diff --git a/homeassistant/components/knx/__init__.py b/homeassistant/components/knx/__init__.py
index 01d5294639c..736c5f6cb9d 100644
--- a/homeassistant/components/knx/__init__.py
+++ b/homeassistant/components/knx/__init__.py
@@ -5,6 +5,7 @@ from __future__ import annotations
 import contextlib
 import logging
 from pathlib import Path
+from typing import Final
 
 import voluptuous as vol
 from xknx import XKNX
@@ -59,9 +60,9 @@ from .const import (
     CONF_KNX_TUNNELING_TCP,
     CONF_KNX_TUNNELING_TCP_SECURE,
     DATA_HASS_CONFIG,
-    DATA_KNX_CONFIG,
     DOMAIN,
     KNX_ADDRESS,
+    KNX_MODULE_KEY,
     SUPPORTED_PLATFORMS_UI,
     SUPPORTED_PLATFORMS_YAML,
     TELEGRAM_LOG_DEFAULT,
@@ -97,6 +98,7 @@ from .websocket import register_panel
 
 _LOGGER = logging.getLogger(__name__)
 
+_KNX_YAML_CONFIG: Final = "knx_yaml_config"
 
 CONFIG_SCHEMA = vol.Schema(
     {
@@ -148,7 +150,7 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Start the KNX integration."""
     hass.data[DATA_HASS_CONFIG] = config
     if (conf := config.get(DOMAIN)) is not None:
-        hass.data[DATA_KNX_CONFIG] = dict(conf)
+        hass.data[_KNX_YAML_CONFIG] = dict(conf)
 
     register_knx_services(hass)
     return True
@@ -156,16 +158,12 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Load a config entry."""
-    # `config` is None when reloading the integration
-    # or no `knx` key in configuration.yaml
-    if (config := hass.data.get(DATA_KNX_CONFIG)) is None:
+    # `_KNX_YAML_CONFIG` is only set in async_setup.
+    # It's None when reloading the integration or no `knx` key in configuration.yaml
+    config = hass.data.pop(_KNX_YAML_CONFIG, None)
+    if config is None:
         _conf = await async_integration_yaml_config(hass, DOMAIN)
         if not _conf or DOMAIN not in _conf:
-            _LOGGER.warning(
-                "No `knx:` key found in configuration.yaml. See "
-                "https://www.home-assistant.io/integrations/knx/ "
-                "for KNX entity configuration documentation"
-            )
             # generate defaults
             config = CONFIG_SCHEMA({DOMAIN: {}})[DOMAIN]
         else:
@@ -176,22 +174,22 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     except XKNXException as ex:
         raise ConfigEntryNotReady from ex
 
-    hass.data[DATA_KNX_CONFIG] = config
-    hass.data[DOMAIN] = knx_module
+    hass.data[KNX_MODULE_KEY] = knx_module
 
     if CONF_KNX_EXPOSE in config:
         for expose_config in config[CONF_KNX_EXPOSE]:
             knx_module.exposures.append(
                 create_knx_exposure(hass, knx_module.xknx, expose_config)
             )
+    configured_platforms_yaml = {
+        platform for platform in SUPPORTED_PLATFORMS_YAML if platform in config
+    }
     await hass.config_entries.async_forward_entry_setups(
         entry,
         {
             Platform.SENSOR,  # always forward sensor for system entities (telegram counter, etc.)
             *SUPPORTED_PLATFORMS_UI,  # forward all platforms that support UI entity management
-            *{  # forward yaml-only managed platforms on demand
-                platform for platform in SUPPORTED_PLATFORMS_YAML if platform in config
-            },
+            *configured_platforms_yaml,  # forward yaml-only managed platforms on demand,
         },
     )
 
@@ -210,30 +208,30 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
 
 async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Unloading the KNX platforms."""
-    #  if not loaded directly return
-    if not hass.data.get(DOMAIN):
+    knx_module = hass.data.get(KNX_MODULE_KEY)
+    if not knx_module:
+        #  if not loaded directly return
         return True
 
-    knx_module: KNXModule = hass.data[DOMAIN]
     for exposure in knx_module.exposures:
         exposure.async_remove()
 
+    configured_platforms_yaml = {
+        platform
+        for platform in SUPPORTED_PLATFORMS_YAML
+        if platform in knx_module.config_yaml
+    }
     unload_ok = await hass.config_entries.async_unload_platforms(
         entry,
         {
             Platform.SENSOR,  # always unload system entities (telegram counter, etc.)
             *SUPPORTED_PLATFORMS_UI,  # unload all platforms that support UI entity management
-            *{  # unload yaml-only managed platforms if configured
-                platform
-                for platform in SUPPORTED_PLATFORMS_YAML
-                if platform in hass.data[DATA_KNX_CONFIG]
-            },
+            *configured_platforms_yaml,  # unload yaml-only managed platforms if configured,
         },
     )
     if unload_ok:
         await knx_module.stop()
         hass.data.pop(DOMAIN)
-        hass.data.pop(DATA_KNX_CONFIG)
 
     return unload_ok
 
@@ -267,7 +265,7 @@ async def async_remove_config_entry_device(
     hass: HomeAssistant, config_entry: ConfigEntry, device_entry: DeviceEntry
 ) -> bool:
     """Remove a config entry from a device."""
-    knx_module: KNXModule = hass.data[DOMAIN]
+    knx_module = hass.data[KNX_MODULE_KEY]
     if not device_entry.identifiers.isdisjoint(
         knx_module.interface_device.device_info["identifiers"]
     ):
@@ -287,7 +285,7 @@ class KNXModule:
     ) -> None:
         """Initialize KNX module."""
         self.hass = hass
-        self.config = config
+        self.config_yaml = config
         self.connected = False
         self.exposures: list[KNXExposeSensor | KNXExposeTime] = []
         self.service_exposures: dict[str, KNXExposeSensor | KNXExposeTime] = {}
@@ -489,7 +487,7 @@ class KNXModule:
     def register_event_callback(self) -> TelegramQueue.Callback:
         """Register callback for knx_event within XKNX TelegramQueue."""
         address_filters = []
-        for filter_set in self.config[CONF_EVENT]:
+        for filter_set in self.config_yaml[CONF_EVENT]:
             _filters = list(map(AddressFilter, filter_set[KNX_ADDRESS]))
             address_filters.extend(_filters)
             if (dpt := filter_set.get(CONF_TYPE)) and (
diff --git a/homeassistant/components/knx/binary_sensor.py b/homeassistant/components/knx/binary_sensor.py
index 7d80ca55bf6..ad978dde30e 100644
--- a/homeassistant/components/knx/binary_sensor.py
+++ b/homeassistant/components/knx/binary_sensor.py
@@ -23,7 +23,7 @@ from homeassistant.helpers.restore_state import RestoreEntity
 from homeassistant.helpers.typing import ConfigType
 
 from . import KNXModule
-from .const import ATTR_COUNTER, ATTR_SOURCE, DATA_KNX_CONFIG, DOMAIN
+from .const import ATTR_COUNTER, ATTR_SOURCE, KNX_MODULE_KEY
 from .knx_entity import KnxYamlEntity
 from .schema import BinarySensorSchema
 
@@ -34,12 +34,11 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up the KNX binary sensor platform."""
-    knx_module: KNXModule = hass.data[DOMAIN]
-    config: ConfigType = hass.data[DATA_KNX_CONFIG]
+    knx_module = hass.data[KNX_MODULE_KEY]
+    config: list[ConfigType] = knx_module.config_yaml[Platform.BINARY_SENSOR]
 
     async_add_entities(
-        KNXBinarySensor(knx_module, entity_config)
-        for entity_config in config[Platform.BINARY_SENSOR]
+        KNXBinarySensor(knx_module, entity_config) for entity_config in config
     )
 
 
diff --git a/homeassistant/components/knx/button.py b/homeassistant/components/knx/button.py
index f6627fc527b..9a5700917f9 100644
--- a/homeassistant/components/knx/button.py
+++ b/homeassistant/components/knx/button.py
@@ -12,7 +12,7 @@ from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType
 
 from . import KNXModule
-from .const import CONF_PAYLOAD_LENGTH, DATA_KNX_CONFIG, DOMAIN, KNX_ADDRESS
+from .const import CONF_PAYLOAD_LENGTH, KNX_ADDRESS, KNX_MODULE_KEY
 from .knx_entity import KnxYamlEntity
 
 
@@ -22,13 +22,10 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up the KNX binary sensor platform."""
-    knx_module: KNXModule = hass.data[DOMAIN]
-    config: ConfigType = hass.data[DATA_KNX_CONFIG]
+    knx_module = hass.data[KNX_MODULE_KEY]
+    config: list[ConfigType] = knx_module.config_yaml[Platform.BUTTON]
 
-    async_add_entities(
-        KNXButton(knx_module, entity_config)
-        for entity_config in config[Platform.BUTTON]
-    )
+    async_add_entities(KNXButton(knx_module, entity_config) for entity_config in config)
 
 
 class KNXButton(KnxYamlEntity, ButtonEntity):
diff --git a/homeassistant/components/knx/climate.py b/homeassistant/components/knx/climate.py
index 4932df55087..05f6a80d2d4 100644
--- a/homeassistant/components/knx/climate.py
+++ b/homeassistant/components/knx/climate.py
@@ -31,7 +31,7 @@ from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType
 
 from . import KNXModule
-from .const import CONTROLLER_MODES, CURRENT_HVAC_ACTIONS, DATA_KNX_CONFIG, DOMAIN
+from .const import CONTROLLER_MODES, CURRENT_HVAC_ACTIONS, KNX_MODULE_KEY
 from .knx_entity import KnxYamlEntity
 from .schema import ClimateSchema
 
@@ -45,8 +45,8 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up climate(s) for KNX platform."""
-    knx_module: KNXModule = hass.data[DOMAIN]
-    config: list[ConfigType] = hass.data[DATA_KNX_CONFIG][Platform.CLIMATE]
+    knx_module = hass.data[KNX_MODULE_KEY]
+    config: list[ConfigType] = knx_module.config_yaml[Platform.CLIMATE]
 
     async_add_entities(
         KNXClimate(knx_module, entity_config) for entity_config in config
diff --git a/homeassistant/components/knx/config_flow.py b/homeassistant/components/knx/config_flow.py
index 7e4db1f889b..4a71c600824 100644
--- a/homeassistant/components/knx/config_flow.py
+++ b/homeassistant/components/knx/config_flow.py
@@ -58,6 +58,7 @@ from .const import (
     CONF_KNX_TUNNELING_TCP_SECURE,
     DEFAULT_ROUTING_IA,
     DOMAIN,
+    KNX_MODULE_KEY,
     TELEGRAM_LOG_DEFAULT,
     TELEGRAM_LOG_MAX,
     KNXConfigEntryData,
@@ -182,7 +183,9 @@ class KNXCommonFlow(ABC, ConfigEntryBaseFlow):
             CONF_KNX_ROUTING: CONF_KNX_ROUTING.capitalize(),
         }
 
-        if isinstance(self, OptionsFlow) and (knx_module := self.hass.data.get(DOMAIN)):
+        if isinstance(self, OptionsFlow) and (
+            knx_module := self.hass.data.get(KNX_MODULE_KEY)
+        ):
             xknx = knx_module.xknx
         else:
             xknx = XKNX()
diff --git a/homeassistant/components/knx/const.py b/homeassistant/components/knx/const.py
index 9ceb18385cb..a7aee794264 100644
--- a/homeassistant/components/knx/const.py
+++ b/homeassistant/components/knx/const.py
@@ -4,15 +4,20 @@ from __future__ import annotations
 
 from collections.abc import Awaitable, Callable
 from enum import Enum
-from typing import Final, TypedDict
+from typing import TYPE_CHECKING, Final, TypedDict
 
 from xknx.dpt.dpt_20 import HVACControllerMode
 from xknx.telegram import Telegram
 
 from homeassistant.components.climate import HVACAction, HVACMode
 from homeassistant.const import Platform
+from homeassistant.util.hass_dict import HassKey
+
+if TYPE_CHECKING:
+    from . import KNXModule
 
 DOMAIN: Final = "knx"
+KNX_MODULE_KEY: HassKey[KNXModule] = HassKey(DOMAIN)
 
 # Address is used for configuration and services by the same functions so the key has to match
 KNX_ADDRESS: Final = "address"
@@ -68,8 +73,6 @@ CONF_RESPOND_TO_READ: Final = "respond_to_read"
 CONF_STATE_ADDRESS: Final = "state_address"
 CONF_SYNC_STATE: Final = "sync_state"
 
-# yaml config merged with config entry data
-DATA_KNX_CONFIG: Final = "knx_config"
 # original hass yaml config
 DATA_HASS_CONFIG: Final = "knx_hass_config"
 
diff --git a/homeassistant/components/knx/cover.py b/homeassistant/components/knx/cover.py
index 408f746e094..c4b445ff87f 100644
--- a/homeassistant/components/knx/cover.py
+++ b/homeassistant/components/knx/cover.py
@@ -26,7 +26,7 @@ from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType
 
 from . import KNXModule
-from .const import DATA_KNX_CONFIG, DOMAIN
+from .const import KNX_MODULE_KEY
 from .knx_entity import KnxYamlEntity
 from .schema import CoverSchema
 
@@ -37,8 +37,8 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up cover(s) for KNX platform."""
-    knx_module: KNXModule = hass.data[DOMAIN]
-    config: list[ConfigType] = hass.data[DATA_KNX_CONFIG][Platform.COVER]
+    knx_module = hass.data[KNX_MODULE_KEY]
+    config: list[ConfigType] = knx_module.config_yaml[Platform.COVER]
 
     async_add_entities(KNXCover(knx_module, entity_config) for entity_config in config)
 
diff --git a/homeassistant/components/knx/date.py b/homeassistant/components/knx/date.py
index 9f04a4acd7e..d551d4e5b27 100644
--- a/homeassistant/components/knx/date.py
+++ b/homeassistant/components/knx/date.py
@@ -27,9 +27,8 @@ from .const import (
     CONF_RESPOND_TO_READ,
     CONF_STATE_ADDRESS,
     CONF_SYNC_STATE,
-    DATA_KNX_CONFIG,
-    DOMAIN,
     KNX_ADDRESS,
+    KNX_MODULE_KEY,
 )
 from .knx_entity import KnxYamlEntity
 
@@ -40,8 +39,8 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up entities for KNX platform."""
-    knx_module: KNXModule = hass.data[DOMAIN]
-    config: list[ConfigType] = hass.data[DATA_KNX_CONFIG][Platform.DATE]
+    knx_module = hass.data[KNX_MODULE_KEY]
+    config: list[ConfigType] = knx_module.config_yaml[Platform.DATE]
 
     async_add_entities(
         KNXDateEntity(knx_module, entity_config) for entity_config in config
diff --git a/homeassistant/components/knx/datetime.py b/homeassistant/components/knx/datetime.py
index 8f1a25e6e3c..0f98a7be217 100644
--- a/homeassistant/components/knx/datetime.py
+++ b/homeassistant/components/knx/datetime.py
@@ -28,9 +28,8 @@ from .const import (
     CONF_RESPOND_TO_READ,
     CONF_STATE_ADDRESS,
     CONF_SYNC_STATE,
-    DATA_KNX_CONFIG,
-    DOMAIN,
     KNX_ADDRESS,
+    KNX_MODULE_KEY,
 )
 from .knx_entity import KnxYamlEntity
 
@@ -41,8 +40,8 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up entities for KNX platform."""
-    knx_module: KNXModule = hass.data[DOMAIN]
-    config: list[ConfigType] = hass.data[DATA_KNX_CONFIG][Platform.DATETIME]
+    knx_module = hass.data[KNX_MODULE_KEY]
+    config: list[ConfigType] = knx_module.config_yaml[Platform.DATETIME]
 
     async_add_entities(
         KNXDateTimeEntity(knx_module, entity_config) for entity_config in config
diff --git a/homeassistant/components/knx/device_trigger.py b/homeassistant/components/knx/device_trigger.py
index ea3cc5faad4..96d8855f479 100644
--- a/homeassistant/components/knx/device_trigger.py
+++ b/homeassistant/components/knx/device_trigger.py
@@ -16,9 +16,8 @@ from homeassistant.helpers import selector
 from homeassistant.helpers.trigger import TriggerActionType, TriggerInfo
 from homeassistant.helpers.typing import ConfigType
 
-from . import KNXModule, trigger
-from .const import DOMAIN
-from .project import KNXProject
+from . import trigger
+from .const import DOMAIN, KNX_MODULE_KEY
 from .trigger import (
     CONF_KNX_DESTINATION,
     CONF_KNX_GROUP_VALUE_READ,
@@ -47,7 +46,7 @@ async def async_get_triggers(
     """List device triggers for KNX devices."""
     triggers = []
 
-    knx: KNXModule = hass.data[DOMAIN]
+    knx = hass.data[KNX_MODULE_KEY]
     if knx.interface_device.device.id == device_id:
         # Add trigger for KNX telegrams to interface device
         triggers.append(
@@ -67,7 +66,7 @@ async def async_get_trigger_capabilities(
     hass: HomeAssistant, config: ConfigType
 ) -> dict[str, vol.Schema]:
     """List trigger capabilities."""
-    project: KNXProject = hass.data[DOMAIN].project
+    project = hass.data[KNX_MODULE_KEY].project
     options = [
         selector.SelectOptionDict(value=ga.address, label=f"{ga.address} - {ga.name}")
         for ga in project.group_addresses.values()
diff --git a/homeassistant/components/knx/diagnostics.py b/homeassistant/components/knx/diagnostics.py
index 1907539fc61..974a6b3b448 100644
--- a/homeassistant/components/knx/diagnostics.py
+++ b/homeassistant/components/knx/diagnostics.py
@@ -18,6 +18,7 @@ from .const import (
     CONF_KNX_SECURE_DEVICE_AUTHENTICATION,
     CONF_KNX_SECURE_USER_PASSWORD,
     DOMAIN,
+    KNX_MODULE_KEY,
 )
 
 TO_REDACT = {
@@ -33,7 +34,7 @@ async def async_get_config_entry_diagnostics(
 ) -> dict[str, Any]:
     """Return diagnostics for a config entry."""
     diag: dict[str, Any] = {}
-    knx_module = hass.data[DOMAIN]
+    knx_module = hass.data[KNX_MODULE_KEY]
     diag["xknx"] = {
         "version": knx_module.xknx.version,
         "current_address": str(knx_module.xknx.current_address),
diff --git a/homeassistant/components/knx/fan.py b/homeassistant/components/knx/fan.py
index 6fd87be97d1..6a026be2edf 100644
--- a/homeassistant/components/knx/fan.py
+++ b/homeassistant/components/knx/fan.py
@@ -20,7 +20,7 @@ from homeassistant.util.percentage import (
 from homeassistant.util.scaling import int_states_in_range
 
 from . import KNXModule
-from .const import DATA_KNX_CONFIG, DOMAIN, KNX_ADDRESS
+from .const import KNX_ADDRESS, KNX_MODULE_KEY
 from .knx_entity import KnxYamlEntity
 from .schema import FanSchema
 
@@ -33,8 +33,8 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up fan(s) for KNX platform."""
-    knx_module: KNXModule = hass.data[DOMAIN]
-    config: list[ConfigType] = hass.data[DATA_KNX_CONFIG][Platform.FAN]
+    knx_module = hass.data[KNX_MODULE_KEY]
+    config: list[ConfigType] = knx_module.config_yaml[Platform.FAN]
 
     async_add_entities(KNXFan(knx_module, entity_config) for entity_config in config)
 
diff --git a/homeassistant/components/knx/light.py b/homeassistant/components/knx/light.py
index 0caa3f0a799..a9116f5c282 100644
--- a/homeassistant/components/knx/light.py
+++ b/homeassistant/components/knx/light.py
@@ -29,7 +29,7 @@ from homeassistant.helpers.typing import ConfigType
 import homeassistant.util.color as color_util
 
 from . import KNXModule
-from .const import CONF_SYNC_STATE, DATA_KNX_CONFIG, DOMAIN, KNX_ADDRESS, ColorTempModes
+from .const import CONF_SYNC_STATE, DOMAIN, KNX_ADDRESS, KNX_MODULE_KEY, ColorTempModes
 from .knx_entity import KnxUiEntity, KnxUiEntityPlatformController, KnxYamlEntity
 from .schema import LightSchema
 from .storage.const import (
@@ -65,7 +65,7 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up light(s) for KNX platform."""
-    knx_module: KNXModule = hass.data[DOMAIN]
+    knx_module = hass.data[KNX_MODULE_KEY]
     platform = async_get_current_platform()
     knx_module.config_store.add_platform(
         platform=Platform.LIGHT,
@@ -77,7 +77,7 @@ async def async_setup_entry(
     )
 
     entities: list[KnxYamlEntity | KnxUiEntity] = []
-    if yaml_platform_config := hass.data[DATA_KNX_CONFIG].get(Platform.LIGHT):
+    if yaml_platform_config := knx_module.config_yaml.get(Platform.LIGHT):
         entities.extend(
             KnxYamlLight(knx_module, entity_config)
             for entity_config in yaml_platform_config
diff --git a/homeassistant/components/knx/notify.py b/homeassistant/components/knx/notify.py
index 173ab3119a0..ec17cf941f5 100644
--- a/homeassistant/components/knx/notify.py
+++ b/homeassistant/components/knx/notify.py
@@ -19,7 +19,7 @@ from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 from . import KNXModule
-from .const import DATA_KNX_CONFIG, DOMAIN, KNX_ADDRESS
+from .const import DOMAIN, KNX_ADDRESS, KNX_MODULE_KEY
 from .knx_entity import KnxYamlEntity
 
 
@@ -32,8 +32,9 @@ async def async_get_service(
     if discovery_info is None:
         return None
 
-    if platform_config := hass.data[DATA_KNX_CONFIG].get(Platform.NOTIFY):
-        xknx: XKNX = hass.data[DOMAIN].xknx
+    knx_module = hass.data[KNX_MODULE_KEY]
+    if platform_config := knx_module.config_yaml.get(Platform.NOTIFY):
+        xknx: XKNX = hass.data[KNX_MODULE_KEY].xknx
 
         notification_devices = [
             _create_notification_instance(xknx, device_config)
@@ -87,8 +88,8 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up notify(s) for KNX platform."""
-    knx_module: KNXModule = hass.data[DOMAIN]
-    config: list[ConfigType] = hass.data[DATA_KNX_CONFIG][Platform.NOTIFY]
+    knx_module = hass.data[KNX_MODULE_KEY]
+    config: list[ConfigType] = knx_module.config_yaml[Platform.NOTIFY]
 
     async_add_entities(KNXNotify(knx_module, entity_config) for entity_config in config)
 
diff --git a/homeassistant/components/knx/number.py b/homeassistant/components/knx/number.py
index cbbe91aba54..1a6c33239c9 100644
--- a/homeassistant/components/knx/number.py
+++ b/homeassistant/components/knx/number.py
@@ -23,13 +23,7 @@ from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType
 
 from . import KNXModule
-from .const import (
-    CONF_RESPOND_TO_READ,
-    CONF_STATE_ADDRESS,
-    DATA_KNX_CONFIG,
-    DOMAIN,
-    KNX_ADDRESS,
-)
+from .const import CONF_RESPOND_TO_READ, CONF_STATE_ADDRESS, KNX_ADDRESS, KNX_MODULE_KEY
 from .knx_entity import KnxYamlEntity
 from .schema import NumberSchema
 
@@ -40,8 +34,8 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up number(s) for KNX platform."""
-    knx_module: KNXModule = hass.data[DOMAIN]
-    config: list[ConfigType] = hass.data[DATA_KNX_CONFIG][Platform.NUMBER]
+    knx_module = hass.data[KNX_MODULE_KEY]
+    config: list[ConfigType] = knx_module.config_yaml[Platform.NUMBER]
 
     async_add_entities(KNXNumber(knx_module, entity_config) for entity_config in config)
 
diff --git a/homeassistant/components/knx/scene.py b/homeassistant/components/knx/scene.py
index 2de832ae54a..0a0e68239ef 100644
--- a/homeassistant/components/knx/scene.py
+++ b/homeassistant/components/knx/scene.py
@@ -14,7 +14,7 @@ from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType
 
 from . import KNXModule
-from .const import DATA_KNX_CONFIG, DOMAIN, KNX_ADDRESS
+from .const import KNX_ADDRESS, KNX_MODULE_KEY
 from .knx_entity import KnxYamlEntity
 from .schema import SceneSchema
 
@@ -25,8 +25,8 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up scene(s) for KNX platform."""
-    knx_module: KNXModule = hass.data[DOMAIN]
-    config: list[ConfigType] = hass.data[DATA_KNX_CONFIG][Platform.SCENE]
+    knx_module = hass.data[KNX_MODULE_KEY]
+    config: list[ConfigType] = knx_module.config_yaml[Platform.SCENE]
 
     async_add_entities(KNXScene(knx_module, entity_config) for entity_config in config)
 
diff --git a/homeassistant/components/knx/select.py b/homeassistant/components/knx/select.py
index 6c73bf8d573..272db48f14e 100644
--- a/homeassistant/components/knx/select.py
+++ b/homeassistant/components/knx/select.py
@@ -26,9 +26,8 @@ from .const import (
     CONF_RESPOND_TO_READ,
     CONF_STATE_ADDRESS,
     CONF_SYNC_STATE,
-    DATA_KNX_CONFIG,
-    DOMAIN,
     KNX_ADDRESS,
+    KNX_MODULE_KEY,
 )
 from .knx_entity import KnxYamlEntity
 from .schema import SelectSchema
@@ -40,8 +39,8 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up select(s) for KNX platform."""
-    knx_module: KNXModule = hass.data[DOMAIN]
-    config: list[ConfigType] = hass.data[DATA_KNX_CONFIG][Platform.SELECT]
+    knx_module = hass.data[KNX_MODULE_KEY]
+    config: list[ConfigType] = knx_module.config_yaml[Platform.SELECT]
 
     async_add_entities(KNXSelect(knx_module, entity_config) for entity_config in config)
 
diff --git a/homeassistant/components/knx/sensor.py b/homeassistant/components/knx/sensor.py
index a28c1a339e6..03b3f3f70c3 100644
--- a/homeassistant/components/knx/sensor.py
+++ b/homeassistant/components/knx/sensor.py
@@ -34,7 +34,7 @@ from homeassistant.helpers.typing import ConfigType, StateType
 from homeassistant.util.enum import try_parse_enum
 
 from . import KNXModule
-from .const import ATTR_SOURCE, DATA_KNX_CONFIG, DOMAIN
+from .const import ATTR_SOURCE, KNX_MODULE_KEY
 from .knx_entity import KnxYamlEntity
 from .schema import SensorSchema
 
@@ -115,13 +115,13 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up sensor(s) for KNX platform."""
-    knx_module: KNXModule = hass.data[DOMAIN]
+    knx_module = hass.data[KNX_MODULE_KEY]
     entities: list[SensorEntity] = []
     entities.extend(
         KNXSystemSensor(knx_module, description)
         for description in SYSTEM_ENTITY_DESCRIPTIONS
     )
-    config: list[ConfigType] = hass.data[DATA_KNX_CONFIG].get(Platform.SENSOR)
+    config: list[ConfigType] | None = knx_module.config_yaml.get(Platform.SENSOR)
     if config:
         entities.extend(
             KNXSensor(knx_module, entity_config) for entity_config in config
diff --git a/homeassistant/components/knx/services.py b/homeassistant/components/knx/services.py
index 8b82671deaa..113be9709ee 100644
--- a/homeassistant/components/knx/services.py
+++ b/homeassistant/components/knx/services.py
@@ -22,6 +22,7 @@ from homeassistant.helpers.service import async_register_admin_service
 from .const import (
     DOMAIN,
     KNX_ADDRESS,
+    KNX_MODULE_KEY,
     SERVICE_KNX_ATTR_PAYLOAD,
     SERVICE_KNX_ATTR_REMOVE,
     SERVICE_KNX_ATTR_RESPONSE,
@@ -85,7 +86,7 @@ def register_knx_services(hass: HomeAssistant) -> None:
 def get_knx_module(hass: HomeAssistant) -> KNXModule:
     """Return KNXModule instance."""
     try:
-        return hass.data[DOMAIN]  # type: ignore[no-any-return]
+        return hass.data[KNX_MODULE_KEY]
     except KeyError as err:
         raise HomeAssistantError("KNX entry not loaded") from err
 
diff --git a/homeassistant/components/knx/switch.py b/homeassistant/components/knx/switch.py
index ebe930957d6..9146a98dda4 100644
--- a/homeassistant/components/knx/switch.py
+++ b/homeassistant/components/knx/switch.py
@@ -31,9 +31,9 @@ from .const import (
     CONF_INVERT,
     CONF_RESPOND_TO_READ,
     CONF_SYNC_STATE,
-    DATA_KNX_CONFIG,
     DOMAIN,
     KNX_ADDRESS,
+    KNX_MODULE_KEY,
 )
 from .knx_entity import KnxUiEntity, KnxUiEntityPlatformController, KnxYamlEntity
 from .schema import SwitchSchema
@@ -53,7 +53,7 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up switch(es) for KNX platform."""
-    knx_module: KNXModule = hass.data[DOMAIN]
+    knx_module = hass.data[KNX_MODULE_KEY]
     platform = async_get_current_platform()
     knx_module.config_store.add_platform(
         platform=Platform.SWITCH,
@@ -65,7 +65,7 @@ async def async_setup_entry(
     )
 
     entities: list[KnxYamlEntity | KnxUiEntity] = []
-    if yaml_platform_config := hass.data[DATA_KNX_CONFIG].get(Platform.SWITCH):
+    if yaml_platform_config := knx_module.config_yaml.get(Platform.SWITCH):
         entities.extend(
             KnxYamlSwitch(knx_module, entity_config)
             for entity_config in yaml_platform_config
diff --git a/homeassistant/components/knx/text.py b/homeassistant/components/knx/text.py
index 381cb95ad32..1fdfc21bf2b 100644
--- a/homeassistant/components/knx/text.py
+++ b/homeassistant/components/knx/text.py
@@ -23,13 +23,7 @@ from homeassistant.helpers.restore_state import RestoreEntity
 from homeassistant.helpers.typing import ConfigType
 
 from . import KNXModule
-from .const import (
-    CONF_RESPOND_TO_READ,
-    CONF_STATE_ADDRESS,
-    DATA_KNX_CONFIG,
-    DOMAIN,
-    KNX_ADDRESS,
-)
+from .const import CONF_RESPOND_TO_READ, CONF_STATE_ADDRESS, KNX_ADDRESS, KNX_MODULE_KEY
 from .knx_entity import KnxYamlEntity
 
 
@@ -39,8 +33,8 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up sensor(s) for KNX platform."""
-    knx_module: KNXModule = hass.data[DOMAIN]
-    config: list[ConfigType] = hass.data[DATA_KNX_CONFIG][Platform.TEXT]
+    knx_module = hass.data[KNX_MODULE_KEY]
+    config: list[ConfigType] = knx_module.config_yaml[Platform.TEXT]
 
     async_add_entities(KNXText(knx_module, entity_config) for entity_config in config)
 
diff --git a/homeassistant/components/knx/time.py b/homeassistant/components/knx/time.py
index b4e562a8869..8e57b4a4fb5 100644
--- a/homeassistant/components/knx/time.py
+++ b/homeassistant/components/knx/time.py
@@ -27,9 +27,8 @@ from .const import (
     CONF_RESPOND_TO_READ,
     CONF_STATE_ADDRESS,
     CONF_SYNC_STATE,
-    DATA_KNX_CONFIG,
-    DOMAIN,
     KNX_ADDRESS,
+    KNX_MODULE_KEY,
 )
 from .knx_entity import KnxYamlEntity
 
@@ -40,8 +39,8 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up entities for KNX platform."""
-    knx_module: KNXModule = hass.data[DOMAIN]
-    config: list[ConfigType] = hass.data[DATA_KNX_CONFIG][Platform.TIME]
+    knx_module = hass.data[KNX_MODULE_KEY]
+    config: list[ConfigType] = knx_module.config_yaml[Platform.TIME]
 
     async_add_entities(
         KNXTimeEntity(knx_module, entity_config) for entity_config in config
diff --git a/homeassistant/components/knx/weather.py b/homeassistant/components/knx/weather.py
index 99f4be962fe..3cf8f163330 100644
--- a/homeassistant/components/knx/weather.py
+++ b/homeassistant/components/knx/weather.py
@@ -20,7 +20,7 @@ from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType
 
 from . import KNXModule
-from .const import DATA_KNX_CONFIG, DOMAIN
+from .const import KNX_MODULE_KEY
 from .knx_entity import KnxYamlEntity
 from .schema import WeatherSchema
 
@@ -31,8 +31,8 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up switch(es) for KNX platform."""
-    knx_module: KNXModule = hass.data[DOMAIN]
-    config: list[ConfigType] = hass.data[DATA_KNX_CONFIG][Platform.WEATHER]
+    knx_module = hass.data[KNX_MODULE_KEY]
+    config: list[ConfigType] = knx_module.config_yaml[Platform.WEATHER]
 
     async_add_entities(
         KNXWeather(knx_module, entity_config) for entity_config in config
diff --git a/homeassistant/components/knx/websocket.py b/homeassistant/components/knx/websocket.py
index 5c21a941484..6cb2218b221 100644
--- a/homeassistant/components/knx/websocket.py
+++ b/homeassistant/components/knx/websocket.py
@@ -21,7 +21,7 @@ from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.typing import UNDEFINED
 from homeassistant.util.ulid import ulid_now
 
-from .const import DOMAIN
+from .const import DOMAIN, KNX_MODULE_KEY
 from .storage.config_store import ConfigStoreException
 from .storage.const import CONF_DATA
 from .storage.entity_store_schema import (
@@ -38,7 +38,6 @@ from .telegrams import SIGNAL_KNX_TELEGRAM, TelegramDict
 if TYPE_CHECKING:
     from . import KNXModule
 
-
 URL_BASE: Final = "/knx_static"
 
 
@@ -126,7 +125,7 @@ def provide_knx(
         ) -> None:
             """Add KNX Module to call function."""
             try:
-                knx: KNXModule = hass.data[DOMAIN]
+                knx = hass.data[KNX_MODULE_KEY]
             except KeyError:
                 _send_not_loaded_error(connection, msg["id"])
                 return
@@ -142,7 +141,7 @@ def provide_knx(
         ) -> None:
             """Add KNX Module to call function."""
             try:
-                knx: KNXModule = hass.data[DOMAIN]
+                knx = hass.data[KNX_MODULE_KEY]
             except KeyError:
                 _send_not_loaded_error(connection, msg["id"])
                 return
diff --git a/tests/components/knx/test_button.py b/tests/components/knx/test_button.py
index a05752eced1..38ccb36200b 100644
--- a/tests/components/knx/test_button.py
+++ b/tests/components/knx/test_button.py
@@ -6,7 +6,11 @@ import logging
 from freezegun.api import FrozenDateTimeFactory
 import pytest
 
-from homeassistant.components.knx.const import CONF_PAYLOAD_LENGTH, DOMAIN, KNX_ADDRESS
+from homeassistant.components.knx.const import (
+    CONF_PAYLOAD_LENGTH,
+    KNX_ADDRESS,
+    KNX_MODULE_KEY,
+)
 from homeassistant.components.knx.schema import ButtonSchema
 from homeassistant.const import CONF_NAME, CONF_PAYLOAD, CONF_TYPE
 from homeassistant.core import HomeAssistant
@@ -134,4 +138,4 @@ async def test_button_invalid(
         assert record.levelname == "ERROR"
         assert "Setup failed for 'knx': Invalid config." in record.message
     assert hass.states.get("button.test") is None
-    assert hass.data.get(DOMAIN) is None
+    assert hass.data.get(KNX_MODULE_KEY) is None
diff --git a/tests/components/knx/test_telegrams.py b/tests/components/knx/test_telegrams.py
index 69e3208879c..883e8ccbb2d 100644
--- a/tests/components/knx/test_telegrams.py
+++ b/tests/components/knx/test_telegrams.py
@@ -6,8 +6,10 @@ from typing import Any
 
 import pytest
 
-from homeassistant.components.knx import DOMAIN
-from homeassistant.components.knx.const import CONF_KNX_TELEGRAM_LOG_SIZE
+from homeassistant.components.knx.const import (
+    CONF_KNX_TELEGRAM_LOG_SIZE,
+    KNX_MODULE_KEY,
+)
 from homeassistant.components.knx.telegrams import TelegramDict
 from homeassistant.core import HomeAssistant
 
@@ -76,7 +78,7 @@ async def test_store_telegam_history(
     )
     await knx.assert_write("2/2/2", (1, 2, 3, 4))
 
-    assert len(hass.data[DOMAIN].telegrams.recent_telegrams) == 2
+    assert len(hass.data[KNX_MODULE_KEY].telegrams.recent_telegrams) == 2
     with pytest.raises(KeyError):
         hass_storage["knx/telegrams_history.json"]
 
@@ -93,7 +95,7 @@ async def test_load_telegam_history(
     """Test telegram history restoration."""
     hass_storage["knx/telegrams_history.json"] = {"version": 1, "data": MOCK_TELEGRAMS}
     await knx.setup_integration({})
-    loaded_telegrams = hass.data[DOMAIN].telegrams.recent_telegrams
+    loaded_telegrams = hass.data[KNX_MODULE_KEY].telegrams.recent_telegrams
     assert assert_telegram_history(loaded_telegrams)
     # TelegramDict "payload" is a tuple, this shall be restored when loading from JSON
     assert isinstance(loaded_telegrams[1]["payload"], tuple)
@@ -114,4 +116,4 @@ async def test_remove_telegam_history(
     await knx.setup_integration({}, add_entry_to_hass=False)
     # Store.async_remove() is mocked by hass_storage - check that data was removed.
     assert "knx/telegrams_history.json" not in hass_storage
-    assert not hass.data[DOMAIN].telegrams.recent_telegrams
+    assert not hass.data[KNX_MODULE_KEY].telegrams.recent_telegrams
diff --git a/tests/components/knx/test_websocket.py b/tests/components/knx/test_websocket.py
index e747b0daade..b3e4b7aaa38 100644
--- a/tests/components/knx/test_websocket.py
+++ b/tests/components/knx/test_websocket.py
@@ -5,8 +5,9 @@ from unittest.mock import patch
 
 import pytest
 
-from homeassistant.components.knx import DOMAIN, KNX_ADDRESS, SwitchSchema
+from homeassistant.components.knx.const import KNX_ADDRESS, KNX_MODULE_KEY
 from homeassistant.components.knx.project import STORAGE_KEY as KNX_PROJECT_STORAGE_KEY
+from homeassistant.components.knx.schema import SwitchSchema
 from homeassistant.const import CONF_NAME
 from homeassistant.core import HomeAssistant
 
@@ -66,7 +67,7 @@ async def test_knx_project_file_process(
 
     await knx.setup_integration({})
     client = await hass_ws_client(hass)
-    assert not hass.data[DOMAIN].project.loaded
+    assert not hass.data[KNX_MODULE_KEY].project.loaded
 
     await client.send_json(
         {
@@ -89,7 +90,7 @@ async def test_knx_project_file_process(
         parse_mock.assert_called_once_with()
 
     assert res["success"], res
-    assert hass.data[DOMAIN].project.loaded
+    assert hass.data[KNX_MODULE_KEY].project.loaded
     assert hass_storage[KNX_PROJECT_STORAGE_KEY]["data"] == _parse_result
 
 
@@ -101,7 +102,7 @@ async def test_knx_project_file_process_error(
     """Test knx/project_file_process exception handling."""
     await knx.setup_integration({})
     client = await hass_ws_client(hass)
-    assert not hass.data[DOMAIN].project.loaded
+    assert not hass.data[KNX_MODULE_KEY].project.loaded
 
     await client.send_json(
         {
@@ -122,7 +123,7 @@ async def test_knx_project_file_process_error(
         parse_mock.assert_called_once_with()
 
     assert res["error"], res
-    assert not hass.data[DOMAIN].project.loaded
+    assert not hass.data[KNX_MODULE_KEY].project.loaded
 
 
 async def test_knx_project_file_remove(
@@ -136,13 +137,13 @@ async def test_knx_project_file_remove(
     await knx.setup_integration({})
     assert hass_storage[KNX_PROJECT_STORAGE_KEY]
     client = await hass_ws_client(hass)
-    assert hass.data[DOMAIN].project.loaded
+    assert hass.data[KNX_MODULE_KEY].project.loaded
 
     await client.send_json({"id": 6, "type": "knx/project_file_remove"})
     res = await client.receive_json()
 
     assert res["success"], res
-    assert not hass.data[DOMAIN].project.loaded
+    assert not hass.data[KNX_MODULE_KEY].project.loaded
     assert not hass_storage.get(KNX_PROJECT_STORAGE_KEY)
 
 
@@ -155,7 +156,7 @@ async def test_knx_get_project(
     """Test retrieval of kxnproject from store."""
     await knx.setup_integration({})
     client = await hass_ws_client(hass)
-    assert hass.data[DOMAIN].project.loaded
+    assert hass.data[KNX_MODULE_KEY].project.loaded
 
     await client.send_json({"id": 3, "type": "knx/get_knx_project"})
     res = await client.receive_json()