-  ESP_LOGCONFIG(TAG, "  Draw rounding: %u", this->draw_rounding_);
-  if (this->draw_from_origin_)
-    ESP_LOGCONFIG(TAG, "  Draw from origin: YES");
-  LOG_PIN("  CS Pin: ", this->cs_);
-  LOG_PIN("  Reset Pin: ", this->reset_pin_);
-  LOG_PIN("  DC Pin: ", this->dc_pin_);
-  ESP_LOGCONFIG(TAG,
-                "  SPI Mode: %d\n"
-                "  SPI Data rate: %dMHz\n"
-                "  SPI Bus width: %d",
-                this->mode_, static_cast<unsigned>(this->data_rate_ / 1000000), this->bus_width_);
-}
-
-}  // namespace mipi_spi
+namespace mipi_spi {}  // namespace mipi_spi
 }  // namespace esphome

esphome/components/mipi_spi/mipi_spi.h

@@ -4,40 +4,39 @@
 
 #include "esphome/components/spi/spi.h"
 #include "esphome/components/display/display.h"
-#include "esphome/components/display/display_buffer.h"
 #include "esphome/components/display/display_color_utils.h"
 
 namespace esphome {
 namespace mipi_spi {
 
 constexpr static const char *const TAG = "display.mipi_spi";
-static const uint8_t SW_RESET_CMD = 0x01;
-static const uint8_t SLEEP_OUT = 0x11;
-static const uint8_t NORON = 0x13;
-static const uint8_t INVERT_OFF = 0x20;
-static const uint8_t INVERT_ON = 0x21;
-static const uint8_t ALL_ON = 0x23;
-static const uint8_t WRAM = 0x24;
-static const uint8_t MIPI = 0x26;
-static const uint8_t DISPLAY_ON = 0x29;
-static const uint8_t RASET = 0x2B;
-static const uint8_t CASET = 0x2A;
-static const uint8_t WDATA = 0x2C;
-static const uint8_t TEON = 0x35;
-static const uint8_t MADCTL_CMD = 0x36;
-static const uint8_t PIXFMT = 0x3A;
-static const uint8_t BRIGHTNESS = 0x51;
-static const uint8_t SWIRE1 = 0x5A;
-static const uint8_t SWIRE2 = 0x5B;
-static const uint8_t PAGESEL = 0xFE;
+static constexpr uint8_t SW_RESET_CMD = 0x01;
+static constexpr uint8_t SLEEP_OUT = 0x11;
+static constexpr uint8_t NORON = 0x13;
+static constexpr uint8_t INVERT_OFF = 0x20;
+static constexpr uint8_t INVERT_ON = 0x21;
+static constexpr uint8_t ALL_ON = 0x23;
+static constexpr uint8_t WRAM = 0x24;
+static constexpr uint8_t MIPI = 0x26;
+static constexpr uint8_t DISPLAY_ON = 0x29;
+static constexpr uint8_t RASET = 0x2B;
+static constexpr uint8_t CASET = 0x2A;
+static constexpr uint8_t WDATA = 0x2C;
+static constexpr uint8_t TEON = 0x35;
+static constexpr uint8_t MADCTL_CMD = 0x36;
+static constexpr uint8_t PIXFMT = 0x3A;
+static constexpr uint8_t BRIGHTNESS = 0x51;
+static constexpr uint8_t SWIRE1 = 0x5A;
+static constexpr uint8_t SWIRE2 = 0x5B;
+static constexpr uint8_t PAGESEL = 0xFE;
 
-static const uint8_t MADCTL_MY = 0x80;     // Bit 7 Bottom to top
-static const uint8_t MADCTL_MX = 0x40;     // Bit 6 Right to left
-static const uint8_t MADCTL_MV = 0x20;     // Bit 5 Swap axes
-static const uint8_t MADCTL_RGB = 0x00;    // Bit 3 Red-Green-Blue pixel order
-static const uint8_t MADCTL_BGR = 0x08;    // Bit 3 Blue-Green-Red pixel order
-static const uint8_t MADCTL_XFLIP = 0x02;  // Mirror the display horizontally
-static const uint8_t MADCTL_YFLIP = 0x01;  // Mirror the display vertically
+static constexpr uint8_t MADCTL_MY = 0x80;     // Bit 7 Bottom to top
+static constexpr uint8_t MADCTL_MX = 0x40;     // Bit 6 Right to left
+static constexpr uint8_t MADCTL_MV = 0x20;     // Bit 5 Swap axes
+static constexpr uint8_t MADCTL_RGB = 0x00;    // Bit 3 Red-Green-Blue pixel order
+static constexpr uint8_t MADCTL_BGR = 0x08;    // Bit 3 Blue-Green-Red pixel order
+static constexpr uint8_t MADCTL_XFLIP = 0x02;  // Mirror the display horizontally
+static constexpr uint8_t MADCTL_YFLIP = 0x01;  // Mirror the display vertically
 
 static const uint8_t DELAY_FLAG = 0xFF;
 // store a 16 bit value in a buffer, big endian.
@@ -46,28 +45,44 @@ static inline void put16_be(uint8_t *buf, uint16_t value) {
   buf[1] = value;
 }
 
+// Buffer mode, conveniently also the number of bytes in a pixel
 enum PixelMode {
-  PIXEL_MODE_16,
-  PIXEL_MODE_18,
+  PIXEL_MODE_8 = 1,
+  PIXEL_MODE_16 = 2,
+  PIXEL_MODE_18 = 3,
 };
 
-class MipiSpi : public display::DisplayBuffer,
+enum BusType {
+  BUS_TYPE_SINGLE = 1,
+  BUS_TYPE_QUAD = 4,
+  BUS_TYPE_OCTAL = 8,
+  BUS_TYPE_SINGLE_16 = 16,  // Single bit bus, but 16 bits per transfer
+};
+
+/**
+ * Base class for MIPI SPI displays.
+ * All the methods are defined here in the header file, as it is not possible to define templated methods in a cpp file.
+ *
+ * @tparam BUFFERTYPE The type of the buffer pixels, e.g. uint8_t or uint16_t
+ * @tparam BUFFERPIXEL Color depth of the buffer
+ * @tparam DISPLAYPIXEL Color depth of the display
+ * @tparam BUS_TYPE The type of the interface bus (single, quad, octal)
+ * @tparam WIDTH Width of the display in pixels
+ * @tparam HEIGHT Height of the display in pixels
+ * @tparam OFFSET_WIDTH The x-offset of the display in pixels
+ * @tparam OFFSET_HEIGHT The y-offset of the display in pixels
+ * buffer
+ */
+template<typename BUFFERTYPE, PixelMode BUFFERPIXEL, bool IS_BIG_ENDIAN, PixelMode DISPLAYPIXEL, BusType BUS_TYPE,
+         int WIDTH, int HEIGHT, int OFFSET_WIDTH, int OFFSET_HEIGHT>
+class MipiSpi : public display::Display,
                 public spi::SPIDevice<spi::BIT_ORDER_MSB_FIRST, spi::CLOCK_POLARITY_LOW, spi::CLOCK_PHASE_LEADING,
                                       spi::DATA_RATE_1MHZ> {
  public:
-  MipiSpi(size_t width, size_t height, int16_t offset_width, int16_t offset_height, display::ColorBitness color_depth)
-      : width_(width),
-        height_(height),
-        offset_width_(offset_width),
-        offset_height_(offset_height),
-        color_depth_(color_depth) {}
+  MipiSpi() {}
+  void update() override { this->stop_poller(); }
+  void draw_pixel_at(int x, int y, Color color) override {}
   void set_model(const char *model) { this->model_ = model; }
-  void update() override;
-  void setup() override;
-  display::ColorOrder get_color_mode() {
-    return this->madctl_ & MADCTL_BGR ? display::COLOR_ORDER_BGR : display::COLOR_ORDER_RGB;
-  }
-
   void set_reset_pin(GPIOPin *reset_pin) { this->reset_pin_ = reset_pin; }
   void set_enable_pins(std::vector<GPIOPin *> enable_pins) { this->enable_pins_ = std::move(enable_pins); }
   void set_dc_pin(GPIOPin *dc_pin) { this->dc_pin_ = dc_pin; }
@@ -79,93 +94,524 @@ class MipiSpi : public display::DisplayBuffer,
     this->brightness_ = brightness;
     this->reset_params_();
   }
-
-  void set_draw_from_origin(bool draw_from_origin) { this->draw_from_origin_ = draw_from_origin; }
   display::DisplayType get_display_type() override { return display::DisplayType::DISPLAY_TYPE_COLOR; }
-  void dump_config() override;
 
-  int get_width_internal() override { return this->width_; }
-  int get_height_internal() override { return this->height_; }
-  bool can_proceed() override { return this->setup_complete_; }
+  int get_width_internal() override { return WIDTH; }
+  int get_height_internal() override { return HEIGHT; }
   void set_init_sequence(const std::vector<uint8_t> &sequence) { this->init_sequence_ = sequence; }
   void set_draw_rounding(unsigned rounding) { this->draw_rounding_ = rounding; }
-  void set_spi_16(bool spi_16) { this->spi_16_ = spi_16; }
+
+  // reset the display, and write the init sequence
+  void setup() override {
+    this->spi_setup();
+    if (this->dc_pin_ != nullptr) {
+      this->dc_pin_->setup();
+      this->dc_pin_->digital_write(false);
+    }
+    for (auto *pin : this->enable_pins_) {
+      pin->setup();
+      pin->digital_write(true);
+    }
+    if (this->reset_pin_ != nullptr) {
+      this->reset_pin_->setup();
+      this->reset_pin_->digital_write(true);
+      delay(5);
+      this->reset_pin_->digital_write(false);
+      delay(5);
+      this->reset_pin_->digital_write(true);
+    }
+
+    // need to know when the display is ready for SLPOUT command - will be 120ms after reset
+    auto when = millis() + 120;
+    delay(10);
+    size_t index = 0;
+    auto &vec = this->init_sequence_;
+    while (index != vec.size()) {
+      if (vec.size() - index < 2) {
+        esph_log_e(TAG, "Malformed init sequence");
+        this->mark_failed();
+        return;
+      }
+      uint8_t cmd = vec[index++];
+      uint8_t x = vec[index++];
+      if (x == DELAY_FLAG) {
+        esph_log_d(TAG, "Delay %dms", cmd);
+        delay(cmd);
+      } else {
+        uint8_t num_args = x & 0x7F;
+        if (vec.size() - index < num_args) {
+          esph_log_e(TAG, "Malformed init sequence");
+          this->mark_failed();
+          return;
+        }
+        auto arg_byte = vec[index];
+        switch (cmd) {
+          case SLEEP_OUT: {
+            // are we ready, boots?
+            int duration = when - millis();
+            if (duration > 0) {
+              esph_log_d(TAG, "Sleep %dms", duration);
+              delay(duration);
+            }
+          } break;
+
+          case INVERT_ON:
+            this->invert_colors_ = true;
+            break;
+          case MADCTL_CMD:
+            this->madctl_ = arg_byte;
+            break;
+          case BRIGHTNESS:
+            this->brightness_ = arg_byte;
+            break;
+
+          default:
+            break;
+        }
+        const auto *ptr = vec.data() + index;
+        esph_log_d(TAG, "Command %02X, length %d, byte %02X", cmd, num_args, arg_byte);
+        this->write_command_(cmd, ptr, num_args);
+        index += num_args;
+        if (cmd == SLEEP_OUT)
+          delay(10);
+      }
+    }
+    // init sequence no longer needed
+    this->init_sequence_.clear();
+  }
+
+  // Drawing operations
+
+  void draw_pixels_at(int x_start, int y_start, int w, int h, const uint8_t *ptr, display::ColorOrder order,
+                      display::ColorBitness bitness, bool big_endian, int x_offset, int y_offset, int x_pad) override {
+    if (this->is_failed())
+      return;
+    if (w <= 0 || h <= 0)
+      return;
+    if (get_pixel_mode(bitness) != BUFFERPIXEL || big_endian != IS_BIG_ENDIAN) {
+      // note that the usual logging macros are banned in header files, so use their replacement
+      esph_log_e(TAG, "Unsupported color depth or bit order");
+      return;
+    }
+    this->write_to_display_(x_start, y_start, w, h, reinterpret_cast<const BUFFERTYPE *>(ptr), x_offset, y_offset,
+                            x_pad);
+  }
+
+  void dump_config() override {
+    esph_log_config(TAG,
+                    "MIPI_SPI Display\n"
+                    "  Model: %s\n"
+                    "  Width: %u\n"
+                    "  Height: %u",
+                    this->model_, WIDTH, HEIGHT);
+    if constexpr (OFFSET_WIDTH != 0)
+      esph_log_config(TAG, "  Offset width: %u", OFFSET_WIDTH);
+    if constexpr (OFFSET_HEIGHT != 0)
+      esph_log_config(TAG, "  Offset height: %u", OFFSET_HEIGHT);
+    esph_log_config(TAG,
+                    "  Swap X/Y: %s\n"
+                    "  Mirror X: %s\n"
+                    "  Mirror Y: %s\n"
+                    "  Invert colors: %s\n"
+                    "  Color order: %s\n"
+                    "  Display pixels: %d bits\n"
+                    "  Endianness: %s\n",
+                    YESNO(this->madctl_ & MADCTL_MV), YESNO(this->madctl_ & (MADCTL_MX | MADCTL_XFLIP)),
+                    YESNO(this->madctl_ & (MADCTL_MY | MADCTL_YFLIP)), YESNO(this->invert_colors_),
+                    this->madctl_ & MADCTL_BGR ? "BGR" : "RGB", DISPLAYPIXEL * 8, IS_BIG_ENDIAN ? "Big" : "Little");
+    if (this->brightness_.has_value())
+      esph_log_config(TAG, "  Brightness: %u", this->brightness_.value());
+    if (this->cs_ != nullptr)
+      esph_log_config(TAG, "  CS Pin: %s", this->cs_->dump_summary().c_str());
+    if (this->reset_pin_ != nullptr)
+      esph_log_config(TAG, "  Reset Pin: %s", this->reset_pin_->dump_summary().c_str());
+    if (this->dc_pin_ != nullptr)
+      esph_log_config(TAG, "  DC Pin: %s", this->dc_pin_->dump_summary().c_str());
+    esph_log_config(TAG,
+                    "  SPI Mode: %d\n"
+                    "  SPI Data rate: %dMHz\n"
+                    "  SPI Bus width: %d",
+                    this->mode_, static_cast<unsigned>(this->data_rate_ / 1000000), BUS_TYPE);
+  }
 
  protected:
-  bool check_buffer_() {
-    if (this->is_failed())
-      return false;
-    if (this->buffer_ != nullptr)
-      return true;
-    auto bytes_per_pixel = this->color_depth_ == display::COLOR_BITNESS_565 ? 2 : 1;
-    this->init_internal_(this->width_ * this->height_ * bytes_per_pixel);
-    if (this->buffer_ == nullptr) {
-      this->mark_failed();
-      return false;
-    }
-    this->buffer_bytes_ = this->width_ * this->height_ * bytes_per_pixel;
-    return true;
-  }
-  void fill(Color color) override;
-  void draw_absolute_pixel_internal(int x, int y, Color color) override;
-  void draw_pixels_at(int x_start, int y_start, int w, int h, const uint8_t *ptr, display::ColorOrder order,
-                      display::ColorBitness bitness, bool big_endian, int x_offset, int y_offset, int x_pad) override;
-  void write_18_from_16_bit_(const uint16_t *ptr, size_t w, size_t h, size_t stride);
-  void write_18_from_8_bit_(const uint8_t *ptr, size_t w, size_t h, size_t stride);
-  void write_16_from_8_bit_(const uint8_t *ptr, size_t w, size_t h, size_t stride);
-  void write_to_display_(int x_start, int y_start, int w, int h, const uint8_t *ptr, int x_offset, int y_offset,
-                         int x_pad);
-  /**
-   * the RM67162 in quad SPI mode seems to work like this (not in the datasheet, this is deduced from the
-   * sample code.)
-   *
-   * Immediately after enabling /CS send 4 bytes in single-dataline SPI mode:
-   *    0: either 0x2 or 0x32. The first indicates that any subsequent data bytes after the initial 4 will be
-   *        sent in 1-dataline SPI. The second indicates quad mode.
-   *    1: 0x00
-   *    2: The command (register address) byte.
-   *    3: 0x00
-   *
-   *    This is followed by zero or more data bytes in either 1-wire or 4-wire mode, depending on the first byte.
-   *    At the conclusion of the write, de-assert /CS.
-   *
-   * @param cmd
-   * @param bytes
-   * @param len
-   */
-  void write_command_(uint8_t cmd, const uint8_t *bytes, size_t len);
-
+  /* METHODS */
+  // convenience functions to write commands with or without data
   void write_command_(uint8_t cmd, uint8_t data) { this->write_command_(cmd, &data, 1); }
   void write_command_(uint8_t cmd) { this->write_command_(cmd, &cmd, 0); }
-  void reset_params_();
-  void write_init_sequence_();
-  void set_addr_window_(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2);
 
+  // Writes a command to the display, with the given bytes.
+  void write_command_(uint8_t cmd, const uint8_t *bytes, size_t len) {
+    esph_log_v(TAG, "Command %02X, length %d, bytes %s", cmd, len, format_hex_pretty(bytes, len).c_str());
+    if constexpr (BUS_TYPE == BUS_TYPE_QUAD) {
+      this->enable();
+      this->write_cmd_addr_data(8, 0x02, 24, cmd << 8, bytes, len);
+      this->disable();
+    } else if constexpr (BUS_TYPE == BUS_TYPE_OCTAL) {
+      this->dc_pin_->digital_write(false);
+      this->enable();
+      this->write_cmd_addr_data(0, 0, 0, 0, &cmd, 1, 8);
+      this->disable();
+      this->dc_pin_->digital_write(true);
+      if (len != 0) {
+        this->enable();
+        this->write_cmd_addr_data(0, 0, 0, 0, bytes, len, 8);
+        this->disable();
+      }
+    } else if constexpr (BUS_TYPE == BUS_TYPE_SINGLE) {
+      this->dc_pin_->digital_write(false);
+      this->enable();
+      this->write_byte(cmd);
+      this->disable();
+      this->dc_pin_->digital_write(true);
+      if (len != 0) {
+        this->enable();
+        this->write_array(bytes, len);
+        this->disable();
+      }
+    } else if constexpr (BUS_TYPE == BUS_TYPE_SINGLE_16) {
+      this->dc_pin_->digital_write(false);
+      this->enable();
+      this->write_byte(cmd);
+      this->disable();
+      this->dc_pin_->digital_write(true);
+      for (size_t i = 0; i != len; i++) {
+        this->enable();
+        this->write_byte(0);
+        this->write_byte(bytes[i]);
+        this->disable();
+      }
+    }
+  }
+
+  // write changed parameters to the display
+  void reset_params_() {
+    if (!this->is_ready())
+      return;
+    this->write_command_(this->invert_colors_ ? INVERT_ON : INVERT_OFF);
+    if (this->brightness_.has_value())
+      this->write_command_(BRIGHTNESS, this->brightness_.value());
+  }
+
+  // set the address window for the next data write
+  void set_addr_window_(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2) {
+    esph_log_v(TAG, "Set addr %d/%d, %d/%d", x1, y1, x2, y2);
+    uint8_t buf[4];
+    x1 += OFFSET_WIDTH;
+    x2 += OFFSET_WIDTH;
+    y1 += OFFSET_HEIGHT;
+    y2 += OFFSET_HEIGHT;
+    put16_be(buf, y1);
+    put16_be(buf + 2, y2);
+    this->write_command_(RASET, buf, sizeof buf);
+    put16_be(buf, x1);
+    put16_be(buf + 2, x2);
+    this->write_command_(CASET, buf, sizeof buf);
+    if constexpr (BUS_TYPE != BUS_TYPE_QUAD) {
+      this->write_command_(WDATA);
+    }
+  }
+
+  // map the display color bitness to the pixel mode
+  static PixelMode get_pixel_mode(display::ColorBitness bitness) {
+    switch (bitness) {
+      case display::COLOR_BITNESS_888:
+        return PIXEL_MODE_18;  // 18 bits per pixel
+      case display::COLOR_BITNESS_565:
+        return PIXEL_MODE_16;  // 16 bits per pixel
+      default:
+        return PIXEL_MODE_8;  // Default to 8 bits per pixel
+    }
+  }
+
+  /**
+   * Writes a buffer to the display.
+   * @param w Width of each line in bytes
+   * @param h Height of the buffer in rows
+   * @param pad Padding in bytes after each line
+   */
+  void write_display_data_(const uint8_t *ptr, size_t w, size_t h, size_t pad) {
+    if (pad == 0) {
+      if constexpr (BUS_TYPE == BUS_TYPE_SINGLE || BUS_TYPE == BUS_TYPE_SINGLE_16) {
+        this->write_array(ptr, w * h);
+      } else if constexpr (BUS_TYPE == BUS_TYPE_QUAD) {
+        this->write_cmd_addr_data(8, 0x32, 24, WDATA << 8, ptr, w * h, 4);
+      } else if constexpr (BUS_TYPE == BUS_TYPE_OCTAL) {
+        this->write_cmd_addr_data(0, 0, 0, 0, ptr, w * h, 8);
+      }
+    } else {
+      for (size_t y = 0; y != h; y++) {
+        if constexpr (BUS_TYPE == BUS_TYPE_SINGLE || BUS_TYPE == BUS_TYPE_SINGLE_16) {
+          this->write_array(ptr, w);
+        } else if constexpr (BUS_TYPE == BUS_TYPE_QUAD) {
+          this->write_cmd_addr_data(8, 0x32, 24, WDATA << 8, ptr, w, 4);
+        } else if constexpr (BUS_TYPE == BUS_TYPE_OCTAL) {
+          this->write_cmd_addr_data(0, 0, 0, 0, ptr, w, 8);
+        }
+        ptr += w + pad;
+      }
+    }
+  }
+
+  /**
+   * Writes a buffer to the display.
+   *
+   * The ptr is a pointer to the pixel data
+   * The other parameters are all in pixel units.
+   */
+  void write_to_display_(int x_start, int y_start, int w, int h, const BUFFERTYPE *ptr, int x_offset, int y_offset,
+                         int x_pad) {
+    this->set_addr_window_(x_start, y_start, x_start + w - 1, y_start + h - 1);
+    this->enable();
+    ptr += y_offset * (x_offset + w + x_pad) + x_offset;
+    if constexpr (BUFFERPIXEL == DISPLAYPIXEL) {
+      this->write_display_data_(reinterpret_cast<const uint8_t *>(ptr), w * sizeof(BUFFERTYPE), h,
+                                x_pad * sizeof(BUFFERTYPE));
+    } else {
+      // type conversion required, do it in chunks
+      uint8_t dbuffer[DISPLAYPIXEL * 48];
+      uint8_t *dptr = dbuffer;
+      auto stride = x_offset + w + x_pad;  // stride in pixels
+      for (size_t y = 0; y != h; y++) {
+        for (size_t x = 0; x != w; x++) {
+          auto color_val = ptr[y * stride + x];
+          if constexpr (DISPLAYPIXEL == PIXEL_MODE_18 && BUFFERPIXEL == PIXEL_MODE_16) {
+            // 16 to 18 bit conversion
+            if constexpr (IS_BIG_ENDIAN) {
+              *dptr++ = color_val & 0xF8;
+              *dptr++ = ((color_val & 0x7) << 5) | (color_val & 0xE000) >> 11;
+              *dptr++ = (color_val >> 5) & 0xF8;
+            } else {
+              *dptr++ = (color_val >> 8) & 0xF8;  // Blue
+              *dptr++ = (color_val & 0x7E0) >> 3;
+              *dptr++ = color_val << 3;
+            }
+          } else if constexpr (DISPLAYPIXEL == PIXEL_MODE_18 && BUFFERPIXEL == PIXEL_MODE_8) {
+            // 8 bit to 18 bit conversion
+            *dptr++ = color_val << 6;           // Blue
+            *dptr++ = (color_val & 0x1C) << 3;  // Green
+            *dptr++ = (color_val & 0xE0);       // Red
+          } else if constexpr (DISPLAYPIXEL == PIXEL_MODE_16 && BUFFERPIXEL == PIXEL_MODE_8) {
+            if constexpr (IS_BIG_ENDIAN) {
+              *dptr++ = (color_val & 0xE0) | ((color_val & 0x1C) >> 2);
+              *dptr++ = (color_val & 3) << 3;
+            } else {
+              *dptr++ = (color_val & 3) << 3;
+              *dptr++ = (color_val & 0xE0) | ((color_val & 0x1C) >> 2);
+            }
+          }
+          // buffer full? Flush.
+          if (dptr == dbuffer + sizeof(dbuffer)) {
+            this->write_display_data_(dbuffer, sizeof(dbuffer), 1, 0);
+            dptr = dbuffer;
+          }
+        }
+      }
+      // flush any remaining data
+      if (dptr != dbuffer) {
+        this->write_display_data_(dbuffer, dptr - dbuffer, 1, 0);
+      }
+    }
+    this->disable();
+  }
+
+  /* PROPERTIES */
+
+  // GPIO pins
   GPIOPin *reset_pin_{nullptr};
   std::vector<GPIOPin *> enable_pins_{};
   GPIOPin *dc_pin_{nullptr};
-  uint16_t x_low_{1};
-  uint16_t y_low_{1};
-  uint16_t x_high_{0};
-  uint16_t y_high_{0};
-  bool setup_complete_{};
 
+  // other properties set by configuration
   bool invert_colors_{};
-  size_t width_;
-  size_t height_;
-  int16_t offset_width_;
-  int16_t offset_height_;
-  size_t buffer_bytes_{0};
-  display::ColorBitness color_depth_;
-  PixelMode pixel_mode_{PIXEL_MODE_16};
-  uint8_t bus_width_{};
-  bool spi_16_{};
-  uint8_t madctl_{};
-  bool draw_from_origin_{false};
   unsigned draw_rounding_{2};
   optional<uint8_t> brightness_{};
   const char *model_{"Unknown"};
   std::vector<uint8_t> init_sequence_{};
+  uint8_t madctl_{};
 };
+
+/**
+ * Class for MIPI SPI displays with a buffer.
+ *
+ * @tparam BUFFERTYPE The type of the buffer pixels, e.g. uint8_t or uint16_t
+ * @tparam BUFFERPIXEL Color depth of the buffer
+ * @tparam DISPLAYPIXEL Color depth of the display
+ * @tparam BUS_TYPE The type of the interface bus (single, quad, octal)
+ * @tparam ROTATION The rotation of the display
+ * @tparam WIDTH Width of the display in pixels
+ * @tparam HEIGHT Height of the display in pixels
+ * @tparam OFFSET_WIDTH The x-offset of the display in pixels
+ * @tparam OFFSET_HEIGHT The y-offset of the display in pixels
+ * @tparam FRACTION The fraction of the display size to use for the buffer (e.g. 4 means a 1/4 buffer).
+ */
+template<typename BUFFERTYPE, PixelMode BUFFERPIXEL, bool IS_BIG_ENDIAN, PixelMode DISPLAYPIXEL, BusType BUS_TYPE,
+         int WIDTH, int HEIGHT, int OFFSET_WIDTH, int OFFSET_HEIGHT, display::DisplayRotation ROTATION, int FRACTION>
+class MipiSpiBuffer : public MipiSpi<BUFFERTYPE, BUFFERPIXEL, IS_BIG_ENDIAN, DISPLAYPIXEL, BUS_TYPE, WIDTH, HEIGHT,
+                                     OFFSET_WIDTH, OFFSET_HEIGHT> {
+ public:
+  MipiSpiBuffer() { this->rotation_ = ROTATION; }
+
+  void dump_config() override {
+    MipiSpi<BUFFERTYPE, BUFFERPIXEL, IS_BIG_ENDIAN, DISPLAYPIXEL, BUS_TYPE, WIDTH, HEIGHT, OFFSET_WIDTH,
+            OFFSET_HEIGHT>::dump_config();
+    esph_log_config(TAG,
+                    "  Rotation: %d°\n"
+                    "  Buffer pixels: %d bits\n"
+                    "  Buffer fraction: 1/%d\n"
+                    "  Buffer bytes: %zu\n"
+                    "  Draw rounding: %u",
+                    this->rotation_, BUFFERPIXEL * 8, FRACTION, sizeof(BUFFERTYPE) * WIDTH * HEIGHT / FRACTION,
+                    this->draw_rounding_);
+  }
+
+  void setup() override {
+    MipiSpi<BUFFERTYPE, BUFFERPIXEL, IS_BIG_ENDIAN, DISPLAYPIXEL, BUS_TYPE, WIDTH, HEIGHT, OFFSET_WIDTH,
+            OFFSET_HEIGHT>::setup();
+    RAMAllocator<BUFFERTYPE> allocator{};
+    this->buffer_ = allocator.allocate(WIDTH * HEIGHT / FRACTION);
+    if (this->buffer_ == nullptr) {
+      this->mark_failed("Buffer allocation failed");
+    }
+  }
+
+  void update() override {
+#if ESPHOME_LOG_LEVEL == ESPHOME_LOG_LEVEL_VERBOSE
+    auto now = millis();
+#endif
+    if (this->is_failed()) {
+      return;
+    }
+    // for updates with a small buffer, we repeatedly call the writer_ function, clipping the height to a fraction of
+    // the display height,
+    for (this->start_line_ = 0; this->start_line_ < HEIGHT; this->start_line_ += HEIGHT / FRACTION) {
+#if ESPHOME_LOG_LEVEL == ESPHOME_LOG_LEVEL_VERBOSE
+      auto lap = millis();
+#endif
+      this->end_line_ = this->start_line_ + HEIGHT / FRACTION;
+      if (this->auto_clear_enabled_) {
+        this->clear();
+      }
+      if (this->page_ != nullptr) {
+        this->page_->get_writer()(*this);
+      } else if (this->writer_.has_value()) {
+        (*this->writer_)(*this);
+      } else {
+        this->test_card();
+      }
+#if ESPHOME_LOG_LEVEL == ESPHOME_LOG_LEVEL_VERBOSE
+      esph_log_v(TAG, "Drawing from line %d took %dms", this->start_line_, millis() - lap);
+      lap = millis();
+#endif
+      if (this->x_low_ > this->x_high_ || this->y_low_ > this->y_high_)
+        return;
+      esph_log_v(TAG, "x_low %d, y_low %d, x_high %d, y_high %d", this->x_low_, this->y_low_, this->x_high_,
+                 this->y_high_);
+      // Some chips require that the drawing window be aligned on certain boundaries
+      auto dr = this->draw_rounding_;
+      this->x_low_ = this->x_low_ / dr * dr;
+      this->y_low_ = this->y_low_ / dr * dr;
+      this->x_high_ = (this->x_high_ + dr) / dr * dr - 1;
+      this->y_high_ = (this->y_high_ + dr) / dr * dr - 1;
+      int w = this->x_high_ - this->x_low_ + 1;
+      int h = this->y_high_ - this->y_low_ + 1;
+      this->write_to_display_(this->x_low_, this->y_low_, w, h, this->buffer_, this->x_low_,
+                              this->y_low_ - this->start_line_, WIDTH - w);
+      // invalidate watermarks
+      this->x_low_ = WIDTH;
+      this->y_low_ = HEIGHT;
+      this->x_high_ = 0;
+      this->y_high_ = 0;
+#if ESPHOME_LOG_LEVEL == ESPHOME_LOG_LEVEL_VERBOSE
+      esph_log_v(TAG, "Write to display took %dms", millis() - lap);
+      lap = millis();
+#endif
+    }
+#if ESPHOME_LOG_LEVEL == ESPHOME_LOG_LEVEL_VERBOSE
+    esph_log_v(TAG, "Total update took %dms", millis() - now);
+#endif
+  }
+
+  // Draw a pixel at the given coordinates.
+  void draw_pixel_at(int x, int y, Color color) override {
+    rotate_coordinates_(x, y);
+    if (x < 0 || x >= WIDTH || y < this->start_line_ || y >= this->end_line_)
+      return;
+    this->buffer_[(y - this->start_line_) * WIDTH + x] = convert_color_(color);
+    if (x < this->x_low_) {
+      this->x_low_ = x;
+    }
+    if (x > this->x_high_) {
+      this->x_high_ = x;
+    }
+    if (y < this->y_low_) {
+      this->y_low_ = y;
+    }
+    if (y > this->y_high_) {
+      this->y_high_ = y;
+    }
+  }
+
+  // Fills the display with a color.
+  void fill(Color color) override {
+    this->x_low_ = 0;
+    this->y_low_ = this->start_line_;
+    this->x_high_ = WIDTH - 1;
+    this->y_high_ = this->end_line_ - 1;
+    std::fill_n(this->buffer_, HEIGHT * WIDTH / FRACTION, convert_color_(color));
+  }
+
+  int get_width() override {
+    if constexpr (ROTATION == display::DISPLAY_ROTATION_90_DEGREES || ROTATION == display::DISPLAY_ROTATION_270_DEGREES)
+      return HEIGHT;
+    return WIDTH;
+  }
+
+  int get_height() override {
+    if constexpr (ROTATION == display::DISPLAY_ROTATION_90_DEGREES || ROTATION == display::DISPLAY_ROTATION_270_DEGREES)
+      return WIDTH;
+    return HEIGHT;
+  }
+
+ protected:
+  // Rotate the coordinates to match the display orientation.
+  void rotate_coordinates_(int &x, int &y) const {
+    if constexpr (ROTATION == display::DISPLAY_ROTATION_180_DEGREES) {
+      x = WIDTH - x - 1;
+      y = HEIGHT - y - 1;
+    } else if constexpr (ROTATION == display::DISPLAY_ROTATION_90_DEGREES) {
+      auto tmp = x;
+      x = WIDTH - y - 1;
+      y = tmp;
+    } else if constexpr (ROTATION == display::DISPLAY_ROTATION_270_DEGREES) {
+      auto tmp = y;
+      y = HEIGHT - x - 1;
+      x = tmp;
+    }
+  }
+
+  // Convert a color to the buffer pixel format.
+  BUFFERTYPE convert_color_(Color &color) const {
+    if constexpr (BUFFERPIXEL == PIXEL_MODE_8) {
+      return (color.red & 0xE0) | (color.g & 0xE0) >> 3 | color.b >> 6;
+    } else if constexpr (BUFFERPIXEL == PIXEL_MODE_16) {
+      if constexpr (IS_BIG_ENDIAN) {
+        return (color.r & 0xF8) | color.g >> 5 | (color.g & 0x1C) << 11 | (color.b & 0xF8) << 5;
+      } else {
+        return (color.r & 0xF8) << 8 | (color.g & 0xFC) << 3 | color.b >> 3;
+      }
+    }
+    return static_cast<BUFFERTYPE>(0);
+  }
+
+  BUFFERTYPE *buffer_{};
+  uint16_t x_low_{WIDTH};
+  uint16_t y_low_{HEIGHT};
+  uint16_t x_high_{0};
+  uint16_t y_high_{0};
+  uint16_t start_line_{0};
+  uint16_t end_line_{1};
+};
+
 }  // namespace mipi_spi
 }  // namespace esphome

esphome/components/mipi_spi/models/adafruit.py

@@ -0,0 +1,30 @@
+from .ili import ST7789V
+
+ST7789V.extend(
+    "ADAFRUIT-FUNHOUSE",
+    height=240,
+    width=240,
+    offset_height=0,
+    offset_width=0,
+    cs_pin=40,
+    dc_pin=39,
+    reset_pin=41,
+    invert_colors=True,
+    mirror_x=True,
+    mirror_y=True,
+    data_rate="80MHz",
+)
+
+ST7789V.extend(
+    "ADAFRUIT-S2-TFT-FEATHER",
+    height=240,
+    width=135,
+    offset_height=52,
+    offset_width=40,
+    cs_pin=7,
+    dc_pin=39,
+    reset_pin=40,
+    invert_colors=True,
+)
+
+models = {}

esphome/components/mipi_spi/models/amoled.py

@@ -67,6 +67,14 @@ RM690B0 = DriverChip(
     ),
 )
 
-T4_S3_AMOLED = RM690B0.extend("T4-S3", width=450, offset_width=16, bus_mode=TYPE_QUAD)
+T4_S3_AMOLED = RM690B0.extend(
+    "T4-S3",
+    width=450,
+    offset_width=16,
+    cs_pin=11,
+    reset_pin=13,
+    enable_pin=9,
+    bus_mode=TYPE_QUAD,
+)
 
 models = {}

esphome/components/mipi_spi/models/waveshare.py

@@ -1,3 +1,5 @@
+import esphome.config_validation as cv
+
 from . import DriverChip
 from .ili import ILI9488_A
 
@@ -128,6 +130,7 @@ DriverChip(
 
 ILI9488_A.extend(
     "PICO-RESTOUCH-LCD-3.5",
+    swap_xy=cv.UNDEFINED,
     spi_16=True,
     pixel_mode="16bit",
     mirror_x=True,

esphome/components/mqtt/mqtt_alarm_control_panel.cpp

@@ -55,7 +55,8 @@ void MQTTAlarmControlPanelComponent::dump_config() {
 }
 
 void MQTTAlarmControlPanelComponent::send_discovery(JsonObject root, mqtt::SendDiscoveryConfig &config) {
-  JsonArray supported_features = root.createNestedArray(MQTT_SUPPORTED_FEATURES);
+  // NOLINTNEXTLINE(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
+  JsonArray supported_features = root[MQTT_SUPPORTED_FEATURES].to<JsonArray>();
   const uint32_t acp_supported_features = this->alarm_control_panel_->get_supported_features();
   if (acp_supported_features & ACP_FEAT_ARM_AWAY) {
     supported_features.add("arm_away");

esphome/components/mqtt/mqtt_backend_esp32.cpp

@@ -153,11 +153,15 @@ void MQTTBackendESP32::mqtt_event_handler_(const Event &event) {
     case MQTT_EVENT_DATA: {
       static std::string topic;
       if (!event.topic.empty()) {
+        // When a single message arrives as multiple chunks, the topic will be empty
+        // on any but the first message, leading to event.topic being an empty string.
+        // To ensure handlers get the correct topic, cache the last seen topic to
+        // simulate always receiving the topic from underlying library
         topic = event.topic;
       }
       ESP_LOGV(TAG, "MQTT_EVENT_DATA %s", topic.c_str());
-      this->on_message_.call(!event.topic.empty() ? topic.c_str() : nullptr, event.data.data(), event.data.size(),
-                             event.current_data_offset, event.total_data_len);
+      this->on_message_.call(topic.c_str(), event.data.data(), event.data.size(), event.current_data_offset,
+                             event.total_data_len);
     } break;
     case MQTT_EVENT_ERROR:
       ESP_LOGE(TAG, "MQTT_EVENT_ERROR");

esphome/components/mqtt/mqtt_binary_sensor.cpp

@@ -30,6 +30,7 @@ MQTTBinarySensorComponent::MQTTBinarySensorComponent(binary_sensor::BinarySensor
 }
 
 void MQTTBinarySensorComponent::send_discovery(JsonObject root, mqtt::SendDiscoveryConfig &config) {
+  // NOLINTNEXTLINE(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
   if (!this->binary_sensor_->get_device_class().empty())
     root[MQTT_DEVICE_CLASS] = this->binary_sensor_->get_device_class();
   if (this->binary_sensor_->is_status_binary_sensor())

esphome/components/mqtt/mqtt_button.cpp

@@ -31,9 +31,12 @@ void MQTTButtonComponent::dump_config() {
 }
 
 void MQTTButtonComponent::send_discovery(JsonObject root, mqtt::SendDiscoveryConfig &config) {
+  // NOLINTBEGIN(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
   config.state_topic = false;
-  if (!this->button_->get_device_class().empty())
+  if (!this->button_->get_device_class().empty()) {
     root[MQTT_DEVICE_CLASS] = this->button_->get_device_class();
+  }
+  // NOLINTEND(clang-analyzer-cplusplus.NewDeleteLeaks)
 }
 
 std::string MQTTButtonComponent::component_type() const { return "button"; }

esphome/components/mqtt/mqtt_client.cpp

@@ -92,6 +92,7 @@ void MQTTClientComponent::send_device_info_() {
   std::string topic = "esphome/discover/";
   topic.append(App.get_name());
 
+  // NOLINTBEGIN(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
   this->publish_json(
       topic,
       [](JsonObject root) {
@@ -147,6 +148,7 @@ void MQTTClientComponent::send_device_info_() {
 #endif
       },
       2, this->discovery_info_.retain);
+  // NOLINTEND(clang-analyzer-cplusplus.NewDeleteLeaks)
 }
 
 void MQTTClientComponent::dump_config() {

esphome/components/mqtt/mqtt_climate.cpp

@@ -14,6 +14,7 @@ static const char *const TAG = "mqtt.climate";
 using namespace esphome::climate;
 
 void MQTTClimateComponent::send_discovery(JsonObject root, mqtt::SendDiscoveryConfig &config) {
+  // NOLINTBEGIN(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
   auto traits = this->device_->get_traits();
   // current_temperature_topic
   if (traits.get_supports_current_temperature()) {
@@ -28,7 +29,7 @@ void MQTTClimateComponent::send_discovery(JsonObject root, mqtt::SendDiscoveryCo
   // mode_state_topic
   root[MQTT_MODE_STATE_TOPIC] = this->get_mode_state_topic();
   // modes
-  JsonArray modes = root.createNestedArray(MQTT_MODES);
+  JsonArray modes = root[MQTT_MODES].to<JsonArray>();
   // sort array for nice UI in HA
   if (traits.supports_mode(CLIMATE_MODE_AUTO))
     modes.add("auto");
@@ -89,7 +90,7 @@ void MQTTClimateComponent::send_discovery(JsonObject root, mqtt::SendDiscoveryCo
     // preset_mode_state_topic
     root[MQTT_PRESET_MODE_STATE_TOPIC] = this->get_preset_state_topic();
     // presets
-    JsonArray presets = root.createNestedArray("preset_modes");
+    JsonArray presets = root["preset_modes"].to<JsonArray>();
     if (traits.supports_preset(CLIMATE_PRESET_HOME))
       presets.add("home");
     if (traits.supports_preset(CLIMATE_PRESET_AWAY))
@@ -119,7 +120,7 @@ void MQTTClimateComponent::send_discovery(JsonObject root, mqtt::SendDiscoveryCo
     // fan_mode_state_topic
     root[MQTT_FAN_MODE_STATE_TOPIC] = this->get_fan_mode_state_topic();
     // fan_modes
-    JsonArray fan_modes = root.createNestedArray("fan_modes");
+    JsonArray fan_modes = root["fan_modes"].to<JsonArray>();
     if (traits.supports_fan_mode(CLIMATE_FAN_ON))
       fan_modes.add("on");
     if (traits.supports_fan_mode(CLIMATE_FAN_OFF))
@@ -150,7 +151,7 @@ void MQTTClimateComponent::send_discovery(JsonObject root, mqtt::SendDiscoveryCo
     // swing_mode_state_topic
     root[MQTT_SWING_MODE_STATE_TOPIC] = this->get_swing_mode_state_topic();
     // swing_modes
-    JsonArray swing_modes = root.createNestedArray("swing_modes");
+    JsonArray swing_modes = root["swing_modes"].to<JsonArray>();
     if (traits.supports_swing_mode(CLIMATE_SWING_OFF))
       swing_modes.add("off");
     if (traits.supports_swing_mode(CLIMATE_SWING_BOTH))
@@ -163,6 +164,7 @@ void MQTTClimateComponent::send_discovery(JsonObject root, mqtt::SendDiscoveryCo
 
   config.state_topic = false;
   config.command_topic = false;
+  // NOLINTEND(clang-analyzer-cplusplus.NewDeleteLeaks)
 }
 void MQTTClimateComponent::setup() {
   auto traits = this->device_->get_traits();

esphome/components/mqtt/mqtt_component.cpp

@@ -70,6 +70,7 @@ bool MQTTComponent::send_discovery_() {
 
   ESP_LOGV(TAG, "'%s': Sending discovery", this->friendly_name().c_str());
 
+  // NOLINTBEGIN(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
   return global_mqtt_client->publish_json(
       this->get_discovery_topic_(discovery_info),
       [this](JsonObject root) {
@@ -128,21 +129,16 @@ bool MQTTComponent::send_discovery_() {
             root[MQTT_PAYLOAD_NOT_AVAILABLE] = this->availability_->payload_not_available;
         }
 
-        std::string unique_id = this->unique_id();
         const MQTTDiscoveryInfo &discovery_info = global_mqtt_client->get_discovery_info();
-        if (!unique_id.empty()) {
-          root[MQTT_UNIQUE_ID] = unique_id;
+        if (discovery_info.unique_id_generator == MQTT_MAC_ADDRESS_UNIQUE_ID_GENERATOR) {
+          char friendly_name_hash[9];
+          sprintf(friendly_name_hash, "%08" PRIx32, fnv1_hash(this->friendly_name()));
+          friendly_name_hash[8] = 0;  // ensure the hash-string ends with null
+          root[MQTT_UNIQUE_ID] = get_mac_address() + "-" + this->component_type() + "-" + friendly_name_hash;
         } else {
-          if (discovery_info.unique_id_generator == MQTT_MAC_ADDRESS_UNIQUE_ID_GENERATOR) {
-            char friendly_name_hash[9];
-            sprintf(friendly_name_hash, "%08" PRIx32, fnv1_hash(this->friendly_name()));
-            friendly_name_hash[8] = 0;  // ensure the hash-string ends with null
-            root[MQTT_UNIQUE_ID] = get_mac_address() + "-" + this->component_type() + "-" + friendly_name_hash;
-          } else {
-            // default to almost-unique ID. It's a hack but the only way to get that
-            // gorgeous device registry view.
-            root[MQTT_UNIQUE_ID] = "ESP" + this->component_type() + this->get_default_object_id_();
-          }
+          // default to almost-unique ID. It's a hack but the only way to get that
+          // gorgeous device registry view.
+          root[MQTT_UNIQUE_ID] = "ESP" + this->component_type() + this->get_default_object_id_();
         }
 
         const std::string &node_name = App.get_name();
@@ -155,7 +151,7 @@ bool MQTTComponent::send_discovery_() {
         }
         std::string node_area = App.get_area();
 
-        JsonObject device_info = root.createNestedObject(MQTT_DEVICE);
+        JsonObject device_info = root[MQTT_DEVICE].to<JsonObject>();
         const auto mac = get_mac_address();
         device_info[MQTT_DEVICE_IDENTIFIERS] = mac;
         device_info[MQTT_DEVICE_NAME] = node_friendly_name;
@@ -192,6 +188,7 @@ bool MQTTComponent::send_discovery_() {
         device_info[MQTT_DEVICE_CONNECTIONS][0][1] = mac;
       },
       this->qos_, discovery_info.retain);
+  // NOLINTEND(clang-analyzer-cplusplus.NewDeleteLeaks)
 }
 
 uint8_t MQTTComponent::get_qos() const { return this->qos_; }
@@ -284,7 +281,6 @@ void MQTTComponent::call_dump_config() {
   this->dump_config();
 }
 void MQTTComponent::schedule_resend_state() { this->resend_state_ = true; }
-std::string MQTTComponent::unique_id() { return ""; }
 bool MQTTComponent::is_connected_() const { return global_mqtt_client->is_connected(); }
 
 // Pull these properties from EntityBase if not overridden