diff --git a/homeassistant/components/tado/__init__.py b/homeassistant/components/tado/__init__.py
index 8bb9b72f1174d..6858f49799a03 100644
--- a/homeassistant/components/tado/__init__.py
+++ b/homeassistant/components/tado/__init__.py
@@ -9,7 +9,7 @@
 
 from homeassistant.components.climate.const import PRESET_AWAY, PRESET_HOME
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_PASSWORD, CONF_USERNAME
+from homeassistant.const import CONF_PASSWORD, CONF_USERNAME, Platform
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.exceptions import ConfigEntryNotReady
 from homeassistant.helpers import config_validation as cv
@@ -31,7 +31,12 @@
 _LOGGER = logging.getLogger(__name__)
 
 
-PLATFORMS = ["binary_sensor", "sensor", "climate", "water_heater"]
+PLATFORMS = [
+    Platform.BINARY_SENSOR,
+    Platform.CLIMATE,
+    Platform.SENSOR,
+    Platform.WATER_HEATER,
+]
 
 MIN_TIME_BETWEEN_UPDATES = timedelta(minutes=4)
 SCAN_INTERVAL = timedelta(minutes=5)
diff --git a/homeassistant/components/tailscale/__init__.py b/homeassistant/components/tailscale/__init__.py
index 72a0ef49fc06e..b23eea7a06c4d 100644
--- a/homeassistant/components/tailscale/__init__.py
+++ b/homeassistant/components/tailscale/__init__.py
@@ -3,9 +3,8 @@
 
 from tailscale import Device as TailscaleDevice
 
-from homeassistant.components.binary_sensor import DOMAIN as BINARY_SENSOR_DOMAIN
-from homeassistant.components.sensor import DOMAIN as SENSOR_DOMAIN
 from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.device_registry import DeviceEntryType
 from homeassistant.helpers.entity import DeviceInfo, EntityDescription
@@ -17,7 +16,7 @@
 from .const import DOMAIN
 from .coordinator import TailscaleDataUpdateCoordinator
 
-PLATFORMS = (BINARY_SENSOR_DOMAIN, SENSOR_DOMAIN)
+PLATFORMS = [Platform.BINARY_SENSOR, Platform.SENSOR]
 
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
diff --git a/homeassistant/components/tesla_wall_connector/__init__.py b/homeassistant/components/tesla_wall_connector/__init__.py
index 78ae232d49345..742b0a34b177d 100644
--- a/homeassistant/components/tesla_wall_connector/__init__.py
+++ b/homeassistant/components/tesla_wall_connector/__init__.py
@@ -15,7 +15,7 @@
 )
 
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_HOST, CONF_SCAN_INTERVAL
+from homeassistant.const import CONF_HOST, CONF_SCAN_INTERVAL, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryNotReady
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
@@ -34,7 +34,7 @@
     WALLCONNECTOR_DEVICE_NAME,
 )
 
-PLATFORMS: list[str] = ["binary_sensor", "sensor"]
+PLATFORMS: list[Platform] = [Platform.BINARY_SENSOR, Platform.SENSOR]
 
 _LOGGER = logging.getLogger(__name__)
 
diff --git a/homeassistant/components/tibber/__init__.py b/homeassistant/components/tibber/__init__.py
index da94df55c885a..3b71a40b0932b 100644
--- a/homeassistant/components/tibber/__init__.py
+++ b/homeassistant/components/tibber/__init__.py
@@ -5,7 +5,12 @@
 import aiohttp
 import tibber
 
-from homeassistant.const import CONF_ACCESS_TOKEN, CONF_NAME, EVENT_HOMEASSISTANT_STOP
+from homeassistant.const import (
+    CONF_ACCESS_TOKEN,
+    CONF_NAME,
+    EVENT_HOMEASSISTANT_STOP,
+    Platform,
+)
 from homeassistant.exceptions import ConfigEntryNotReady
 from homeassistant.helpers import discovery
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
@@ -14,9 +19,7 @@
 
 from .const import DATA_HASS_CONFIG, DOMAIN
 
-PLATFORMS = [
-    "sensor",
-]
+PLATFORMS = [Platform.SENSOR]
 
 CONFIG_SCHEMA = cv.deprecated(DOMAIN)
 
diff --git a/homeassistant/components/tile/__init__.py b/homeassistant/components/tile/__init__.py
index 75bf306a98b82..388ffbff7fd7c 100644
--- a/homeassistant/components/tile/__init__.py
+++ b/homeassistant/components/tile/__init__.py
@@ -9,7 +9,7 @@
 from pytile.tile import Tile
 
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_PASSWORD, CONF_USERNAME
+from homeassistant.const import CONF_PASSWORD, CONF_USERNAME, Platform
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.exceptions import ConfigEntryNotReady
 from homeassistant.helpers import aiohttp_client
@@ -19,7 +19,7 @@
 
 from .const import DATA_COORDINATOR, DATA_TILE, DOMAIN, LOGGER
 
-PLATFORMS = ["device_tracker"]
+PLATFORMS = [Platform.DEVICE_TRACKER]
 DEVICE_TYPES = ["PHONE", "TILE"]
 
 DEFAULT_INIT_TASK_LIMIT = 2
diff --git a/homeassistant/components/tolo/__init__.py b/homeassistant/components/tolo/__init__.py
index 4f41303c8f859..6e95089ccbea2 100644
--- a/homeassistant/components/tolo/__init__.py
+++ b/homeassistant/components/tolo/__init__.py
@@ -11,7 +11,7 @@
 from tololib.message_info import SettingsInfo, StatusInfo
 
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_HOST
+from homeassistant.const import CONF_HOST, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity import DeviceInfo
 from homeassistant.helpers.update_coordinator import (
@@ -23,13 +23,13 @@
 from .const import DEFAULT_RETRY_COUNT, DEFAULT_RETRY_TIMEOUT, DOMAIN
 
 PLATFORMS = [
-    "binary_sensor",
-    "button",
-    "climate",
-    "fan",
-    "light",
-    "select",
-    "sensor",
+    Platform.BINARY_SENSOR,
+    Platform.BUTTON,
+    Platform.CLIMATE,
+    Platform.FAN,
+    Platform.LIGHT,
+    Platform.SELECT,
+    Platform.SENSOR,
 ]
 
 _LOGGER = logging.getLogger(__name__)
diff --git a/homeassistant/components/toon/__init__.py b/homeassistant/components/toon/__init__.py
index 372eeb47096b6..7d442130130ca 100644
--- a/homeassistant/components/toon/__init__.py
+++ b/homeassistant/components/toon/__init__.py
@@ -2,16 +2,13 @@
 
 import voluptuous as vol
 
-from homeassistant.components.binary_sensor import DOMAIN as BINARY_SENSOR_DOMAIN
-from homeassistant.components.climate import DOMAIN as CLIMATE_DOMAIN
-from homeassistant.components.sensor import DOMAIN as SENSOR_DOMAIN
-from homeassistant.components.switch import DOMAIN as SWITCH_DOMAIN
 from homeassistant.config_entries import SOURCE_IMPORT, ConfigEntry
 from homeassistant.const import (
     CONF_CLIENT_ID,
     CONF_CLIENT_SECRET,
     CONF_SCAN_INTERVAL,
     EVENT_HOMEASSISTANT_STARTED,
+    Platform,
 )
 from homeassistant.core import CoreState, HomeAssistant
 from homeassistant.helpers import config_validation as cv, device_registry as dr
@@ -25,12 +22,12 @@
 from .coordinator import ToonDataUpdateCoordinator
 from .oauth2 import register_oauth2_implementations
 
-PLATFORMS = {
-    BINARY_SENSOR_DOMAIN,
-    CLIMATE_DOMAIN,
-    SENSOR_DOMAIN,
-    SWITCH_DOMAIN,
-}
+PLATFORMS = [
+    Platform.BINARY_SENSOR,
+    Platform.CLIMATE,
+    Platform.SENSOR,
+    Platform.SWITCH,
+]
 
 # Validation of the user's configuration
 CONFIG_SCHEMA = vol.Schema(
diff --git a/homeassistant/components/totalconnect/__init__.py b/homeassistant/components/totalconnect/__init__.py
index dcbc1592814fe..679f7afc3d3cc 100644
--- a/homeassistant/components/totalconnect/__init__.py
+++ b/homeassistant/components/totalconnect/__init__.py
@@ -7,7 +7,7 @@
 from total_connect_client.exceptions import AuthenticationError, TotalConnectError
 
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_PASSWORD, CONF_USERNAME
+from homeassistant.const import CONF_PASSWORD, CONF_USERNAME, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryAuthFailed
 import homeassistant.helpers.config_validation as cv
@@ -15,7 +15,7 @@
 
 from .const import CONF_USERCODES, DOMAIN
 
-PLATFORMS = ["alarm_control_panel", "binary_sensor"]
+PLATFORMS = [Platform.ALARM_CONTROL_PANEL, Platform.BINARY_SENSOR]
 
 CONFIG_SCHEMA = cv.deprecated(DOMAIN)
 SCAN_INTERVAL = timedelta(seconds=30)
diff --git a/homeassistant/components/tplink/const.py b/homeassistant/components/tplink/const.py
index 6d4fcbea75dfa..b1cd323a36a6f 100644
--- a/homeassistant/components/tplink/const.py
+++ b/homeassistant/components/tplink/const.py
@@ -3,6 +3,8 @@
 
 from typing import Final
 
+from homeassistant.const import Platform
+
 DOMAIN = "tplink"
 
 ATTR_CURRENT_A: Final = "current_a"
@@ -17,4 +19,4 @@
 CONF_SWITCH: Final = "switch"
 CONF_SENSOR: Final = "sensor"
 
-PLATFORMS: Final = [CONF_LIGHT, CONF_SENSOR, CONF_SWITCH]
+PLATFORMS: Final = [Platform.LIGHT, Platform.SENSOR, Platform.SWITCH]
diff --git a/homeassistant/components/traccar/__init__.py b/homeassistant/components/traccar/__init__.py
index e2605cdfd5458..1d656d75c4789 100644
--- a/homeassistant/components/traccar/__init__.py
+++ b/homeassistant/components/traccar/__init__.py
@@ -4,8 +4,7 @@
 from aiohttp import web
 import voluptuous as vol
 
-from homeassistant.components.device_tracker import DOMAIN as DEVICE_TRACKER
-from homeassistant.const import ATTR_ID, CONF_WEBHOOK_ID
+from homeassistant.const import ATTR_ID, CONF_WEBHOOK_ID, Platform
 from homeassistant.helpers import config_entry_flow
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.dispatcher import async_dispatcher_send
@@ -22,7 +21,7 @@
     DOMAIN,
 )
 
-PLATFORMS = [DEVICE_TRACKER]
+PLATFORMS = [Platform.DEVICE_TRACKER]
 
 
 TRACKER_UPDATE = f"{DOMAIN}_tracker_update"
diff --git a/homeassistant/components/tractive/__init__.py b/homeassistant/components/tractive/__init__.py
index 66a2afccb43b4..496ae3a85d0b6 100644
--- a/homeassistant/components/tractive/__init__.py
+++ b/homeassistant/components/tractive/__init__.py
@@ -15,6 +15,7 @@
     CONF_EMAIL,
     CONF_PASSWORD,
     EVENT_HOMEASSISTANT_STOP,
+    Platform,
 )
 from homeassistant.core import Event, HomeAssistant
 from homeassistant.exceptions import ConfigEntryAuthFailed, ConfigEntryNotReady
@@ -38,7 +39,12 @@
     TRACKER_POSITION_UPDATED,
 )
 
-PLATFORMS = ["binary_sensor", "device_tracker", "sensor", "switch"]
+PLATFORMS = [
+    Platform.BINARY_SENSOR,
+    Platform.DEVICE_TRACKER,
+    Platform.SENSOR,
+    Platform.SWITCH,
+]
 
 
 _LOGGER = logging.getLogger(__name__)
diff --git a/homeassistant/components/tradfri/const.py b/homeassistant/components/tradfri/const.py
index abd3e8aff4a33..b0c3955453cf1 100644
--- a/homeassistant/components/tradfri/const.py
+++ b/homeassistant/components/tradfri/const.py
@@ -1,6 +1,9 @@
 """Consts used by Tradfri."""
 from homeassistant.components.light import SUPPORT_BRIGHTNESS, SUPPORT_TRANSITION
-from homeassistant.const import CONF_HOST  # noqa: F401 pylint: disable=unused-import
+from homeassistant.const import (  # noqa: F401 pylint: disable=unused-import
+    CONF_HOST,
+    Platform,
+)
 
 ATTR_AUTO = "Auto"
 ATTR_DIMMER = "dimmer"
@@ -25,5 +28,11 @@
 KEY_SECURITY_CODE = "security_code"
 SUPPORTED_GROUP_FEATURES = SUPPORT_BRIGHTNESS | SUPPORT_TRANSITION
 SUPPORTED_LIGHT_FEATURES = SUPPORT_TRANSITION
-PLATFORMS = ["cover", "fan", "light", "sensor", "switch"]
+PLATFORMS = [
+    Platform.COVER,
+    Platform.FAN,
+    Platform.LIGHT,
+    Platform.SENSOR,
+    Platform.SWITCH,
+]
 TIMEOUT_API = 30
diff --git a/homeassistant/components/trafikverket_weatherstation/const.py b/homeassistant/components/trafikverket_weatherstation/const.py
index bfda57820849c..3c2cfc4d165c1 100644
--- a/homeassistant/components/trafikverket_weatherstation/const.py
+++ b/homeassistant/components/trafikverket_weatherstation/const.py
@@ -1,8 +1,9 @@
 """Adds constants for Trafikverket Weather integration."""
+from homeassistant.const import Platform
 
 DOMAIN = "trafikverket_weatherstation"
 CONF_STATION = "station"
-PLATFORMS = ["sensor"]
+PLATFORMS = [Platform.SENSOR]
 ATTRIBUTION = "Data provided by Trafikverket"
 ATTR_MEASURE_TIME = "measure_time"
 ATTR_ACTIVE = "active"
diff --git a/homeassistant/components/transmission/__init__.py b/homeassistant/components/transmission/__init__.py
index f40f0bd7d826c..f514f751149dd 100644
--- a/homeassistant/components/transmission/__init__.py
+++ b/homeassistant/components/transmission/__init__.py
@@ -17,6 +17,7 @@
     CONF_PORT,
     CONF_SCAN_INTERVAL,
     CONF_USERNAME,
+    Platform,
 )
 from homeassistant.exceptions import ConfigEntryNotReady
 from homeassistant.helpers import config_validation as cv
@@ -95,7 +96,7 @@
     extra=vol.ALLOW_EXTRA,
 )
 
-PLATFORMS = ["sensor", "switch"]
+PLATFORMS = [Platform.SENSOR, Platform.SWITCH]
 
 
 async def async_setup(hass, config):
diff --git a/homeassistant/components/tuya/const.py b/homeassistant/components/tuya/const.py
index fa69b76695c32..4fc2f37f1065b 100644
--- a/homeassistant/components/tuya/const.py
+++ b/homeassistant/components/tuya/const.py
@@ -35,6 +35,7 @@
     TEMP_FAHRENHEIT,
     VOLUME_CUBIC_FEET,
     VOLUME_CUBIC_METERS,
+    Platform,
 )
 
 DOMAIN = "tuya"
@@ -77,21 +78,21 @@
 SMARTLIFE_APP = "smartlife"
 
 PLATFORMS = [
-    "binary_sensor",
-    "button",
-    "camera",
-    "climate",
-    "cover",
-    "fan",
-    "humidifier",
-    "light",
-    "number",
-    "scene",
-    "select",
-    "sensor",
-    "siren",
-    "switch",
-    "vacuum",
+    Platform.BINARY_SENSOR,
+    Platform.BUTTON,
+    Platform.CAMERA,
+    Platform.CLIMATE,
+    Platform.COVER,
+    Platform.FAN,
+    Platform.HUMIDIFIER,
+    Platform.LIGHT,
+    Platform.NUMBER,
+    Platform.SCENE,
+    Platform.SELECT,
+    Platform.SENSOR,
+    Platform.SIREN,
+    Platform.SWITCH,
+    Platform.VACUUM,
 ]
 
 
diff --git a/homeassistant/components/twentemilieu/__init__.py b/homeassistant/components/twentemilieu/__init__.py
index 60b7d07808b1f..576ab2068a7e4 100644
--- a/homeassistant/components/twentemilieu/__init__.py
+++ b/homeassistant/components/twentemilieu/__init__.py
@@ -7,7 +7,7 @@
 import voluptuous as vol
 
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_ID
+from homeassistant.const import CONF_ID, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers import config_validation as cv
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
@@ -20,7 +20,7 @@
 SERVICE_UPDATE = "update"
 SERVICE_SCHEMA = vol.Schema({vol.Optional(CONF_ID): cv.string})
 
-PLATFORMS = ["sensor"]
+PLATFORMS = [Platform.SENSOR]
 
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
diff --git a/homeassistant/components/twinkly/__init__.py b/homeassistant/components/twinkly/__init__.py
index 3a9a2a8faa2c0..ee52d5473de07 100644
--- a/homeassistant/components/twinkly/__init__.py
+++ b/homeassistant/components/twinkly/__init__.py
@@ -3,12 +3,13 @@
 import twinkly_client
 
 from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
 
 from .const import CONF_ENTRY_HOST, CONF_ENTRY_ID, DOMAIN
 
-PLATFORMS = ["light"]
+PLATFORMS = [Platform.LIGHT]
 
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
diff --git a/homeassistant/components/unifi/controller.py b/homeassistant/components/unifi/controller.py
index 26463563db286..98eb377dab3bc 100644
--- a/homeassistant/components/unifi/controller.py
+++ b/homeassistant/components/unifi/controller.py
@@ -26,9 +26,6 @@
 from aiounifi.websocket import STATE_DISCONNECTED, STATE_RUNNING
 import async_timeout
 
-from homeassistant.components.device_tracker import DOMAIN as TRACKER_DOMAIN
-from homeassistant.components.sensor import DOMAIN as SENSOR_DOMAIN
-from homeassistant.components.switch import DOMAIN as SWITCH_DOMAIN
 from homeassistant.components.unifi.switch import BLOCK_SWITCH, POE_SWITCH
 from homeassistant.const import (
     CONF_HOST,
@@ -36,6 +33,7 @@
     CONF_PORT,
     CONF_USERNAME,
     CONF_VERIFY_SSL,
+    Platform,
 )
 from homeassistant.core import callback
 from homeassistant.exceptions import ConfigEntryAuthFailed, ConfigEntryNotReady
@@ -75,7 +73,7 @@
 
 RETRY_TIMER = 15
 CHECK_HEARTBEAT_INTERVAL = timedelta(seconds=1)
-PLATFORMS = [TRACKER_DOMAIN, SENSOR_DOMAIN, SWITCH_DOMAIN]
+PLATFORMS = [Platform.DEVICE_TRACKER, Platform.SENSOR, Platform.SWITCH]
 
 CLIENT_CONNECTED = (
     WIRED_CLIENT_CONNECTED,
@@ -337,9 +335,9 @@ async def async_setup(self):
         for entry in async_entries_for_config_entry(
             entity_registry, self.config_entry.entry_id
         ):
-            if entry.domain == TRACKER_DOMAIN:
+            if entry.domain == Platform.DEVICE_TRACKER:
                 mac = entry.unique_id.split("-", 1)[0]
-            elif entry.domain == SWITCH_DOMAIN and (
+            elif entry.domain == Platform.SWITCH and (
                 entry.unique_id.startswith(BLOCK_SWITCH)
                 or entry.unique_id.startswith(POE_SWITCH)
             ):
diff --git a/homeassistant/components/upb/__init__.py b/homeassistant/components/upb/__init__.py
index 90d7c35cf64b1..acdf8c045a1a6 100644
--- a/homeassistant/components/upb/__init__.py
+++ b/homeassistant/components/upb/__init__.py
@@ -2,7 +2,7 @@
 
 import upb_lib
 
-from homeassistant.const import ATTR_COMMAND, CONF_FILE_PATH, CONF_HOST
+from homeassistant.const import ATTR_COMMAND, CONF_FILE_PATH, CONF_HOST, Platform
 from homeassistant.core import callback
 from homeassistant.helpers.entity import DeviceInfo, Entity
 
@@ -14,7 +14,7 @@
     EVENT_UPB_SCENE_CHANGED,
 )
 
-PLATFORMS = ["light", "scene"]
+PLATFORMS = [Platform.LIGHT, Platform.SCENE]
 
 
 async def async_setup_entry(hass, config_entry):
diff --git a/homeassistant/components/upcloud/__init__.py b/homeassistant/components/upcloud/__init__.py
index 2ecc6ec7522ae..bbce9cd5304d9 100644
--- a/homeassistant/components/upcloud/__init__.py
+++ b/homeassistant/components/upcloud/__init__.py
@@ -9,8 +9,6 @@
 import requests.exceptions
 import upcloud_api
 
-from homeassistant.components.binary_sensor import DOMAIN as BINARY_SENSOR_DOMAIN
-from homeassistant.components.switch import DOMAIN as SWITCH_DOMAIN
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import (
     CONF_PASSWORD,
@@ -19,6 +17,7 @@
     STATE_OFF,
     STATE_ON,
     STATE_PROBLEM,
+    Platform,
 )
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryNotReady
@@ -48,7 +47,7 @@
 
 DEFAULT_COMPONENT_NAME = "UpCloud {}"
 
-CONFIG_ENTRY_DOMAINS = {BINARY_SENSOR_DOMAIN, SWITCH_DOMAIN}
+PLATFORMS = [Platform.BINARY_SENSOR, Platform.SWITCH]
 
 SIGNAL_UPDATE_UPCLOUD = "upcloud_update"
 
@@ -157,7 +156,7 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     hass.data[DATA_UPCLOUD].coordinators[entry.data[CONF_USERNAME]] = coordinator
 
     # Forward entry setup
-    hass.config_entries.async_setup_platforms(entry, CONFIG_ENTRY_DOMAINS)
+    hass.config_entries.async_setup_platforms(entry, PLATFORMS)
 
     return True
 
@@ -165,7 +164,7 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
 async def async_unload_entry(hass: HomeAssistant, config_entry: ConfigEntry) -> bool:
     """Unload the config entry."""
     unload_ok = await hass.config_entries.async_unload_platforms(
-        config_entry, CONFIG_ENTRY_DOMAINS
+        config_entry, PLATFORMS
     )
 
     hass.data[DATA_UPCLOUD].coordinators.pop(config_entry.data[CONF_USERNAME])
diff --git a/homeassistant/components/upnp/__init__.py b/homeassistant/components/upnp/__init__.py
index da0585df9879c..5180932080c67 100644
--- a/homeassistant/components/upnp/__init__.py
+++ b/homeassistant/components/upnp/__init__.py
@@ -16,6 +16,7 @@
 from homeassistant.components.binary_sensor import BinarySensorEntityDescription
 from homeassistant.components.sensor import SensorEntityDescription
 from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryNotReady
 from homeassistant.helpers import device_registry as dr
@@ -43,7 +44,7 @@
 NOTIFICATION_ID = "upnp_notification"
 NOTIFICATION_TITLE = "UPnP/IGD Setup"
 
-PLATFORMS = ["binary_sensor", "sensor"]
+PLATFORMS = [Platform.BINARY_SENSOR, Platform.SENSOR]
 
 CONFIG_SCHEMA = vol.Schema(
     vol.All(
diff --git a/homeassistant/components/uptimerobot/const.py b/homeassistant/components/uptimerobot/const.py
index 1c9bbe3e00b53..7637a61c593db 100644
--- a/homeassistant/components/uptimerobot/const.py
+++ b/homeassistant/components/uptimerobot/const.py
@@ -5,13 +5,15 @@
 from logging import Logger, getLogger
 from typing import Final
 
+from homeassistant.const import Platform
+
 LOGGER: Logger = getLogger(__package__)
 
 # The free plan is limited to 10 requests/minute
 COORDINATOR_UPDATE_INTERVAL: timedelta = timedelta(seconds=10)
 
 DOMAIN: Final = "uptimerobot"
-PLATFORMS: Final = ["binary_sensor"]
+PLATFORMS: Final = [Platform.BINARY_SENSOR]
 
 ATTRIBUTION: Final = "Data provided by UptimeRobot"
 
diff --git a/homeassistant/components/velbus/__init__.py b/homeassistant/components/velbus/__init__.py
index 330a4315a25c8..d2aa9531467bf 100644
--- a/homeassistant/components/velbus/__init__.py
+++ b/homeassistant/components/velbus/__init__.py
@@ -8,7 +8,7 @@
 import voluptuous as vol
 
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_ADDRESS, CONF_PORT
+from homeassistant.const import CONF_ADDRESS, CONF_PORT, Platform
 from homeassistant.core import HomeAssistant, ServiceCall
 from homeassistant.helpers import device_registry
 import homeassistant.helpers.config_validation as cv
@@ -26,7 +26,14 @@
 
 _LOGGER = logging.getLogger(__name__)
 
-PLATFORMS = ["switch", "sensor", "binary_sensor", "cover", "climate", "light"]
+PLATFORMS = [
+    Platform.BINARY_SENSOR,
+    Platform.CLIMATE,
+    Platform.COVER,
+    Platform.LIGHT,
+    Platform.SENSOR,
+    Platform.SWITCH,
+]
 
 
 async def velbus_connect_task(
diff --git a/homeassistant/components/venstar/__init__.py b/homeassistant/components/venstar/__init__.py
index 2ed6080f84fe8..be082d0ad858a 100644
--- a/homeassistant/components/venstar/__init__.py
+++ b/homeassistant/components/venstar/__init__.py
@@ -12,6 +12,7 @@
     CONF_PIN,
     CONF_SSL,
     CONF_USERNAME,
+    Platform,
 )
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers import update_coordinator
@@ -19,7 +20,7 @@
 
 from .const import _LOGGER, DOMAIN, VENSTAR_TIMEOUT
 
-PLATFORMS = ["binary_sensor", "climate", "sensor"]
+PLATFORMS = [Platform.BINARY_SENSOR, Platform.CLIMATE, Platform.SENSOR]
 
 
 async def async_setup_entry(hass, config):
diff --git a/homeassistant/components/verisure/__init__.py b/homeassistant/components/verisure/__init__.py
index bea82a4785cac..d42a6ad004ba8 100644
--- a/homeassistant/components/verisure/__init__.py
+++ b/homeassistant/components/verisure/__init__.py
@@ -4,16 +4,8 @@
 from contextlib import suppress
 import os
 
-from homeassistant.components.alarm_control_panel import (
-    DOMAIN as ALARM_CONTROL_PANEL_DOMAIN,
-)
-from homeassistant.components.binary_sensor import DOMAIN as BINARY_SENSOR_DOMAIN
-from homeassistant.components.camera import DOMAIN as CAMERA_DOMAIN
-from homeassistant.components.lock import DOMAIN as LOCK_DOMAIN
-from homeassistant.components.sensor import DOMAIN as SENSOR_DOMAIN
-from homeassistant.components.switch import DOMAIN as SWITCH_DOMAIN
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import EVENT_HOMEASSISTANT_STOP
+from homeassistant.const import EVENT_HOMEASSISTANT_STOP, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryAuthFailed
 import homeassistant.helpers.config_validation as cv
@@ -23,12 +15,12 @@
 from .coordinator import VerisureDataUpdateCoordinator
 
 PLATFORMS = [
-    ALARM_CONTROL_PANEL_DOMAIN,
-    BINARY_SENSOR_DOMAIN,
-    CAMERA_DOMAIN,
-    LOCK_DOMAIN,
-    SENSOR_DOMAIN,
-    SWITCH_DOMAIN,
+    Platform.ALARM_CONTROL_PANEL,
+    Platform.BINARY_SENSOR,
+    Platform.CAMERA,
+    Platform.LOCK,
+    Platform.SENSOR,
+    Platform.SWITCH,
 ]
 
 CONFIG_SCHEMA = cv.removed(DOMAIN, raise_if_present=False)
diff --git a/homeassistant/components/vicare/const.py b/homeassistant/components/vicare/const.py
index db8b782399e10..c5f78f31fc068 100644
--- a/homeassistant/components/vicare/const.py
+++ b/homeassistant/components/vicare/const.py
@@ -6,11 +6,17 @@
     DEVICE_CLASS_GAS,
     ENERGY_KILO_WATT_HOUR,
     VOLUME_CUBIC_METERS,
+    Platform,
 )
 
 DOMAIN = "vicare"
 
-PLATFORMS = ["climate", "sensor", "binary_sensor", "water_heater"]
+PLATFORMS = [
+    Platform.CLIMATE,
+    Platform.SENSOR,
+    Platform.BINARY_SENSOR,
+    Platform.WATER_HEATER,
+]
 
 VICARE_DEVICE_CONFIG = "device_conf"
 VICARE_API = "api"
diff --git a/homeassistant/components/vilfo/__init__.py b/homeassistant/components/vilfo/__init__.py
index b2e460c85f259..ac3b8b87f3ff7 100644
--- a/homeassistant/components/vilfo/__init__.py
+++ b/homeassistant/components/vilfo/__init__.py
@@ -6,14 +6,14 @@
 from vilfo.exceptions import VilfoException
 
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_ACCESS_TOKEN, CONF_HOST
+from homeassistant.const import CONF_ACCESS_TOKEN, CONF_HOST, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryNotReady
 from homeassistant.util import Throttle
 
 from .const import ATTR_BOOT_TIME, ATTR_LOAD, DOMAIN, ROUTER_DEFAULT_HOST
 
-PLATFORMS = ["sensor"]
+PLATFORMS = [Platform.SENSOR]
 
 DEFAULT_SCAN_INTERVAL = timedelta(seconds=30)
 
diff --git a/homeassistant/components/vizio/__init__.py b/homeassistant/components/vizio/__init__.py
index aec6f38a1b1f7..e66a8f3a55422 100644
--- a/homeassistant/components/vizio/__init__.py
+++ b/homeassistant/components/vizio/__init__.py
@@ -11,6 +11,7 @@
 
 from homeassistant.components.media_player import DEVICE_CLASS_TV
 from homeassistant.config_entries import SOURCE_IMPORT, ConfigEntry, ConfigEntryState
+from homeassistant.const import Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers import config_validation as cv
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
@@ -40,7 +41,7 @@ def validate_apps(config: ConfigType) -> ConfigType:
     extra=vol.ALLOW_EXTRA,
 )
 
-PLATFORMS = ["media_player"]
+PLATFORMS = [Platform.MEDIA_PLAYER]
 
 
 async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
diff --git a/homeassistant/components/vlc_telnet/__init__.py b/homeassistant/components/vlc_telnet/__init__.py
index 72bbf57ff9448..9fe3b97ab3167 100644
--- a/homeassistant/components/vlc_telnet/__init__.py
+++ b/homeassistant/components/vlc_telnet/__init__.py
@@ -3,13 +3,13 @@
 from aiovlc.exceptions import AuthError, ConnectError
 
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_HOST, CONF_PASSWORD, CONF_PORT
+from homeassistant.const import CONF_HOST, CONF_PASSWORD, CONF_PORT, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryAuthFailed
 
 from .const import DATA_AVAILABLE, DATA_VLC, DOMAIN, LOGGER
 
-PLATFORMS = ["media_player"]
+PLATFORMS = [Platform.MEDIA_PLAYER]
 
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
diff --git a/homeassistant/components/volumio/__init__.py b/homeassistant/components/volumio/__init__.py
index 215cd2e1aff21..8189aeef1f46f 100644
--- a/homeassistant/components/volumio/__init__.py
+++ b/homeassistant/components/volumio/__init__.py
@@ -3,14 +3,14 @@
 from pyvolumio import CannotConnectError, Volumio
 
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_HOST, CONF_PORT
+from homeassistant.const import CONF_HOST, CONF_PORT, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryNotReady
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
 
 from .const import DATA_INFO, DATA_VOLUMIO, DOMAIN
 
-PLATFORMS = ["media_player"]
+PLATFORMS = [Platform.MEDIA_PLAYER]
 
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
diff --git a/homeassistant/components/wallbox/__init__.py b/homeassistant/components/wallbox/__init__.py
index c40d3fb37a840..103a293c39fad 100644
--- a/homeassistant/components/wallbox/__init__.py
+++ b/homeassistant/components/wallbox/__init__.py
@@ -10,7 +10,7 @@
 from wallbox import Wallbox
 
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_PASSWORD, CONF_USERNAME
+from homeassistant.const import CONF_PASSWORD, CONF_USERNAME, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryAuthFailed, HomeAssistantError
 from homeassistant.helpers.update_coordinator import DataUpdateCoordinator
@@ -19,7 +19,7 @@
 
 _LOGGER = logging.getLogger(__name__)
 
-PLATFORMS = ["sensor", "number"]
+PLATFORMS = [Platform.SENSOR, Platform.NUMBER]
 UPDATE_INTERVAL = 30
 
 
diff --git a/homeassistant/components/watttime/__init__.py b/homeassistant/components/watttime/__init__.py
index d33e6fceb2e01..2f07658b923f5 100644
--- a/homeassistant/components/watttime/__init__.py
+++ b/homeassistant/components/watttime/__init__.py
@@ -13,6 +13,7 @@
     CONF_LONGITUDE,
     CONF_PASSWORD,
     CONF_USERNAME,
+    Platform,
 )
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryAuthFailed
@@ -23,7 +24,7 @@
 
 DEFAULT_UPDATE_INTERVAL = timedelta(minutes=5)
 
-PLATFORMS: list[str] = ["sensor"]
+PLATFORMS: list[Platform] = [Platform.SENSOR]
 
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
diff --git a/homeassistant/components/waze_travel_time/__init__.py b/homeassistant/components/waze_travel_time/__init__.py
index fa605d19c4924..3b193d6c06bb0 100644
--- a/homeassistant/components/waze_travel_time/__init__.py
+++ b/homeassistant/components/waze_travel_time/__init__.py
@@ -1,12 +1,13 @@
 """The waze_travel_time component."""
 from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_registry import (
     async_entries_for_config_entry,
     async_get,
 )
 
-PLATFORMS = ["sensor"]
+PLATFORMS = [Platform.SENSOR]
 
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
diff --git a/homeassistant/components/whirlpool/__init__.py b/homeassistant/components/whirlpool/__init__.py
index c53b9a59ef4e6..659b4602f0d86 100644
--- a/homeassistant/components/whirlpool/__init__.py
+++ b/homeassistant/components/whirlpool/__init__.py
@@ -5,6 +5,7 @@
 from whirlpool.auth import Auth
 
 from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryNotReady
 
@@ -12,7 +13,7 @@
 
 _LOGGER = logging.getLogger(__name__)
 
-PLATFORMS = ["climate"]
+PLATFORMS = [Platform.CLIMATE]
 
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
diff --git a/homeassistant/components/wiffi/__init__.py b/homeassistant/components/wiffi/__init__.py
index a7f6b8a7b2279..ab5bda8dd1d96 100644
--- a/homeassistant/components/wiffi/__init__.py
+++ b/homeassistant/components/wiffi/__init__.py
@@ -6,7 +6,7 @@
 from wiffi import WiffiTcpServer
 
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_PORT, CONF_TIMEOUT
+from homeassistant.const import CONF_PORT, CONF_TIMEOUT, Platform
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.exceptions import ConfigEntryNotReady
 from homeassistant.helpers import device_registry
@@ -29,7 +29,7 @@
 _LOGGER = logging.getLogger(__name__)
 
 
-PLATFORMS = ["sensor", "binary_sensor"]
+PLATFORMS = [Platform.BINARY_SENSOR, Platform.SENSOR]
 
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
diff --git a/homeassistant/components/wilight/__init__.py b/homeassistant/components/wilight/__init__.py
index c77814519a1c5..932ce1538bf4d 100644
--- a/homeassistant/components/wilight/__init__.py
+++ b/homeassistant/components/wilight/__init__.py
@@ -1,6 +1,7 @@
 """The WiLight integration."""
 
 from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import Platform
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.exceptions import ConfigEntryNotReady
 from homeassistant.helpers.entity import DeviceInfo, Entity
@@ -10,7 +11,7 @@
 DOMAIN = "wilight"
 
 # List the platforms that you want to support.
-PLATFORMS = ["cover", "fan", "light"]
+PLATFORMS = [Platform.COVER, Platform.FAN, Platform.LIGHT]
 
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
diff --git a/homeassistant/components/wolflink/__init__.py b/homeassistant/components/wolflink/__init__.py
index e15a5225475d8..19cafa89a1350 100644
--- a/homeassistant/components/wolflink/__init__.py
+++ b/homeassistant/components/wolflink/__init__.py
@@ -7,7 +7,7 @@
 from wolf_smartset.wolf_client import FetchFailed, ParameterReadError, WolfClient
 
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_PASSWORD, CONF_USERNAME
+from homeassistant.const import CONF_PASSWORD, CONF_USERNAME, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryNotReady
 from homeassistant.helpers.update_coordinator import DataUpdateCoordinator, UpdateFailed
@@ -23,7 +23,7 @@
 
 _LOGGER = logging.getLogger(__name__)
 
-PLATFORMS = ["sensor"]
+PLATFORMS = [Platform.SENSOR]
 
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
diff --git a/homeassistant/components/xbox/__init__.py b/homeassistant/components/xbox/__init__.py
index 2a09c46598421..0466d0191cf66 100644
--- a/homeassistant/components/xbox/__init__.py
+++ b/homeassistant/components/xbox/__init__.py
@@ -21,7 +21,7 @@
 )
 
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_CLIENT_ID, CONF_CLIENT_SECRET
+from homeassistant.const import CONF_CLIENT_ID, CONF_CLIENT_SECRET, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers import (
     aiohttp_client,
@@ -48,7 +48,12 @@
     extra=vol.ALLOW_EXTRA,
 )
 
-PLATFORMS = ["media_player", "remote", "binary_sensor", "sensor"]
+PLATFORMS = [
+    Platform.BINARY_SENSOR,
+    Platform.MEDIA_PLAYER,
+    Platform.REMOTE,
+    Platform.SENSOR,
+]
 
 
 async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
diff --git a/homeassistant/components/xiaomi_aqara/__init__.py b/homeassistant/components/xiaomi_aqara/__init__.py
index 7aff6ece0e1fa..ce3e5d72e0dd3 100644
--- a/homeassistant/components/xiaomi_aqara/__init__.py
+++ b/homeassistant/components/xiaomi_aqara/__init__.py
@@ -15,6 +15,7 @@
     CONF_PORT,
     CONF_PROTOCOL,
     EVENT_HOMEASSISTANT_STOP,
+    Platform,
 )
 from homeassistant.core import callback
 from homeassistant.helpers import device_registry as dr
@@ -36,8 +37,15 @@
 
 _LOGGER = logging.getLogger(__name__)
 
-GATEWAY_PLATFORMS = ["binary_sensor", "sensor", "switch", "light", "cover", "lock"]
-GATEWAY_PLATFORMS_NO_KEY = ["binary_sensor", "sensor"]
+GATEWAY_PLATFORMS = [
+    Platform.BINARY_SENSOR,
+    Platform.COVER,
+    Platform.LIGHT,
+    Platform.LOCK,
+    Platform.SENSOR,
+    Platform.SWITCH,
+]
+GATEWAY_PLATFORMS_NO_KEY = [Platform.BINARY_SENSOR, Platform.SENSOR]
 
 ATTR_GW_MAC = "gw_mac"
 ATTR_RINGTONE_ID = "ringtone_id"
diff --git a/homeassistant/components/xiaomi_miio/__init__.py b/homeassistant/components/xiaomi_miio/__init__.py
index 62935f5e38b90..009b068a521bf 100644
--- a/homeassistant/components/xiaomi_miio/__init__.py
+++ b/homeassistant/components/xiaomi_miio/__init__.py
@@ -33,7 +33,7 @@
 from miio.gateway.gateway import GatewayException
 
 from homeassistant import config_entries, core
-from homeassistant.const import CONF_HOST, CONF_TOKEN
+from homeassistant.const import CONF_HOST, CONF_TOKEN, Platform
 from homeassistant.core import callback
 from homeassistant.exceptions import ConfigEntryAuthFailed, ConfigEntryNotReady
 from homeassistant.helpers import device_registry as dr, entity_registry as er
@@ -78,20 +78,32 @@
 POLLING_TIMEOUT_SEC = 10
 UPDATE_INTERVAL = timedelta(seconds=15)
 
-GATEWAY_PLATFORMS = ["alarm_control_panel", "light", "sensor", "switch"]
-SWITCH_PLATFORMS = ["switch"]
-FAN_PLATFORMS = ["binary_sensor", "fan", "number", "select", "sensor", "switch"]
+GATEWAY_PLATFORMS = [
+    Platform.ALARM_CONTROL_PANEL,
+    Platform.LIGHT,
+    Platform.SENSOR,
+    Platform.SWITCH,
+]
+SWITCH_PLATFORMS = [Platform.SWITCH]
+FAN_PLATFORMS = [
+    Platform.BINARY_SENSOR,
+    Platform.FAN,
+    Platform.NUMBER,
+    Platform.SELECT,
+    Platform.SENSOR,
+    Platform.SWITCH,
+]
 HUMIDIFIER_PLATFORMS = [
-    "binary_sensor",
-    "humidifier",
-    "number",
-    "select",
-    "sensor",
-    "switch",
+    Platform.BINARY_SENSOR,
+    Platform.HUMIDIFIER,
+    Platform.NUMBER,
+    Platform.SELECT,
+    Platform.SENSOR,
+    Platform.SWITCH,
 ]
-LIGHT_PLATFORMS = ["light"]
-VACUUM_PLATFORMS = ["binary_sensor", "sensor", "vacuum"]
-AIR_MONITOR_PLATFORMS = ["air_quality", "sensor"]
+LIGHT_PLATFORMS = [Platform.LIGHT]
+VACUUM_PLATFORMS = [Platform.BINARY_SENSOR, Platform.SENSOR, Platform.VACUUM]
+AIR_MONITOR_PLATFORMS = [Platform.AIR_QUALITY, Platform.SENSOR]
 
 MODEL_TO_CLASS_MAP = {
     MODEL_FAN_1C: Fan1C,
diff --git a/homeassistant/components/yale_smart_alarm/const.py b/homeassistant/components/yale_smart_alarm/const.py
index cbb96579f4f90..6bf61cea610dc 100644
--- a/homeassistant/components/yale_smart_alarm/const.py
+++ b/homeassistant/components/yale_smart_alarm/const.py
@@ -11,6 +11,7 @@
     STATE_ALARM_ARMED_AWAY,
     STATE_ALARM_ARMED_HOME,
     STATE_ALARM_DISARMED,
+    Platform,
 )
 
 CONF_AREA_ID = "area_id"
@@ -30,7 +31,7 @@
 ATTR_ONLINE = "online"
 ATTR_STATUS = "status"
 
-PLATFORMS = ["alarm_control_panel"]
+PLATFORMS = [Platform.ALARM_CONTROL_PANEL]
 
 STATE_MAP = {
     YALE_STATE_DISARM: STATE_ALARM_DISARMED,
diff --git a/homeassistant/components/yamaha_musiccast/__init__.py b/homeassistant/components/yamaha_musiccast/__init__.py
index 194168b2eee3c..142af2d769b59 100644
--- a/homeassistant/components/yamaha_musiccast/__init__.py
+++ b/homeassistant/components/yamaha_musiccast/__init__.py
@@ -10,7 +10,7 @@
 
 from homeassistant.components import ssdp
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_HOST
+from homeassistant.const import CONF_HOST, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
 from homeassistant.helpers.device_registry import CONNECTION_NETWORK_MAC, format_mac
@@ -30,7 +30,7 @@
     ENTITY_CATEGORY_MAPPING,
 )
 
-PLATFORMS = ["media_player", "number"]
+PLATFORMS = [Platform.MEDIA_PLAYER, Platform.NUMBER]
 
 _LOGGER = logging.getLogger(__name__)
 SCAN_INTERVAL = timedelta(seconds=60)
diff --git a/homeassistant/components/yeelight/const.py b/homeassistant/components/yeelight/const.py
index 2b494bf9ef282..28b5591dcbf2c 100644
--- a/homeassistant/components/yeelight/const.py
+++ b/homeassistant/components/yeelight/const.py
@@ -2,6 +2,8 @@
 
 from datetime import timedelta
 
+from homeassistant.const import Platform
+
 DOMAIN = "yeelight"
 
 
@@ -100,4 +102,4 @@
 ]
 
 
-PLATFORMS = ["binary_sensor", "light"]
+PLATFORMS = [Platform.BINARY_SENSOR, Platform.LIGHT]
diff --git a/homeassistant/components/youless/__init__.py b/homeassistant/components/youless/__init__.py
index 0980e4510287e..3339cdccd36d6 100644
--- a/homeassistant/components/youless/__init__.py
+++ b/homeassistant/components/youless/__init__.py
@@ -6,14 +6,14 @@
 from youless_api import YoulessAPI
 
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_HOST
+from homeassistant.const import CONF_HOST, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryNotReady
 from homeassistant.helpers.update_coordinator import DataUpdateCoordinator
 
 from .const import DOMAIN
 
-PLATFORMS = ["sensor"]
+PLATFORMS = [Platform.SENSOR]
 
 _LOGGER = logging.getLogger(__name__)
 
diff --git a/homeassistant/components/zerproc/__init__.py b/homeassistant/components/zerproc/__init__.py
index ec48fb90345f5..459024ec34ca9 100644
--- a/homeassistant/components/zerproc/__init__.py
+++ b/homeassistant/components/zerproc/__init__.py
@@ -1,11 +1,12 @@
 """Zerproc lights integration."""
 
 from homeassistant.config_entries import SOURCE_IMPORT, ConfigEntry
+from homeassistant.const import Platform
 from homeassistant.core import HomeAssistant
 
 from .const import DATA_ADDRESSES, DATA_DISCOVERY_SUBSCRIPTION, DOMAIN
 
-PLATFORMS = ["light"]
+PLATFORMS = [Platform.LIGHT]
 
 
 async def async_setup(hass, config):