diff --git a/homeassistant/components/demo/cover.py b/homeassistant/components/demo/cover.py
index b4ca5541690..dab85964639 100644
--- a/homeassistant/components/demo/cover.py
+++ b/homeassistant/components/demo/cover.py
@@ -13,14 +13,22 @@ from homeassistant.components.cover import (
     CoverDeviceClass,
     CoverEntity,
 )
-from homeassistant.core import callback
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.entity import DeviceInfo
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.event import async_track_utc_time_change
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 from . import DOMAIN
 
 
-async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
+async def async_setup_platform(
+    hass: HomeAssistant,
+    config: ConfigType,
+    async_add_entities: AddEntitiesCallback,
+    discovery_info: DiscoveryInfoType | None = None,
+) -> None:
     """Set up the Demo covers."""
     async_add_entities(
         [
@@ -50,7 +58,11 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
     )
 
 
-async def async_setup_entry(hass, config_entry, async_add_entities):
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
     """Set up the Demo config entry."""
     await async_setup_platform(hass, {}, async_add_entities)
 
diff --git a/homeassistant/components/demo/humidifier.py b/homeassistant/components/demo/humidifier.py
index 9065c5971fb..0b366e90efe 100644
--- a/homeassistant/components/demo/humidifier.py
+++ b/homeassistant/components/demo/humidifier.py
@@ -3,11 +3,20 @@ from __future__ import annotations
 
 from homeassistant.components.humidifier import HumidifierDeviceClass, HumidifierEntity
 from homeassistant.components.humidifier.const import SUPPORT_MODES
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 SUPPORT_FLAGS = 0
 
 
-async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
+async def async_setup_platform(
+    hass: HomeAssistant,
+    config: ConfigType,
+    async_add_entities: AddEntitiesCallback,
+    discovery_info: DiscoveryInfoType | None = None,
+) -> None:
     """Set up the Demo humidifier devices."""
     async_add_entities(
         [
@@ -33,7 +42,11 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
     )
 
 
-async def async_setup_entry(hass, config_entry, async_add_entities):
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
     """Set up the Demo humidifier devices config entry."""
     await async_setup_platform(hass, {}, async_add_entities)
 
diff --git a/homeassistant/components/demo/image_processing.py b/homeassistant/components/demo/image_processing.py
index 9183609509e..070d8dcfa9c 100644
--- a/homeassistant/components/demo/image_processing.py
+++ b/homeassistant/components/demo/image_processing.py
@@ -1,4 +1,6 @@
 """Support for the demo image processing."""
+from __future__ import annotations
+
 from homeassistant.components.image_processing import (
     ATTR_AGE,
     ATTR_CONFIDENCE,
@@ -9,9 +11,17 @@ from homeassistant.components.image_processing import (
 from homeassistant.components.openalpr_local.image_processing import (
     ImageProcessingAlprEntity,
 )
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 
-def setup_platform(hass, config, add_entities, discovery_info=None):
+def setup_platform(
+    hass: HomeAssistant,
+    config: ConfigType,
+    add_entities: AddEntitiesCallback,
+    discovery_info: DiscoveryInfoType | None = None,
+) -> None:
     """Set up the demo image processing platform."""
     add_entities(
         [
diff --git a/homeassistant/components/demo/light.py b/homeassistant/components/demo/light.py
index d14f7ffba0e..13e15eb274e 100644
--- a/homeassistant/components/demo/light.py
+++ b/homeassistant/components/demo/light.py
@@ -19,7 +19,11 @@ from homeassistant.components.light import (
     SUPPORT_EFFECT,
     LightEntity,
 )
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity import DeviceInfo
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 from . import DOMAIN
 
@@ -33,7 +37,12 @@ SUPPORT_DEMO = {COLOR_MODE_HS, COLOR_MODE_COLOR_TEMP}
 SUPPORT_DEMO_HS_WHITE = {COLOR_MODE_HS, COLOR_MODE_WHITE}
 
 
-async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
+async def async_setup_platform(
+    hass: HomeAssistant,
+    config: ConfigType,
+    async_add_entities: AddEntitiesCallback,
+    discovery_info: DiscoveryInfoType | None = None,
+) -> None:
     """Set up the demo light platform."""
     async_add_entities(
         [
@@ -88,7 +97,11 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
     )
 
 
-async def async_setup_entry(hass, config_entry, async_add_entities):
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
     """Set up the Demo config entry."""
     await async_setup_platform(hass, {}, async_add_entities)
 
diff --git a/homeassistant/components/demo/lock.py b/homeassistant/components/demo/lock.py
index c46e9f5eebe..c44d10ed8f1 100644
--- a/homeassistant/components/demo/lock.py
+++ b/homeassistant/components/demo/lock.py
@@ -1,7 +1,10 @@
 """Demo lock platform that has two fake locks."""
+from __future__ import annotations
+
 import asyncio
 
 from homeassistant.components.lock import SUPPORT_OPEN, LockEntity
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import (
     STATE_JAMMED,
     STATE_LOCKED,
@@ -9,11 +12,19 @@ from homeassistant.const import (
     STATE_UNLOCKED,
     STATE_UNLOCKING,
 )
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 LOCK_UNLOCK_DELAY = 2  # Used to give a realistic lock/unlock experience in frontend
 
 
-async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
+async def async_setup_platform(
+    hass: HomeAssistant,
+    config: ConfigType,
+    async_add_entities: AddEntitiesCallback,
+    discovery_info: DiscoveryInfoType | None = None,
+) -> None:
     """Set up the Demo lock platform."""
     async_add_entities(
         [
@@ -25,7 +36,11 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
     )
 
 
-async def async_setup_entry(hass, config_entry, async_add_entities):
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
     """Set up the Demo config entry."""
     await async_setup_platform(hass, {}, async_add_entities)
 
diff --git a/homeassistant/components/demo/media_player.py b/homeassistant/components/demo/media_player.py
index cc02ecba175..317babfe74c 100644
--- a/homeassistant/components/demo/media_player.py
+++ b/homeassistant/components/demo/media_player.py
@@ -1,4 +1,6 @@
 """Demo implementation of the media player."""
+from __future__ import annotations
+
 from homeassistant.components.media_player import MediaPlayerEntity
 from homeassistant.components.media_player.const import (
     MEDIA_TYPE_MOVIE,
@@ -24,11 +26,20 @@ from homeassistant.components.media_player.const import (
     SUPPORT_VOLUME_SET,
     SUPPORT_VOLUME_STEP,
 )
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import STATE_OFF, STATE_PAUSED, STATE_PLAYING
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 import homeassistant.util.dt as dt_util
 
 
-async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
+async def async_setup_platform(
+    hass: HomeAssistant,
+    config: ConfigType,
+    async_add_entities: AddEntitiesCallback,
+    discovery_info: DiscoveryInfoType | None = None,
+) -> None:
     """Set up the media player demo platform."""
     async_add_entities(
         [
@@ -48,7 +59,11 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
     )
 
 
-async def async_setup_entry(hass, config_entry, async_add_entities):
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
     """Set up the Demo config entry."""
     await async_setup_platform(hass, {}, async_add_entities)
 
diff --git a/homeassistant/components/demo/number.py b/homeassistant/components/demo/number.py
index 2625d8bca05..dd22c5f9827 100644
--- a/homeassistant/components/demo/number.py
+++ b/homeassistant/components/demo/number.py
@@ -2,13 +2,22 @@
 from __future__ import annotations
 
 from homeassistant.components.number import NumberEntity, NumberMode
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import DEVICE_DEFAULT_NAME
+from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity import DeviceInfo
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 from . import DOMAIN
 
 
-async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
+async def async_setup_platform(
+    hass: HomeAssistant,
+    config: ConfigType,
+    async_add_entities: AddEntitiesCallback,
+    discovery_info: DiscoveryInfoType | None = None,
+) -> None:
     """Set up the demo Number entity."""
     async_add_entities(
         [
@@ -55,7 +64,11 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
     )
 
 
-async def async_setup_entry(hass, config_entry, async_add_entities):
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
     """Set up the Demo config entry."""
     await async_setup_platform(hass, {}, async_add_entities)
 
diff --git a/homeassistant/components/demo/switch.py b/homeassistant/components/demo/switch.py
index 09389f7c8cd..c61e39d085b 100644
--- a/homeassistant/components/demo/switch.py
+++ b/homeassistant/components/demo/switch.py
@@ -2,13 +2,22 @@
 from __future__ import annotations
 
 from homeassistant.components.switch import SwitchDeviceClass, SwitchEntity
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import DEVICE_DEFAULT_NAME
+from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity import DeviceInfo
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 from . import DOMAIN
 
 
-async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
+async def async_setup_platform(
+    hass: HomeAssistant,
+    config: ConfigType,
+    async_add_entities: AddEntitiesCallback,
+    discovery_info: DiscoveryInfoType | None = None,
+) -> None:
     """Set up the demo switches."""
     async_add_entities(
         [
@@ -25,7 +34,11 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
     )
 
 
-async def async_setup_entry(hass, config_entry, async_add_entities):
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
     """Set up the Demo config entry."""
     await async_setup_platform(hass, {}, async_add_entities)
 
diff --git a/homeassistant/components/demo/vacuum.py b/homeassistant/components/demo/vacuum.py
index a5cffed1be8..bb390111285 100644
--- a/homeassistant/components/demo/vacuum.py
+++ b/homeassistant/components/demo/vacuum.py
@@ -1,4 +1,6 @@
 """Demo platform for the vacuum component."""
+from __future__ import annotations
+
 from homeassistant.components.vacuum import (
     ATTR_CLEANED_AREA,
     STATE_CLEANING,
@@ -22,7 +24,11 @@ from homeassistant.components.vacuum import (
     StateVacuumEntity,
     VacuumEntity,
 )
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant
 from homeassistant.helpers import event
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 SUPPORT_MINIMAL_SERVICES = SUPPORT_TURN_ON | SUPPORT_TURN_OFF
 
@@ -73,12 +79,21 @@ DEMO_VACUUM_NONE = "4_Fourth_floor"
 DEMO_VACUUM_STATE = "5_Fifth_floor"
 
 
-async def async_setup_entry(hass, config_entry, async_add_entities):
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
     """Set up the Demo config entry."""
     await async_setup_platform(hass, {}, async_add_entities)
 
 
-async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
+async def async_setup_platform(
+    hass: HomeAssistant,
+    config: ConfigType,
+    async_add_entities: AddEntitiesCallback,
+    discovery_info: DiscoveryInfoType | None = None,
+) -> None:
     """Set up the Demo vacuums."""
     async_add_entities(
         [
diff --git a/homeassistant/components/demo/water_heater.py b/homeassistant/components/demo/water_heater.py
index 2311f0f457b..7b3ecece88c 100644
--- a/homeassistant/components/demo/water_heater.py
+++ b/homeassistant/components/demo/water_heater.py
@@ -1,18 +1,29 @@
 """Demo platform that offers a fake water heater device."""
+from __future__ import annotations
+
 from homeassistant.components.water_heater import (
     SUPPORT_AWAY_MODE,
     SUPPORT_OPERATION_MODE,
     SUPPORT_TARGET_TEMPERATURE,
     WaterHeaterEntity,
 )
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import ATTR_TEMPERATURE, TEMP_CELSIUS, TEMP_FAHRENHEIT
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 SUPPORT_FLAGS_HEATER = (
     SUPPORT_TARGET_TEMPERATURE | SUPPORT_OPERATION_MODE | SUPPORT_AWAY_MODE
 )
 
 
-async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
+async def async_setup_platform(
+    hass: HomeAssistant,
+    config: ConfigType,
+    async_add_entities: AddEntitiesCallback,
+    discovery_info: DiscoveryInfoType | None = None,
+) -> None:
     """Set up the Demo water_heater devices."""
     async_add_entities(
         [
@@ -22,7 +33,11 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
     )
 
 
-async def async_setup_entry(hass, config_entry, async_add_entities):
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
     """Set up the Demo config entry."""
     await async_setup_platform(hass, {}, async_add_entities)
 
diff --git a/homeassistant/components/demo/weather.py b/homeassistant/components/demo/weather.py
index 9792a45bbdf..916083c5ad1 100644
--- a/homeassistant/components/demo/weather.py
+++ b/homeassistant/components/demo/weather.py
@@ -1,4 +1,6 @@
 """Demo platform that offers fake meteorological data."""
+from __future__ import annotations
+
 from datetime import timedelta
 
 from homeassistant.components.weather import (
@@ -24,7 +26,11 @@ from homeassistant.components.weather import (
     ATTR_FORECAST_TIME,
     WeatherEntity,
 )
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import TEMP_CELSIUS, TEMP_FAHRENHEIT
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 import homeassistant.util.dt as dt_util
 
 CONDITION_CLASSES = {
@@ -45,12 +51,21 @@ CONDITION_CLASSES = {
 }
 
 
-async def async_setup_entry(hass, config_entry, async_add_entities):
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
     """Set up the Demo config entry."""
     setup_platform(hass, {}, async_add_entities)
 
 
-def setup_platform(hass, config, add_entities, discovery_info=None):
+def setup_platform(
+    hass: HomeAssistant,
+    config: ConfigType,
+    add_entities: AddEntitiesCallback,
+    discovery_info: DiscoveryInfoType | None = None,
+) -> None:
     """Set up the Demo weather."""
     add_entities(
         [