Add buttons platform to Marantz IR Remote (PM6006)

Adds the three commands not exposed by the media player as button
entities: Speaker A/B, Source Direct, and Loudness. Each press alternates
the RC-5 toggle bit shared with the media player.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.strict-typing

@@ -355,6 +355,7 @@ homeassistant.components.lunatone.*
 homeassistant.components.lutron.*
 homeassistant.components.madvr.*
 homeassistant.components.manual.*
+homeassistant.components.marantz_infrared.*
 homeassistant.components.mastodon.*
 homeassistant.components.matrix.*
 homeassistant.components.matter.*

CODEOWNERS

@@ -1040,6 +1040,8 @@ CLAUDE.md @home-assistant/core
 /tests/components/lyric/ @timmo001
 /homeassistant/components/madvr/ @iloveicedgreentea
 /tests/components/madvr/ @iloveicedgreentea
+/homeassistant/components/marantz_infrared/ @home-assistant/core
+/tests/components/marantz_infrared/ @home-assistant/core
 /homeassistant/components/mastodon/ @fabaff @andrew-codechimp
 /tests/components/mastodon/ @fabaff @andrew-codechimp
 /homeassistant/components/matrix/ @PaarthShah

homeassistant/brands/marantz.json

@@ -0,0 +1,5 @@
+{
+  "domain": "marantz",
+  "name": "Marantz",
+  "integrations": ["marantz", "marantz_infrared"]
+}

homeassistant/components/marantz_infrared/__init__.py

@@ -0,0 +1,37 @@
+"""Marantz IR Remote integration for Home Assistant."""
+
+from dataclasses import dataclass
+
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import Platform
+from homeassistant.core import HomeAssistant
+
+PLATFORMS = [Platform.BUTTON, Platform.MEDIA_PLAYER]
+
+
+@dataclass
+class MarantzIrRuntimeData:
+    """Runtime data for a Marantz IR config entry.
+
+    The RC-5 toggle bit must alternate between distinct key presses so
+    the receiver can distinguish a new press from a held-down repeat.
+    The toggle is tracked at the device level (one value per config
+    entry) so all entities — buttons and the media player — share it.
+    """
+
+    toggle: int = 0
+
+
+type MarantzIrConfigEntry = ConfigEntry[MarantzIrRuntimeData]
+
+
+async def async_setup_entry(hass: HomeAssistant, entry: MarantzIrConfigEntry) -> bool:
+    """Set up Marantz IR from a config entry."""
+    entry.runtime_data = MarantzIrRuntimeData()
+    await hass.config_entries.async_forward_entry_setups(entry, PLATFORMS)
+    return True
+
+
+async def async_unload_entry(hass: HomeAssistant, entry: MarantzIrConfigEntry) -> bool:
+    """Unload a Marantz IR config entry."""
+    return await hass.config_entries.async_unload_platforms(entry, PLATFORMS)

homeassistant/components/marantz_infrared/button.py

@@ -0,0 +1,80 @@
+"""Button platform for Marantz IR integration.
+
+Only commands that aren't already exposed by the media player live here:
+speaker A/B, source-direct toggle, and loudness toggle.
+"""
+
+from dataclasses import dataclass
+
+from infrared_protocols.codes.marantz.pm6006 import MarantzPM6006Code
+
+from homeassistant.components.button import ButtonEntity, ButtonEntityDescription
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
+
+from . import MarantzIrConfigEntry
+from .const import CONF_INFRARED_ENTITY_ID, CONF_MODEL, MarantzModel
+from .entity import MarantzIrEntity
+
+PARALLEL_UPDATES = 1
+
+
+@dataclass(frozen=True, kw_only=True)
+class MarantzIrButtonEntityDescription(ButtonEntityDescription):
+    """Describes Marantz IR button entity."""
+
+    command_code: MarantzPM6006Code
+
+
+PM6006_BUTTON_DESCRIPTIONS: tuple[MarantzIrButtonEntityDescription, ...] = (
+    MarantzIrButtonEntityDescription(
+        key="speaker_ab",
+        translation_key="speaker_ab",
+        command_code=MarantzPM6006Code.SPEAKER_AB,
+    ),
+    MarantzIrButtonEntityDescription(
+        key="source_direct",
+        translation_key="source_direct",
+        command_code=MarantzPM6006Code.SOURCE_DIRECT,
+    ),
+    MarantzIrButtonEntityDescription(
+        key="loudness",
+        translation_key="loudness",
+        command_code=MarantzPM6006Code.LOUDNESS,
+    ),
+)
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    entry: MarantzIrConfigEntry,
+    async_add_entities: AddConfigEntryEntitiesCallback,
+) -> None:
+    """Set up Marantz IR buttons from config entry."""
+    infrared_entity_id = entry.data[CONF_INFRARED_ENTITY_ID]
+    model = entry.data[CONF_MODEL]
+    if model == MarantzModel.PM6006:
+        async_add_entities(
+            MarantzIrButton(entry, infrared_entity_id, description)
+            for description in PM6006_BUTTON_DESCRIPTIONS
+        )
+
+
+class MarantzIrButton(MarantzIrEntity, ButtonEntity):
+    """Marantz IR button entity."""
+
+    entity_description: MarantzIrButtonEntityDescription
+
+    def __init__(
+        self,
+        entry: MarantzIrConfigEntry,
+        infrared_entity_id: str,
+        description: MarantzIrButtonEntityDescription,
+    ) -> None:
+        """Initialize Marantz IR button."""
+        super().__init__(entry, infrared_entity_id, unique_id_suffix=description.key)
+        self.entity_description = description
+
+    async def async_press(self) -> None:
+        """Press the button."""
+        await self._send_command(self.entity_description.command_code)

homeassistant/components/marantz_infrared/config_flow.py

@@ -0,0 +1,77 @@
+"""Config flow for Marantz IR integration."""
+
+from typing import Any
+
+import voluptuous as vol
+
+from homeassistant.components.infrared import (
+    DOMAIN as INFRARED_DOMAIN,
+    async_get_emitters,
+)
+from homeassistant.config_entries import ConfigFlow, ConfigFlowResult
+from homeassistant.helpers import entity_registry as er
+from homeassistant.helpers.selector import (
+    EntitySelector,
+    EntitySelectorConfig,
+    SelectSelector,
+    SelectSelectorConfig,
+    SelectSelectorMode,
+)
+
+from .const import CONF_INFRARED_ENTITY_ID, CONF_MODEL, DOMAIN, MarantzModel
+
+MODEL_NAMES: dict[MarantzModel, str] = {
+    MarantzModel.PM6006: "PM6006",
+}
+
+
+class MarantzIrConfigFlow(ConfigFlow, domain=DOMAIN):
+    """Handle config flow for Marantz IR."""
+
+    VERSION = 1
+
+    async def async_step_user(
+        self, user_input: dict[str, Any] | None = None
+    ) -> ConfigFlowResult:
+        """Handle the initial step."""
+        emitter_entity_ids = async_get_emitters(self.hass)
+        if not emitter_entity_ids:
+            return self.async_abort(reason="no_emitters")
+
+        if user_input is not None:
+            entity_id = user_input[CONF_INFRARED_ENTITY_ID]
+            model = user_input[CONF_MODEL]
+
+            await self.async_set_unique_id(f"marantz_ir_{model}_{entity_id}")
+            self._abort_if_unique_id_configured()
+
+            ent_reg = er.async_get(self.hass)
+            entry = ent_reg.async_get(entity_id)
+            entity_name = (
+                entry.name or entry.original_name or entity_id if entry else entity_id
+            )
+            model_name = MODEL_NAMES[MarantzModel(model)]
+            title = f"Marantz {model_name} via {entity_name}"
+
+            return self.async_create_entry(title=title, data=user_input)
+
+        return self.async_show_form(
+            step_id="user",
+            data_schema=vol.Schema(
+                {
+                    vol.Required(CONF_MODEL): SelectSelector(
+                        SelectSelectorConfig(
+                            options=[model.value for model in MarantzModel],
+                            translation_key=CONF_MODEL,
+                            mode=SelectSelectorMode.DROPDOWN,
+                        )
+                    ),
+                    vol.Required(CONF_INFRARED_ENTITY_ID): EntitySelector(
+                        EntitySelectorConfig(
+                            domain=INFRARED_DOMAIN,
+                            include_entities=emitter_entity_ids,
+                        )
+                    ),
+                }
+            ),
+        )

homeassistant/components/marantz_infrared/const.py

@@ -0,0 +1,13 @@
+"""Constants for the Marantz IR integration."""
+
+from enum import StrEnum
+
+DOMAIN = "marantz_infrared"
+CONF_INFRARED_ENTITY_ID = "infrared_entity_id"
+CONF_MODEL = "model"
+
+
+class MarantzModel(StrEnum):
+    """Supported Marantz models."""
+
+    PM6006 = "pm6006"

homeassistant/components/marantz_infrared/entity.py

@@ -0,0 +1,97 @@
+"""Common entity for Marantz IR integration."""
+
+import logging
+from types import ModuleType
+
+from infrared_protocols.codes.marantz import pm6006
+
+from homeassistant.components.infrared import async_send_command
+from homeassistant.const import STATE_UNAVAILABLE
+from homeassistant.core import Event, EventStateChangedData, callback
+from homeassistant.helpers.device_registry import DeviceInfo
+from homeassistant.helpers.entity import Entity
+from homeassistant.helpers.event import async_track_state_change_event
+
+from . import MarantzIrConfigEntry
+from .const import CONF_MODEL, DOMAIN, MarantzModel
+
+_LOGGER = logging.getLogger(__name__)
+
+# Each supported model points at the library module that exposes its codes
+# and the ``MODEL_ID`` / ``MODEL_NAME`` constants used for the device
+# registry entry.
+_MODEL_MODULES: dict[MarantzModel, ModuleType] = {
+    MarantzModel.PM6006: pm6006,
+}
+
+
+class MarantzIrEntity(Entity):
+    """Marantz IR base entity."""
+
+    _attr_has_entity_name = True
+
+    def __init__(
+        self,
+        entry: MarantzIrConfigEntry,
+        infrared_entity_id: str,
+        unique_id_suffix: str,
+    ) -> None:
+        """Initialize Marantz IR entity."""
+        self._infrared_entity_id = infrared_entity_id
+        self._runtime_data = entry.runtime_data
+        self._attr_unique_id = f"{entry.entry_id}_{unique_id_suffix}"
+        model_module = _MODEL_MODULES[MarantzModel(entry.data[CONF_MODEL])]
+        self._make_command = model_module.make_command
+        self._attr_device_info = DeviceInfo(
+            identifiers={(DOMAIN, entry.entry_id)},
+            name=f"Marantz {model_module.MODEL_NAME}",
+            manufacturer="Marantz",
+            model=model_module.MODEL_ID,
+        )
+
+    async def async_added_to_hass(self) -> None:
+        """Subscribe to infrared entity state changes."""
+        await super().async_added_to_hass()
+
+        @callback
+        def _async_ir_state_changed(event: Event[EventStateChangedData]) -> None:
+            """Handle infrared entity state changes."""
+            new_state = event.data["new_state"]
+            ir_available = (
+                new_state is not None and new_state.state != STATE_UNAVAILABLE
+            )
+            if ir_available != self.available:
+                _LOGGER.info(
+                    "Infrared entity %s used by %s is %s",
+                    self._infrared_entity_id,
+                    self.entity_id,
+                    "available" if ir_available else "unavailable",
+                )
+
+                self._attr_available = ir_available
+                self.async_write_ha_state()
+
+        self.async_on_remove(
+            async_track_state_change_event(
+                self.hass, [self._infrared_entity_id], _async_ir_state_changed
+            )
+        )
+
+        ir_state = self.hass.states.get(self._infrared_entity_id)
+        self._attr_available = (
+            ir_state is not None and ir_state.state != STATE_UNAVAILABLE
+        )
+
+    async def _send_command(self, code: pm6006.MarantzPM6006Code) -> None:
+        """Send an IR command using the Marantz protocol.
+
+        Flips the RC-5 toggle bit before each frame so the receiver
+        treats consecutive presses as new presses, not as a held repeat.
+        """
+        self._runtime_data.toggle ^= 1
+        await async_send_command(
+            self.hass,
+            self._infrared_entity_id,
+            self._make_command(code, toggle=self._runtime_data.toggle),
+            context=self._context,
+        )

homeassistant/components/marantz_infrared/manifest.json

@@ -0,0 +1,11 @@
+{
+  "domain": "marantz_infrared",
+  "name": "Marantz Infrared",
+  "codeowners": ["@home-assistant/core"],
+  "config_flow": true,
+  "dependencies": ["infrared"],
+  "documentation": "https://www.home-assistant.io/integrations/marantz_infrared",
+  "integration_type": "device",
+  "iot_class": "assumed_state",
+  "quality_scale": "silver"
+}

homeassistant/components/marantz_infrared/media_player.py

@@ -0,0 +1,100 @@
+"""Media player platform for Marantz IR integration."""
+
+from infrared_protocols.codes.marantz.pm6006 import MarantzPM6006Code
+
+from homeassistant.components.media_player import (
+    MediaPlayerDeviceClass,
+    MediaPlayerEntity,
+    MediaPlayerEntityFeature,
+    MediaPlayerState,
+)
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
+
+from . import MarantzIrConfigEntry
+from .const import CONF_INFRARED_ENTITY_ID, CONF_MODEL, MarantzModel
+from .entity import MarantzIrEntity
+
+PARALLEL_UPDATES = 1
+
+# The Optical button on the amp toggles between the two optical inputs and
+# the receiver remembers which one was last used, so we cannot deterministically
+# pick between Optical 1 and Optical 2 over IR. We expose a single Optical
+# entry that just sends the toggle and let the user press again to switch.
+SOURCE_TO_CODE: dict[str, MarantzPM6006Code] = {
+    "CD": MarantzPM6006Code.SOURCE_CD,
+    "Coax": MarantzPM6006Code.SOURCE_COAX,
+    "Network": MarantzPM6006Code.SOURCE_NETWORK,
+    "Optical": MarantzPM6006Code.SOURCE_OPTICAL,
+    "Phono": MarantzPM6006Code.SOURCE_PHONO,
+    "Recorder": MarantzPM6006Code.SOURCE_CDR,
+    "Tuner": MarantzPM6006Code.SOURCE_TUNER,
+}
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    entry: MarantzIrConfigEntry,
+    async_add_entities: AddConfigEntryEntitiesCallback,
+) -> None:
+    """Set up Marantz IR media player from config entry."""
+    infrared_entity_id = entry.data[CONF_INFRARED_ENTITY_ID]
+    model = entry.data[CONF_MODEL]
+    if model == MarantzModel.PM6006:
+        async_add_entities([MarantzIrAmplifierMediaPlayer(entry, infrared_entity_id)])
+
+
+class MarantzIrAmplifierMediaPlayer(MarantzIrEntity, MediaPlayerEntity):
+    """Marantz IR amplifier media player entity."""
+
+    _attr_name = None
+    _attr_assumed_state = True
+    _attr_device_class = MediaPlayerDeviceClass.RECEIVER
+    _attr_source_list = list(SOURCE_TO_CODE)
+    _attr_supported_features = (
+        MediaPlayerEntityFeature.TURN_ON
+        | MediaPlayerEntityFeature.TURN_OFF
+        | MediaPlayerEntityFeature.VOLUME_STEP
+        | MediaPlayerEntityFeature.VOLUME_MUTE
+        | MediaPlayerEntityFeature.SELECT_SOURCE
+    )
+
+    def __init__(self, entry: MarantzIrConfigEntry, infrared_entity_id: str) -> None:
+        """Initialize Marantz IR amplifier media player."""
+        super().__init__(entry, infrared_entity_id, unique_id_suffix="media_player")
+        self._attr_state = MediaPlayerState.ON
+
+    async def async_turn_on(self) -> None:
+        """Send the power toggle and assume the amplifier is now on.
+
+        Marantz integrated amplifiers expose only a single POWER toggle
+        over IR — there are no discrete on/off codes — so turn-on and
+        turn-off send the same frame and rely on assumed_state.
+        """
+        await self._send_command(MarantzPM6006Code.POWER)
+        self._attr_state = MediaPlayerState.ON
+        self.async_write_ha_state()
+
+    async def async_turn_off(self) -> None:
+        """Send the power toggle and assume the amplifier is now off."""
+        await self._send_command(MarantzPM6006Code.POWER)
+        self._attr_state = MediaPlayerState.OFF
+        self.async_write_ha_state()
+
+    async def async_volume_up(self) -> None:
+        """Send volume up command."""
+        await self._send_command(MarantzPM6006Code.VOLUME_UP)
+
+    async def async_volume_down(self) -> None:
+        """Send volume down command."""
+        await self._send_command(MarantzPM6006Code.VOLUME_DOWN)
+
+    async def async_mute_volume(self, mute: bool) -> None:
+        """Send mute command."""
+        await self._send_command(MarantzPM6006Code.MUTE)
+
+    async def async_select_source(self, source: str) -> None:
+        """Select an input source."""
+        await self._send_command(SOURCE_TO_CODE[source])
+        self._attr_source = source
+        self.async_write_ha_state()

homeassistant/components/marantz_infrared/quality_scale.yaml

@@ -0,0 +1,110 @@
+rules:
+  # Bronze
+  action-setup:
+    status: exempt
+    comment: |
+      This integration does not provide additional actions.
+  appropriate-polling:
+    status: exempt
+    comment: |
+      This integration does not poll.
+  brands: done
+  common-modules: done
+  config-flow-test-coverage: done
+  config-flow: done
+  dependency-transparency: done
+  docs-actions:
+    status: exempt
+    comment: |
+      This integration does not provide additional actions.
+  docs-high-level-description: done
+  docs-installation-instructions: done
+  docs-removal-instructions: done
+  entity-event-setup: done
+  entity-unique-id: done
+  has-entity-name: done
+  runtime-data: done
+  test-before-configure: done
+  test-before-setup:
+    status: exempt
+    comment: |
+      This integration only proxies commands through an existing infrared
+      entity, so there is no separate connection to validate during setup.
+  unique-config-entry: done
+  # Silver
+  action-exceptions:
+    status: exempt
+    comment: |
+      This integration does not register custom actions.
+  config-entry-unloading: done
+  docs-configuration-parameters: done
+  docs-installation-parameters: done
+  entity-unavailable: done
+  integration-owner: done
+  log-when-unavailable: done
+  parallel-updates: done
+  reauthentication-flow:
+    status: exempt
+    comment: |
+      This integration does not require authentication.
+  test-coverage: done
+  # Gold
+  devices: done
+  diagnostics: todo
+  discovery-update-info:
+    status: exempt
+    comment: |
+      This integration does not support discovery.
+  discovery:
+    status: exempt
+    comment: |
+      This integration is configured manually via config flow.
+  docs-data-update:
+    status: exempt
+    comment: |
+      This integration does not fetch data from devices.
+  docs-examples: todo
+  docs-known-limitations: done
+  docs-supported-devices: done
+  docs-supported-functions: done
+  docs-troubleshooting: todo
+  docs-use-cases: todo
+  dynamic-devices:
+    status: exempt
+    comment: |
+      Each config entry creates a single device.
+  entity-category: done
+  entity-device-class: done
+  entity-disabled-by-default:
+    status: exempt
+    comment: |
+      No entities should be disabled by default.
+  entity-translations: done
+  exception-translations:
+    status: exempt
+    comment: |
+      This integration does not raise exceptions.
+  icon-translations:
+    status: exempt
+    comment: |
+      This integration does not use custom icons.
+  reconfiguration-flow: todo
+  repair-issues:
+    status: exempt
+    comment: |
+      This integration does not have repairable issues.
+  stale-devices:
+    status: exempt
+    comment: |
+      Each config entry manages exactly one device.
+
+  # Platinum
+  async-dependency:
+    status: exempt
+    comment: |
+      This integration has no external dependencies.
+  inject-websession:
+    status: exempt
+    comment: |
+      This integration does not make HTTP requests.
+  strict-typing: done

homeassistant/components/marantz_infrared/strings.json

@@ -0,0 +1,42 @@
+{
+  "config": {
+    "abort": {
+      "already_configured": "This Marantz device has already been configured with this transmitter.",
+      "no_emitters": "No infrared transmitter entities found. Please set up an infrared device first."
+    },
+    "step": {
+      "user": {
+        "data": {
+          "infrared_entity_id": "Infrared transmitter",
+          "model": "Model"
+        },
+        "data_description": {
+          "infrared_entity_id": "The infrared transmitter entity to use for sending commands.",
+          "model": "The Marantz model to control."
+        },
+        "description": "Select the Marantz model and the infrared transmitter entity to use for controlling your Marantz device.",
+        "title": "Set up Marantz IR Remote"
+      }
+    }
+  },
+  "entity": {
+    "button": {
+      "loudness": {
+        "name": "Loudness"
+      },
+      "source_direct": {
+        "name": "Source direct"
+      },
+      "speaker_ab": {
+        "name": "Speaker A/B"
+      }
+    }
+  },
+  "selector": {
+    "model": {
+      "options": {
+        "pm6006": "PM6006"
+      }
+    }
+  }
+}

homeassistant/generated/config_flows.py

@@ -427,6 +427,7 @@ FLOWS = {
         "lyric",
         "madvr",
         "mailgun",
+        "marantz_infrared",
         "mastodon",
         "matter",
         "mcp",

homeassistant/generated/integrations.json

@@ -4020,8 +4020,20 @@
     },
     "marantz": {
       "name": "Marantz",
-      "integration_type": "virtual",
-      "supported_by": "denonavr"
+      "integrations": {
+        "marantz": {
+          "integration_type": "virtual",
+          "config_flow": false,
+          "supported_by": "denonavr",
+          "name": "Marantz"
+        },
+        "marantz_infrared": {
+          "integration_type": "device",
+          "config_flow": true,
+          "iot_class": "assumed_state",
+          "name": "Marantz Infrared"
+        }
+      }
     },
     "martec": {
       "name": "Martec",

mypy.ini

@@ -3305,6 +3305,16 @@ disallow_untyped_defs = true
 warn_return_any = true
 warn_unreachable = true
 
+[mypy-homeassistant.components.marantz_infrared.*]
+check_untyped_defs = true
+disallow_incomplete_defs = true
+disallow_subclassing_any = true
+disallow_untyped_calls = true
+disallow_untyped_decorators = true
+disallow_untyped_defs = true
+warn_return_any = true
+warn_unreachable = true
+
 [mypy-homeassistant.components.mastodon.*]
 check_untyped_defs = true
 disallow_incomplete_defs = true

tests/components/marantz_infrared/__init__.py

@@ -0,0 +1 @@
+"""Tests for the Marantz Infrared integration."""

tests/components/marantz_infrared/conftest.py

@@ -0,0 +1,108 @@
+"""Common fixtures for the Marantz Infrared tests."""
+
+from collections.abc import Generator
+from unittest.mock import patch
+
+from infrared_protocols import Command as InfraredCommand
+import pytest
+
+from homeassistant.components.infrared import (
+    DATA_COMPONENT as INFRARED_DATA_COMPONENT,
+    DOMAIN as INFRARED_DOMAIN,
+    InfraredEntity,
+)
+from homeassistant.components.marantz_infrared import PLATFORMS
+from homeassistant.components.marantz_infrared.const import (
+    CONF_INFRARED_ENTITY_ID,
+    CONF_MODEL,
+    DOMAIN,
+    MarantzModel,
+)
+from homeassistant.const import Platform
+from homeassistant.core import HomeAssistant
+from homeassistant.setup import async_setup_component
+
+from tests.common import MockConfigEntry
+
+MOCK_INFRARED_ENTITY_ID = "infrared.test_ir_transmitter"
+
+
+class MockInfraredEntity(InfraredEntity):
+    """Mock infrared entity for testing."""
+
+    _attr_has_entity_name = True
+    _attr_name = "Test IR transmitter"
+
+    def __init__(self, unique_id: str) -> None:
+        """Initialize mock entity."""
+        self._attr_unique_id = unique_id
+        self.send_command_calls: list[InfraredCommand] = []
+
+    async def async_send_command(self, command: InfraredCommand) -> None:
+        """Mock send command."""
+        self.send_command_calls.append(command)
+
+
+@pytest.fixture
+def mock_config_entry() -> MockConfigEntry:
+    """Return a mock config entry."""
+    return MockConfigEntry(
+        domain=DOMAIN,
+        entry_id="01JTEST0000000000000000000",
+        title="Marantz PM6006 via Test IR transmitter",
+        data={
+            CONF_MODEL: MarantzModel.PM6006,
+            CONF_INFRARED_ENTITY_ID: MOCK_INFRARED_ENTITY_ID,
+        },
+        unique_id=f"marantz_ir_pm6006_{MOCK_INFRARED_ENTITY_ID}",
+    )
+
+
+@pytest.fixture
+def mock_infrared_entity() -> MockInfraredEntity:
+    """Return a mock infrared entity."""
+    return MockInfraredEntity("test_ir_transmitter")
+
+
+@pytest.fixture
+def platforms() -> list[Platform]:
+    """Return platforms to set up."""
+    return PLATFORMS
+
+
+@pytest.fixture
+def mock_make_marantz_amplifier_command() -> Generator[None]:
+    """Patch make_command to return the MarantzPM6006Code directly.
+
+    This allows tests to assert on the high-level code enum value
+    rather than the raw RC-5 timings.
+    """
+    with patch(
+        "infrared_protocols.codes.marantz.pm6006.make_command",
+        side_effect=lambda code, **kwargs: code,
+    ):
+        yield
+
+
+@pytest.fixture
+async def init_integration(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_infrared_entity: MockInfraredEntity,
+    mock_make_marantz_amplifier_command: None,
+    platforms: list[Platform],
+) -> MockConfigEntry:
+    """Set up the Marantz Infrared integration for testing."""
+    assert await async_setup_component(hass, INFRARED_DOMAIN, {})
+    await hass.async_block_till_done()
+
+    infrared_component = hass.data[INFRARED_DATA_COMPONENT]
+    await infrared_component.async_add_entities([mock_infrared_entity])
+
+    mock_config_entry.add_to_hass(hass)
+
+    with patch("homeassistant.components.marantz_infrared.PLATFORMS", platforms):
+        await hass.config_entries.async_setup(mock_config_entry.entry_id)
+        await hass.async_block_till_done()
+
+    return mock_config_entry

tests/components/marantz_infrared/snapshots/test_button.ambr

@@ -0,0 +1,151 @@
+# serializer version: 1
+# name: test_entities[button.marantz_amplifier_pm6006_loudness-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': list([
+      None,
+    ]),
+    'area_id': None,
+    'capabilities': None,
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'button',
+    'entity_category': None,
+    'entity_id': 'button.marantz_amplifier_pm6006_loudness',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'object_id_base': 'Loudness',
+    'options': dict({
+    }),
+    'original_device_class': None,
+    'original_icon': None,
+    'original_name': 'Loudness',
+    'platform': 'marantz_infrared',
+    'previous_unique_id': None,
+    'suggested_object_id': None,
+    'supported_features': 0,
+    'translation_key': 'loudness',
+    'unique_id': '01JTEST0000000000000000000_loudness',
+    'unit_of_measurement': None,
+  })
+# ---
+# name: test_entities[button.marantz_amplifier_pm6006_loudness-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'friendly_name': 'Marantz Amplifier PM6006 Loudness',
+    }),
+    'context': <ANY>,
+    'entity_id': 'button.marantz_amplifier_pm6006_loudness',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': 'unknown',
+  })
+# ---
+# name: test_entities[button.marantz_amplifier_pm6006_source_direct-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': list([
+      None,
+    ]),
+    'area_id': None,
+    'capabilities': None,
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'button',
+    'entity_category': None,
+    'entity_id': 'button.marantz_amplifier_pm6006_source_direct',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'object_id_base': 'Source direct',
+    'options': dict({
+    }),
+    'original_device_class': None,
+    'original_icon': None,
+    'original_name': 'Source direct',
+    'platform': 'marantz_infrared',
+    'previous_unique_id': None,
+    'suggested_object_id': None,
+    'supported_features': 0,
+    'translation_key': 'source_direct',
+    'unique_id': '01JTEST0000000000000000000_source_direct',
+    'unit_of_measurement': None,
+  })
+# ---
+# name: test_entities[button.marantz_amplifier_pm6006_source_direct-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'friendly_name': 'Marantz Amplifier PM6006 Source direct',
+    }),
+    'context': <ANY>,
+    'entity_id': 'button.marantz_amplifier_pm6006_source_direct',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': 'unknown',
+  })
+# ---
+# name: test_entities[button.marantz_amplifier_pm6006_speaker_a_b-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': list([
+      None,
+    ]),
+    'area_id': None,
+    'capabilities': None,
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'button',
+    'entity_category': None,
+    'entity_id': 'button.marantz_amplifier_pm6006_speaker_a_b',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'object_id_base': 'Speaker A/B',
+    'options': dict({
+    }),
+    'original_device_class': None,
+    'original_icon': None,
+    'original_name': 'Speaker A/B',
+    'platform': 'marantz_infrared',
+    'previous_unique_id': None,
+    'suggested_object_id': None,
+    'supported_features': 0,
+    'translation_key': 'speaker_ab',
+    'unique_id': '01JTEST0000000000000000000_speaker_ab',
+    'unit_of_measurement': None,
+  })
+# ---
+# name: test_entities[button.marantz_amplifier_pm6006_speaker_a_b-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'friendly_name': 'Marantz Amplifier PM6006 Speaker A/B',
+    }),
+    'context': <ANY>,
+    'entity_id': 'button.marantz_amplifier_pm6006_speaker_a_b',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': 'unknown',
+  })
+# ---

tests/components/marantz_infrared/snapshots/test_media_player.ambr

@@ -0,0 +1,73 @@
+# serializer version: 1
+# name: test_entities[media_player.marantz_amplifier_pm6006-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': list([
+      None,
+    ]),
+    'area_id': None,
+    'capabilities': dict({
+      'source_list': list([
+        'CD',
+        'Coax',
+        'Network',
+        'Optical',
+        'Phono',
+        'Recorder',
+        'Tuner',
+      ]),
+    }),
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'media_player',
+    'entity_category': None,
+    'entity_id': 'media_player.marantz_amplifier_pm6006',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'object_id_base': None,
+    'options': dict({
+    }),
+    'original_device_class': <MediaPlayerDeviceClass.RECEIVER: 'receiver'>,
+    'original_icon': None,
+    'original_name': None,
+    'platform': 'marantz_infrared',
+    'previous_unique_id': None,
+    'suggested_object_id': None,
+    'supported_features': <MediaPlayerEntityFeature: 3464>,
+    'translation_key': None,
+    'unique_id': '01JTEST0000000000000000000_media_player',
+    'unit_of_measurement': None,
+  })
+# ---
+# name: test_entities[media_player.marantz_amplifier_pm6006-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'assumed_state': True,
+      'device_class': 'receiver',
+      'friendly_name': 'Marantz Amplifier PM6006',
+      'source_list': list([
+        'CD',
+        'Coax',
+        'Network',
+        'Optical',
+        'Phono',
+        'Recorder',
+        'Tuner',
+      ]),
+      'supported_features': <MediaPlayerEntityFeature: 3464>,
+    }),
+    'context': <ANY>,
+    'entity_id': 'media_player.marantz_amplifier_pm6006',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': 'on',
+  })
+# ---

tests/components/marantz_infrared/test_button.py

@@ -0,0 +1,82 @@
+"""Tests for the Marantz Infrared button platform."""
+
+from infrared_protocols.codes.marantz.pm6006 import MarantzPM6006Code
+import pytest
+from syrupy.assertion import SnapshotAssertion
+
+from homeassistant.components.button import DOMAIN as BUTTON_DOMAIN, SERVICE_PRESS
+from homeassistant.const import ATTR_ENTITY_ID, Platform
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers import device_registry as dr, entity_registry as er
+
+from .conftest import MockInfraredEntity
+from .utils import check_availability_follows_ir_entity
+
+from tests.common import MockConfigEntry, snapshot_platform
+
+
+@pytest.fixture
+def platforms() -> list[Platform]:
+    """Return platforms to set up."""
+    return [Platform.BUTTON]
+
+
+@pytest.mark.usefixtures("init_integration")
+async def test_entities(
+    hass: HomeAssistant,
+    snapshot: SnapshotAssertion,
+    entity_registry: er.EntityRegistry,
+    device_registry: dr.DeviceRegistry,
+    mock_config_entry: MockConfigEntry,
+) -> None:
+    """Test all button entities are created with correct attributes."""
+    await snapshot_platform(hass, entity_registry, snapshot, mock_config_entry.entry_id)
+
+    device_entry = device_registry.async_get_device(
+        identifiers={("marantz_infrared", mock_config_entry.entry_id)}
+    )
+    assert device_entry
+    entity_entries = er.async_entries_for_config_entry(
+        entity_registry, mock_config_entry.entry_id
+    )
+    for entity_entry in entity_entries:
+        assert entity_entry.device_id == device_entry.id
+
+
+@pytest.mark.parametrize(
+    ("entity_id", "expected_code"),
+    [
+        ("button.marantz_amplifier_pm6006_speaker_a_b", MarantzPM6006Code.SPEAKER_AB),
+        (
+            "button.marantz_amplifier_pm6006_source_direct",
+            MarantzPM6006Code.SOURCE_DIRECT,
+        ),
+        ("button.marantz_amplifier_pm6006_loudness", MarantzPM6006Code.LOUDNESS),
+    ],
+)
+@pytest.mark.usefixtures("init_integration")
+async def test_button_press_sends_correct_code(
+    hass: HomeAssistant,
+    mock_infrared_entity: MockInfraredEntity,
+    entity_id: str,
+    expected_code: MarantzPM6006Code,
+) -> None:
+    """Test pressing a button sends the correct IR code."""
+    await hass.services.async_call(
+        BUTTON_DOMAIN,
+        SERVICE_PRESS,
+        {ATTR_ENTITY_ID: entity_id},
+        blocking=True,
+    )
+
+    assert len(mock_infrared_entity.send_command_calls) == 1
+    assert mock_infrared_entity.send_command_calls[0] == expected_code
+
+
+@pytest.mark.usefixtures("init_integration")
+async def test_button_availability_follows_ir_entity(
+    hass: HomeAssistant,
+) -> None:
+    """Test button becomes unavailable when IR entity is unavailable."""
+    entity_id = "button.marantz_amplifier_pm6006_loudness"
+    await check_availability_follows_ir_entity(hass, entity_id)

tests/components/marantz_infrared/test_config_flow.py

@@ -0,0 +1,134 @@
+"""Tests for the Marantz Infrared config flow."""
+
+import pytest
+
+from homeassistant.components.infrared import (
+    DATA_COMPONENT as INFRARED_DATA_COMPONENT,
+    DOMAIN as INFRARED_DOMAIN,
+)
+from homeassistant.components.marantz_infrared.const import (
+    CONF_INFRARED_ENTITY_ID,
+    CONF_MODEL,
+    DOMAIN,
+    MarantzModel,
+)
+from homeassistant.config_entries import SOURCE_USER
+from homeassistant.core import HomeAssistant
+from homeassistant.data_entry_flow import FlowResultType
+from homeassistant.helpers import entity_registry as er
+from homeassistant.setup import async_setup_component
+
+from .conftest import MOCK_INFRARED_ENTITY_ID, MockInfraredEntity
+
+from tests.common import MockConfigEntry
+
+
+@pytest.fixture
+async def setup_infrared(
+    hass: HomeAssistant, mock_infrared_entity: MockInfraredEntity
+) -> None:
+    """Set up the infrared component with a mock entity."""
+    assert await async_setup_component(hass, INFRARED_DOMAIN, {})
+    await hass.async_block_till_done()
+
+    component = hass.data[INFRARED_DATA_COMPONENT]
+    await component.async_add_entities([mock_infrared_entity])
+
+
+@pytest.mark.usefixtures("setup_infrared")
+async def test_user_flow_success(
+    hass: HomeAssistant,
+) -> None:
+    """Test successful user config flow."""
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": SOURCE_USER}
+    )
+
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == "user"
+
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        user_input={
+            CONF_MODEL: MarantzModel.PM6006,
+            CONF_INFRARED_ENTITY_ID: MOCK_INFRARED_ENTITY_ID,
+        },
+    )
+
+    assert result["type"] is FlowResultType.CREATE_ENTRY
+    assert result["title"] == "Marantz PM6006 via Test IR transmitter"
+    assert result["data"] == {
+        CONF_MODEL: MarantzModel.PM6006,
+        CONF_INFRARED_ENTITY_ID: MOCK_INFRARED_ENTITY_ID,
+    }
+    assert result["result"].unique_id == f"marantz_ir_pm6006_{MOCK_INFRARED_ENTITY_ID}"
+
+
+@pytest.mark.usefixtures("setup_infrared")
+async def test_user_flow_already_configured(
+    hass: HomeAssistant, mock_config_entry: MockConfigEntry
+) -> None:
+    """Test user flow aborts when entry is already configured."""
+    mock_config_entry.add_to_hass(hass)
+
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": SOURCE_USER}
+    )
+
+    assert result["type"] is FlowResultType.FORM
+
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        user_input={
+            CONF_MODEL: MarantzModel.PM6006,
+            CONF_INFRARED_ENTITY_ID: MOCK_INFRARED_ENTITY_ID,
+        },
+    )
+
+    assert result["type"] is FlowResultType.ABORT
+    assert result["reason"] == "already_configured"
+
+
+async def test_user_flow_no_emitters(hass: HomeAssistant) -> None:
+    """Test user flow aborts when no infrared emitters exist."""
+    assert await async_setup_component(hass, INFRARED_DOMAIN, {})
+    await hass.async_block_till_done()
+
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": SOURCE_USER}
+    )
+
+    assert result["type"] is FlowResultType.ABORT
+    assert result["reason"] == "no_emitters"
+
+
+@pytest.mark.usefixtures("setup_infrared")
+@pytest.mark.parametrize(
+    ("entity_name", "expected_title"),
+    [
+        (None, "Marantz PM6006 via Test IR transmitter"),
+        ("AC IR emitter", "Marantz PM6006 via AC IR emitter"),
+    ],
+)
+async def test_user_flow_title_from_entity_name(
+    hass: HomeAssistant,
+    entity_registry: er.EntityRegistry,
+    entity_name: str | None,
+    expected_title: str,
+) -> None:
+    """Test config entry title uses the entity name."""
+    entity_registry.async_update_entity(MOCK_INFRARED_ENTITY_ID, name=entity_name)
+
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": SOURCE_USER}
+    )
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        user_input={
+            CONF_MODEL: MarantzModel.PM6006,
+            CONF_INFRARED_ENTITY_ID: MOCK_INFRARED_ENTITY_ID,
+        },
+    )
+
+    assert result["type"] is FlowResultType.CREATE_ENTRY
+    assert result["title"] == expected_title

tests/components/marantz_infrared/test_init.py

@@ -0,0 +1,19 @@
+"""Tests for the Marantz Infrared integration setup."""
+
+from homeassistant.config_entries import ConfigEntryState
+from homeassistant.core import HomeAssistant
+
+from tests.common import MockConfigEntry
+
+
+async def test_setup_and_unload_entry(
+    hass: HomeAssistant, init_integration: MockConfigEntry
+) -> None:
+    """Test setting up and unloading a config entry."""
+    entry = init_integration
+    assert entry.state is ConfigEntryState.LOADED
+
+    await hass.config_entries.async_unload(entry.entry_id)
+    await hass.async_block_till_done()
+
+    assert entry.state is ConfigEntryState.NOT_LOADED

tests/components/marantz_infrared/test_media_player.py

@@ -0,0 +1,186 @@
+"""Tests for the Marantz Infrared media player platform."""
+
+from infrared_protocols.codes.marantz.pm6006 import MarantzPM6006Code
+import pytest
+from syrupy.assertion import SnapshotAssertion
+
+from homeassistant.components.media_player import (
+    ATTR_INPUT_SOURCE,
+    ATTR_INPUT_SOURCE_LIST,
+    DOMAIN as MEDIA_PLAYER_DOMAIN,
+    SERVICE_SELECT_SOURCE,
+    SERVICE_TURN_OFF,
+    SERVICE_TURN_ON,
+    SERVICE_VOLUME_DOWN,
+    SERVICE_VOLUME_MUTE,
+    SERVICE_VOLUME_UP,
+)
+from homeassistant.const import ATTR_ENTITY_ID, Platform
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers import device_registry as dr, entity_registry as er
+
+from .conftest import MockInfraredEntity
+from .utils import check_availability_follows_ir_entity
+
+from tests.common import MockConfigEntry, snapshot_platform
+
+MEDIA_PLAYER_ENTITY_ID = "media_player.marantz_amplifier_pm6006"
+
+
+@pytest.fixture
+def platforms() -> list[Platform]:
+    """Return platforms to set up."""
+    return [Platform.MEDIA_PLAYER]
+
+
+@pytest.mark.usefixtures("init_integration")
+async def test_entities(
+    hass: HomeAssistant,
+    snapshot: SnapshotAssertion,
+    entity_registry: er.EntityRegistry,
+    device_registry: dr.DeviceRegistry,
+    mock_config_entry: MockConfigEntry,
+) -> None:
+    """Test the media player entity is created with correct attributes."""
+    await snapshot_platform(hass, entity_registry, snapshot, mock_config_entry.entry_id)
+
+    device_entry = device_registry.async_get_device(
+        identifiers={("marantz_infrared", mock_config_entry.entry_id)}
+    )
+    assert device_entry
+    entity_entries = er.async_entries_for_config_entry(
+        entity_registry, mock_config_entry.entry_id
+    )
+    for entity_entry in entity_entries:
+        assert entity_entry.device_id == device_entry.id
+
+
+@pytest.mark.parametrize(
+    ("service", "service_data", "expected_code"),
+    [
+        (SERVICE_TURN_ON, {}, MarantzPM6006Code.POWER),
+        (SERVICE_TURN_OFF, {}, MarantzPM6006Code.POWER),
+        (SERVICE_VOLUME_UP, {}, MarantzPM6006Code.VOLUME_UP),
+        (SERVICE_VOLUME_DOWN, {}, MarantzPM6006Code.VOLUME_DOWN),
+        (SERVICE_VOLUME_MUTE, {"is_volume_muted": True}, MarantzPM6006Code.MUTE),
+    ],
+)
+@pytest.mark.usefixtures("init_integration")
+async def test_media_player_action_sends_correct_code(
+    hass: HomeAssistant,
+    mock_infrared_entity: MockInfraredEntity,
+    service: str,
+    service_data: dict[str, bool],
+    expected_code: MarantzPM6006Code,
+) -> None:
+    """Test each media player action sends the correct IR code."""
+    await hass.services.async_call(
+        MEDIA_PLAYER_DOMAIN,
+        service,
+        {ATTR_ENTITY_ID: MEDIA_PLAYER_ENTITY_ID, **service_data},
+        blocking=True,
+    )
+
+    assert len(mock_infrared_entity.send_command_calls) == 1
+    assert mock_infrared_entity.send_command_calls[0] == expected_code
+
+
+@pytest.mark.parametrize(
+    ("source", "expected_code"),
+    [
+        ("CD", MarantzPM6006Code.SOURCE_CD),
+        ("Recorder", MarantzPM6006Code.SOURCE_CDR),
+        ("Phono", MarantzPM6006Code.SOURCE_PHONO),
+        ("Tuner", MarantzPM6006Code.SOURCE_TUNER),
+        ("Coax", MarantzPM6006Code.SOURCE_COAX),
+        ("Network", MarantzPM6006Code.SOURCE_NETWORK),
+        ("Optical", MarantzPM6006Code.SOURCE_OPTICAL),
+    ],
+)
+@pytest.mark.usefixtures("init_integration")
+async def test_media_player_select_source(
+    hass: HomeAssistant,
+    mock_infrared_entity: MockInfraredEntity,
+    source: str,
+    expected_code: MarantzPM6006Code,
+) -> None:
+    """Test selecting a source sends the correct IR code and updates state."""
+    await hass.services.async_call(
+        MEDIA_PLAYER_DOMAIN,
+        SERVICE_SELECT_SOURCE,
+        {ATTR_ENTITY_ID: MEDIA_PLAYER_ENTITY_ID, ATTR_INPUT_SOURCE: source},
+        blocking=True,
+    )
+
+    assert mock_infrared_entity.send_command_calls == [expected_code]
+
+    state = hass.states.get(MEDIA_PLAYER_ENTITY_ID)
+    assert state is not None
+    assert state.attributes[ATTR_INPUT_SOURCE] == source
+    assert state.attributes[ATTR_INPUT_SOURCE_LIST] == [
+        "CD",
+        "Coax",
+        "Network",
+        "Optical",
+        "Phono",
+        "Recorder",
+        "Tuner",
+    ]
+
+
+@pytest.mark.usefixtures("init_integration")
+async def test_turn_on_off_update_assumed_state(
+    hass: HomeAssistant,
+    mock_infrared_entity: MockInfraredEntity,
+) -> None:
+    """Both turn-on and turn-off send POWER but assume opposite states."""
+    await hass.services.async_call(
+        MEDIA_PLAYER_DOMAIN,
+        SERVICE_TURN_OFF,
+        {ATTR_ENTITY_ID: MEDIA_PLAYER_ENTITY_ID},
+        blocking=True,
+    )
+    state = hass.states.get(MEDIA_PLAYER_ENTITY_ID)
+    assert state is not None
+    assert state.state == "off"
+
+    await hass.services.async_call(
+        MEDIA_PLAYER_DOMAIN,
+        SERVICE_TURN_ON,
+        {ATTR_ENTITY_ID: MEDIA_PLAYER_ENTITY_ID},
+        blocking=True,
+    )
+    state = hass.states.get(MEDIA_PLAYER_ENTITY_ID)
+    assert state is not None
+    assert state.state == "on"
+
+    assert mock_infrared_entity.send_command_calls == [
+        MarantzPM6006Code.POWER,
+        MarantzPM6006Code.POWER,
+    ]
+
+
+@pytest.mark.usefixtures("init_integration")
+async def test_media_player_availability_follows_ir_entity(
+    hass: HomeAssistant,
+) -> None:
+    """Test media player becomes unavailable when IR entity is unavailable."""
+    await check_availability_follows_ir_entity(hass, MEDIA_PLAYER_ENTITY_ID)
+
+
+async def test_toggle_flips_between_commands(
+    hass: HomeAssistant,
+    init_integration: MockConfigEntry,
+    mock_infrared_entity: MockInfraredEntity,
+) -> None:
+    """The RC-5 toggle bit must alternate so the receiver sees distinct presses."""
+    for expected_toggle in (1, 0, 1, 0):
+        await hass.services.async_call(
+            MEDIA_PLAYER_DOMAIN,
+            SERVICE_VOLUME_UP,
+            {ATTR_ENTITY_ID: MEDIA_PLAYER_ENTITY_ID},
+            blocking=True,
+        )
+        assert init_integration.runtime_data.toggle == expected_toggle
+
+    assert len(mock_infrared_entity.send_command_calls) == 4

tests/components/marantz_infrared/utils.py

@@ -0,0 +1,30 @@
+"""Tests for the Marantz Infrared integration."""
+
+from homeassistant.const import STATE_UNAVAILABLE
+from homeassistant.core import HomeAssistant
+
+from .conftest import MOCK_INFRARED_ENTITY_ID
+
+
+async def check_availability_follows_ir_entity(
+    hass: HomeAssistant,
+    entity_id: str,
+) -> None:
+    """Check that entity becomes unavailable when IR entity is unavailable."""
+    state = hass.states.get(entity_id)
+    assert state is not None
+    assert state.state != STATE_UNAVAILABLE
+
+    hass.states.async_set(MOCK_INFRARED_ENTITY_ID, STATE_UNAVAILABLE)
+    await hass.async_block_till_done()
+
+    state = hass.states.get(entity_id)
+    assert state is not None
+    assert state.state == STATE_UNAVAILABLE
+
+    hass.states.async_set(MOCK_INFRARED_ENTITY_ID, "2026-01-01T00:00:00.000")
+    await hass.async_block_till_done()
+
+    state = hass.states.get(entity_id)
+    assert state is not None
+    assert state.state != STATE_UNAVAILABLE