diff --git a/homeassistant/components/lacrosse/sensor.py b/homeassistant/components/lacrosse/sensor.py
index b3a944630b8..d334fb61d1f 100644
--- a/homeassistant/components/lacrosse/sensor.py
+++ b/homeassistant/components/lacrosse/sensor.py
@@ -1,4 +1,6 @@
 """Support for LaCrosse sensor components."""
+from __future__ import annotations
+
 from datetime import timedelta
 import logging
 
@@ -22,10 +24,12 @@ from homeassistant.const import (
     PERCENTAGE,
     TEMP_CELSIUS,
 )
-from homeassistant.core import callback
+from homeassistant.core import HomeAssistant, callback
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity import async_generate_entity_id
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.event import async_track_point_in_utc_time
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 from homeassistant.util import dt as dt_util
 
 _LOGGER = logging.getLogger(__name__)
@@ -67,10 +71,15 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
 )
 
 
-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 LaCrosse sensors."""
-    usb_device = config.get(CONF_DEVICE)
-    baud = int(config.get(CONF_BAUD))
+    usb_device = config[CONF_DEVICE]
+    baud = int(config[CONF_BAUD])
     expire_after = config.get(CONF_EXPIRE_AFTER)
 
     _LOGGER.debug("%s %s", usb_device, baud)
@@ -80,7 +89,7 @@ def setup_platform(hass, config, add_entities, discovery_info=None):
         lacrosse.open()
     except SerialException as exc:
         _LOGGER.warning("Unable to open serial port: %s", exc)
-        return False
+        return
 
     hass.bus.listen_once(EVENT_HOMEASSISTANT_STOP, lambda event: lacrosse.close())
 
diff --git a/homeassistant/components/lastfm/sensor.py b/homeassistant/components/lastfm/sensor.py
index 10623924c90..9c158b244cb 100644
--- a/homeassistant/components/lastfm/sensor.py
+++ b/homeassistant/components/lastfm/sensor.py
@@ -1,4 +1,6 @@
 """Sensor for Last.fm account status."""
+from __future__ import annotations
+
 import hashlib
 import logging
 import re
@@ -9,7 +11,10 @@ import voluptuous as vol
 
 from homeassistant.components.sensor import PLATFORM_SCHEMA, SensorEntity
 from homeassistant.const import ATTR_ATTRIBUTION, CONF_API_KEY
+from homeassistant.core import HomeAssistant
 import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -32,10 +37,15 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
 )
 
 
-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 Last.fm sensor platform."""
     api_key = config[CONF_API_KEY]
-    users = config.get(CONF_USERS)
+    users = config[CONF_USERS]
 
     lastfm_api = lastfm.LastFMNetwork(api_key=api_key)
 
diff --git a/homeassistant/components/lg_netcast/media_player.py b/homeassistant/components/lg_netcast/media_player.py
index 5938fc8d616..64ef4f0939f 100644
--- a/homeassistant/components/lg_netcast/media_player.py
+++ b/homeassistant/components/lg_netcast/media_player.py
@@ -1,4 +1,6 @@
 """Support for LG TV running on NetCast 3 or 4."""
+from __future__ import annotations
+
 from datetime import datetime, timedelta
 
 from pylgnetcast import LgNetCastClient, LgNetCastError
@@ -28,8 +30,11 @@ from homeassistant.const import (
     STATE_PAUSED,
     STATE_PLAYING,
 )
+from homeassistant.core import HomeAssistant
 import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.script import Script
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 from .const import DOMAIN
 
@@ -62,12 +67,17 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
 )
 
 
-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 LG TV platform."""
 
     host = config.get(CONF_HOST)
     access_token = config.get(CONF_ACCESS_TOKEN)
-    name = config.get(CONF_NAME)
+    name = config[CONF_NAME]
     on_action = config.get(CONF_ON_ACTION)
 
     client = LgNetCastClient(host, access_token)
diff --git a/homeassistant/components/limitlessled/light.py b/homeassistant/components/limitlessled/light.py
index 41b8f446541..e45a4a2ced0 100644
--- a/homeassistant/components/limitlessled/light.py
+++ b/homeassistant/components/limitlessled/light.py
@@ -1,4 +1,6 @@
 """Support for LimitlessLED bulbs."""
+from __future__ import annotations
+
 import logging
 
 from limitlessled import Color
@@ -31,8 +33,11 @@ from homeassistant.components.light import (
     LightEntity,
 )
 from homeassistant.const import CONF_HOST, CONF_NAME, CONF_PORT, CONF_TYPE, STATE_ON
+from homeassistant.core import HomeAssistant
 import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.restore_state import RestoreEntity
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 from homeassistant.util.color import color_hs_to_RGB, color_temperature_mired_to_kelvin
 
 _LOGGER = logging.getLogger(__name__)
@@ -143,7 +148,12 @@ def rewrite_legacy(config):
     return {"bridges": new_bridges}
 
 
-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 LimitlessLED lights."""
 
     # Two legacy configuration formats are supported to maintain backwards
@@ -152,7 +162,7 @@ def setup_platform(hass, config, add_entities, discovery_info=None):
 
     # Use the expanded configuration format.
     lights = []
-    for bridge_conf in config.get(CONF_BRIDGES):
+    for bridge_conf in config[CONF_BRIDGES]:
         bridge = Bridge(
             bridge_conf.get(CONF_HOST),
             port=bridge_conf.get(CONF_PORT, DEFAULT_PORT),
diff --git a/homeassistant/components/linode/binary_sensor.py b/homeassistant/components/linode/binary_sensor.py
index 46e9609aef8..67ccde764e1 100644
--- a/homeassistant/components/linode/binary_sensor.py
+++ b/homeassistant/components/linode/binary_sensor.py
@@ -1,4 +1,6 @@
 """Support for monitoring the state of Linode Nodes."""
+from __future__ import annotations
+
 import logging
 
 import voluptuous as vol
@@ -8,7 +10,10 @@ from homeassistant.components.binary_sensor import (
     BinarySensorDeviceClass,
     BinarySensorEntity,
 )
+from homeassistant.core import HomeAssistant
 import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 from . import (
     ATTR_CREATED,
@@ -31,10 +36,15 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
 )
 
 
-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 Linode droplet sensor."""
-    linode = hass.data.get(DATA_LINODE)
-    nodes = config.get(CONF_NODES)
+    linode = hass.data[DATA_LINODE]
+    nodes = config[CONF_NODES]
 
     dev = []
     for node in nodes:
diff --git a/homeassistant/components/linode/switch.py b/homeassistant/components/linode/switch.py
index 4a45b3fd793..76cd95e5bca 100644
--- a/homeassistant/components/linode/switch.py
+++ b/homeassistant/components/linode/switch.py
@@ -1,10 +1,15 @@
 """Support for interacting with Linode nodes."""
+from __future__ import annotations
+
 import logging
 
 import voluptuous as vol
 
 from homeassistant.components.switch import PLATFORM_SCHEMA, SwitchEntity
+from homeassistant.core import HomeAssistant
 import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 from . import (
     ATTR_CREATED,
@@ -28,10 +33,15 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
 )
 
 
-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 Linode Node switch."""
-    linode = hass.data.get(DATA_LINODE)
-    nodes = config.get(CONF_NODES)
+    linode = hass.data[DATA_LINODE]
+    nodes = config[CONF_NODES]
 
     dev = []
     for node in nodes:
diff --git a/homeassistant/components/logi_circle/sensor.py b/homeassistant/components/logi_circle/sensor.py
index 3d48c322756..da115f789da 100644
--- a/homeassistant/components/logi_circle/sensor.py
+++ b/homeassistant/components/logi_circle/sensor.py
@@ -5,6 +5,7 @@ import logging
 from typing import Any
 
 from homeassistant.components.sensor import SensorEntity, SensorEntityDescription
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import (
     ATTR_ATTRIBUTION,
     ATTR_BATTERY_CHARGING,
@@ -13,8 +14,11 @@ from homeassistant.const import (
     STATE_OFF,
     STATE_ON,
 )
+from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity import DeviceInfo
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.icon import icon_for_battery_level
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 from homeassistant.util.dt import as_local
 
 from .const import ATTRIBUTION, DEVICE_BRAND, DOMAIN as LOGI_CIRCLE_DOMAIN, SENSOR_TYPES
@@ -22,17 +26,24 @@ from .const import ATTRIBUTION, DEVICE_BRAND, DOMAIN as LOGI_CIRCLE_DOMAIN, SENS
 _LOGGER = logging.getLogger(__name__)
 
 
-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 a sensor for a Logi Circle device. Obsolete."""
     _LOGGER.warning("Logi Circle no longer works with sensor platform configuration")
 
 
-async def async_setup_entry(hass, entry, async_add_entities):
+async def async_setup_entry(
+    hass: HomeAssistant, entry: ConfigEntry, async_add_entities: AddEntitiesCallback
+) -> None:
     """Set up a Logi Circle sensor based on a config entry."""
     devices = await hass.data[LOGI_CIRCLE_DOMAIN].cameras
     time_zone = str(hass.config.time_zone)
 
-    monitored_conditions = entry.data.get(CONF_SENSORS).get(CONF_MONITORED_CONDITIONS)
+    monitored_conditions = entry.data[CONF_SENSORS].get(CONF_MONITORED_CONDITIONS)
     entities = [
         LogiSensor(device, time_zone, description)
         for description in SENSOR_TYPES
diff --git a/homeassistant/components/london_air/sensor.py b/homeassistant/components/london_air/sensor.py
index fb522054c5f..23bf3bb2e64 100644
--- a/homeassistant/components/london_air/sensor.py
+++ b/homeassistant/components/london_air/sensor.py
@@ -1,4 +1,6 @@
 """Sensor for checking the status of London air."""
+from __future__ import annotations
+
 from datetime import timedelta
 from http import HTTPStatus
 import logging
@@ -7,7 +9,10 @@ import requests
 import voluptuous as vol
 
 from homeassistant.components.sensor import PLATFORM_SCHEMA, SensorEntity
+from homeassistant.core import HomeAssistant
 import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 from homeassistant.util import Throttle
 
 _LOGGER = logging.getLogger(__name__)
@@ -60,12 +65,17 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
 )
 
 
-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 London Air sensor."""
     data = APIData()
     data.update()
     sensors = []
-    for name in config.get(CONF_LOCATIONS):
+    for name in config[CONF_LOCATIONS]:
         sensors.append(AirSensor(name, data))
 
     add_entities(sensors, True)
diff --git a/homeassistant/components/london_underground/sensor.py b/homeassistant/components/london_underground/sensor.py
index eb962772fe5..a73909295b6 100644
--- a/homeassistant/components/london_underground/sensor.py
+++ b/homeassistant/components/london_underground/sensor.py
@@ -1,4 +1,6 @@
 """Sensor for checking the status of London Underground tube lines."""
+from __future__ import annotations
+
 from datetime import timedelta
 
 from london_tube_status import TubeData
@@ -6,7 +8,10 @@ import voluptuous as vol
 
 from homeassistant.components.sensor import PLATFORM_SCHEMA, SensorEntity
 from homeassistant.const import ATTR_ATTRIBUTION
+from homeassistant.core import HomeAssistant
 import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 ATTRIBUTION = "Powered by TfL Open Data"
 
@@ -38,13 +43,18 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
 )
 
 
-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 Tube sensor."""
 
     data = TubeData()
     data.update()
     sensors = []
-    for line in config.get(CONF_LINE):
+    for line in config[CONF_LINE]:
         sensors.append(LondonTubeSensor(line, data))
 
     add_entities(sensors, True)
diff --git a/homeassistant/components/lutron/__init__.py b/homeassistant/components/lutron/__init__.py
index c785e8ea46f..b2b01aa3c44 100644
--- a/homeassistant/components/lutron/__init__.py
+++ b/homeassistant/components/lutron/__init__.py
@@ -11,9 +11,11 @@ from homeassistant.const import (
     CONF_USERNAME,
     Platform,
 )
+from homeassistant.core import HomeAssistant
 from homeassistant.helpers import discovery
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity import Entity
+from homeassistant.helpers.typing import ConfigType
 from homeassistant.util import slugify
 
 DOMAIN = "lutron"
@@ -50,7 +52,7 @@ CONFIG_SCHEMA = vol.Schema(
 )
 
 
-def setup(hass, base_config):
+def setup(hass: HomeAssistant, base_config: ConfigType) -> bool:
     """Set up the Lutron integration."""
     hass.data[LUTRON_BUTTONS] = []
     hass.data[LUTRON_CONTROLLER] = None
@@ -62,7 +64,7 @@ def setup(hass, base_config):
         "binary_sensor": [],
     }
 
-    config = base_config.get(DOMAIN)
+    config = base_config[DOMAIN]
     hass.data[LUTRON_CONTROLLER] = Lutron(
         config[CONF_HOST], config[CONF_USERNAME], config[CONF_PASSWORD]
     )