diff --git a/homeassistant/components/tado/binary_sensor.py b/homeassistant/components/tado/binary_sensor.py
index ef880bee50b..0eff510051d 100644
--- a/homeassistant/components/tado/binary_sensor.py
+++ b/homeassistant/components/tado/binary_sensor.py
@@ -108,7 +108,7 @@ class TadoDeviceBinarySensor(TadoDeviceEntity, BinarySensorEntity):
 
         self._state = None
 
-    async def async_added_to_hass(self):
+    async def async_added_to_hass(self) -> None:
         """Register for sensor updates."""
 
         self.async_on_remove(
@@ -184,7 +184,7 @@ class TadoZoneBinarySensor(TadoZoneEntity, BinarySensorEntity):
         self._state_attributes = None
         self._tado_zone_data = None
 
-    async def async_added_to_hass(self):
+    async def async_added_to_hass(self) -> None:
         """Register for sensor updates."""
 
         self.async_on_remove(
diff --git a/homeassistant/components/tado/climate.py b/homeassistant/components/tado/climate.py
index ae9c2097f75..879b13310a4 100644
--- a/homeassistant/components/tado/climate.py
+++ b/homeassistant/components/tado/climate.py
@@ -2,6 +2,7 @@
 from __future__ import annotations
 
 import logging
+from typing import Any
 
 import voluptuous as vol
 
@@ -273,7 +274,7 @@ class TadoClimate(TadoZoneEntity, ClimateEntity):
 
         self._async_update_zone_data()
 
-    async def async_added_to_hass(self):
+    async def async_added_to_hass(self) -> None:
         """Register for sensor updates."""
 
         self.async_on_remove(
@@ -349,7 +350,7 @@ class TadoClimate(TadoZoneEntity, ClimateEntity):
         """List of available fan modes."""
         return self._supported_fan_modes
 
-    def set_fan_mode(self, fan_mode: str):
+    def set_fan_mode(self, fan_mode: str) -> None:
         """Turn fan on/off."""
         self._control_hvac(fan_mode=HA_TO_TADO_FAN_MODE_MAP[fan_mode])
 
@@ -365,7 +366,7 @@ class TadoClimate(TadoZoneEntity, ClimateEntity):
         """Return a list of available preset modes."""
         return SUPPORT_PRESET
 
-    def set_preset_mode(self, preset_mode):
+    def set_preset_mode(self, preset_mode: str) -> None:
         """Set new preset mode."""
         self._tado.set_presence(preset_mode)
 
@@ -406,7 +407,7 @@ class TadoClimate(TadoZoneEntity, ClimateEntity):
 
         self._tado.set_temperature_offset(self._device_id, offset)
 
-    def set_temperature(self, **kwargs):
+    def set_temperature(self, **kwargs: Any) -> None:
         """Set new target temperature."""
         if (temperature := kwargs.get(ATTR_TEMPERATURE)) is None:
             return
@@ -428,7 +429,7 @@ class TadoClimate(TadoZoneEntity, ClimateEntity):
         self._control_hvac(hvac_mode=HA_TO_TADO_HVAC_MODE_MAP[hvac_mode])
 
     @property
-    def available(self):
+    def available(self) -> bool:
         """Return if the device is available."""
         return self._tado_zone_data.available
 
@@ -482,7 +483,7 @@ class TadoClimate(TadoZoneEntity, ClimateEntity):
         ] = self._tado_zone_data.default_overlay_termination_duration
         return state_attr
 
-    def set_swing_mode(self, swing_mode):
+    def set_swing_mode(self, swing_mode: str) -> None:
         """Set swing modes for the device."""
         self._control_hvac(swing_mode=swing_mode)
 
diff --git a/homeassistant/components/tado/sensor.py b/homeassistant/components/tado/sensor.py
index 40dcce397c6..22f4608f670 100644
--- a/homeassistant/components/tado/sensor.py
+++ b/homeassistant/components/tado/sensor.py
@@ -102,7 +102,7 @@ class TadoHomeSensor(TadoHomeEntity, SensorEntity):
         self._state_attributes = None
         self._tado_weather_data = self._tado.data["weather"]
 
-    async def async_added_to_hass(self):
+    async def async_added_to_hass(self) -> None:
         """Register for sensor updates."""
 
         self.async_on_remove(
@@ -211,7 +211,7 @@ class TadoZoneSensor(TadoZoneEntity, SensorEntity):
         self._state_attributes = None
         self._tado_zone_data = None
 
-    async def async_added_to_hass(self):
+    async def async_added_to_hass(self) -> None:
         """Register for sensor updates."""
 
         self.async_on_remove(
diff --git a/homeassistant/components/tado/water_heater.py b/homeassistant/components/tado/water_heater.py
index a009fdc3b92..3bd3ae48026 100644
--- a/homeassistant/components/tado/water_heater.py
+++ b/homeassistant/components/tado/water_heater.py
@@ -1,5 +1,6 @@
 """Support for Tado hot water zones."""
 import logging
+from typing import Any
 
 import voluptuous as vol
 
@@ -152,7 +153,7 @@ class TadoWaterHeater(TadoZoneEntity, WaterHeaterEntity):
         self._overlay_mode = CONST_MODE_SMART_SCHEDULE
         self._tado_zone_data = None
 
-    async def async_added_to_hass(self):
+    async def async_added_to_hass(self) -> None:
         """Register for sensor updates."""
 
         self.async_on_remove(
@@ -211,7 +212,7 @@ class TadoWaterHeater(TadoZoneEntity, WaterHeaterEntity):
         """Return the maximum temperature."""
         return self._max_temperature
 
-    def set_operation_mode(self, operation_mode):
+    def set_operation_mode(self, operation_mode: str) -> None:
         """Set new operation mode."""
         mode = None
 
@@ -233,7 +234,7 @@ class TadoWaterHeater(TadoZoneEntity, WaterHeaterEntity):
             hvac_mode=CONST_MODE_HEAT, target_temp=temperature, duration=time_period
         )
 
-    def set_temperature(self, **kwargs):
+    def set_temperature(self, **kwargs: Any) -> None:
         """Set new target temperature."""
         temperature = kwargs.get(ATTR_TEMPERATURE)
         if not self._supports_temperature_control or temperature is None:
diff --git a/homeassistant/components/tank_utility/sensor.py b/homeassistant/components/tank_utility/sensor.py
index 1e10eee6841..f902abc22e0 100644
--- a/homeassistant/components/tank_utility/sensor.py
+++ b/homeassistant/components/tank_utility/sensor.py
@@ -133,7 +133,7 @@ class TankUtilitySensor(SensorEntity):
         data.update(data.pop("lastReading", {}))
         return data
 
-    def update(self):
+    def update(self) -> None:
         """Set the device state and attributes."""
         data = self.get_data()
         self._state = round(data[SENSOR_TYPE], SENSOR_ROUNDING_PRECISION)
diff --git a/homeassistant/components/tapsaff/binary_sensor.py b/homeassistant/components/tapsaff/binary_sensor.py
index 9608971e78a..5ffa8690f94 100644
--- a/homeassistant/components/tapsaff/binary_sensor.py
+++ b/homeassistant/components/tapsaff/binary_sensor.py
@@ -61,7 +61,7 @@ class TapsAffSensor(BinarySensorEntity):
         """Return true if taps aff."""
         return self.data.is_taps_aff
 
-    def update(self):
+    def update(self) -> None:
         """Get the latest data."""
         self.data.update()
 
diff --git a/homeassistant/components/ted5000/sensor.py b/homeassistant/components/ted5000/sensor.py
index b62efc01f0a..e579ac6c359 100644
--- a/homeassistant/components/ted5000/sensor.py
+++ b/homeassistant/components/ted5000/sensor.py
@@ -98,7 +98,7 @@ class Ted5000Sensor(SensorEntity):
         with suppress(KeyError):
             return self._gateway.data[self._mtu][self._unit]
 
-    def update(self):
+    def update(self) -> None:
         """Get the latest data from REST API."""
         self._gateway.update()
 
diff --git a/homeassistant/components/tellduslive/switch.py b/homeassistant/components/tellduslive/switch.py
index a1bb2ffc9e1..fbecda2e775 100644
--- a/homeassistant/components/tellduslive/switch.py
+++ b/homeassistant/components/tellduslive/switch.py
@@ -1,4 +1,6 @@
 """Support for Tellstick switches using Tellstick Net."""
+from typing import Any
+
 from homeassistant.components import switch
 from homeassistant.components.switch import SwitchEntity
 from homeassistant.config_entries import ConfigEntry
@@ -37,12 +39,12 @@ class TelldusLiveSwitch(TelldusLiveEntity, SwitchEntity):
         """Return true if switch is on."""
         return self.device.is_on
 
-    def turn_on(self, **kwargs):
+    def turn_on(self, **kwargs: Any) -> None:
         """Turn the switch on."""
         self.device.turn_on()
         self._update_callback()
 
-    def turn_off(self, **kwargs):
+    def turn_off(self, **kwargs: Any) -> None:
         """Turn the switch off."""
         self.device.turn_off()
         self._update_callback()
diff --git a/homeassistant/components/tellstick/sensor.py b/homeassistant/components/tellstick/sensor.py
index e820c46da45..bfd433e1674 100644
--- a/homeassistant/components/tellstick/sensor.py
+++ b/homeassistant/components/tellstick/sensor.py
@@ -160,6 +160,6 @@ class TellstickSensor(SensorEntity):
         self._attr_native_unit_of_measurement = sensor_info.unit or None
         self._attr_name = f"{name} {sensor_info.name}"
 
-    def update(self):
+    def update(self) -> None:
         """Update tellstick sensor."""
         self._attr_native_value = self._tellcore_sensor.value(self._datatype).value
diff --git a/homeassistant/components/telnet/switch.py b/homeassistant/components/telnet/switch.py
index 9ad295d9ac5..f919834139b 100644
--- a/homeassistant/components/telnet/switch.py
+++ b/homeassistant/components/telnet/switch.py
@@ -146,14 +146,14 @@ class TelnetSwitch(SwitchEntity):
             return None
         self._attr_is_on = rendered == "True"
 
-    def turn_on(self, **kwargs) -> None:
+    def turn_on(self, **kwargs: Any) -> None:
         """Turn the device on."""
         self._telnet_command(self._command_on)
         if self.assumed_state:
             self._attr_is_on = True
             self.schedule_update_ha_state()
 
-    def turn_off(self, **kwargs) -> None:
+    def turn_off(self, **kwargs: Any) -> None:
         """Turn the device off."""
         self._telnet_command(self._command_off)
         if self.assumed_state:
diff --git a/homeassistant/components/temper/sensor.py b/homeassistant/components/temper/sensor.py
index b8d3cc38f69..606227ee7f5 100644
--- a/homeassistant/components/temper/sensor.py
+++ b/homeassistant/components/temper/sensor.py
@@ -91,7 +91,7 @@ class TemperSensor(SensorEntity):
         # set calibration data
         self.temper_device.set_calibration_data(scale=self.scale, offset=self.offset)
 
-    def update(self):
+    def update(self) -> None:
         """Retrieve latest state."""
         try:
             sensor_value = self.temper_device.get_temperature("celsius")
diff --git a/homeassistant/components/tfiac/climate.py b/homeassistant/components/tfiac/climate.py
index 58f16d1cc99..46163056948 100644
--- a/homeassistant/components/tfiac/climate.py
+++ b/homeassistant/components/tfiac/climate.py
@@ -4,6 +4,7 @@ from __future__ import annotations
 from concurrent import futures
 from datetime import timedelta
 import logging
+from typing import Any
 
 from pytfiac import Tfiac
 import voluptuous as vol
@@ -94,7 +95,7 @@ class TfiacClimate(ClimateEntity):
         """Return if the device is available."""
         return self._available
 
-    async def async_update(self):
+    async def async_update(self) -> None:
         """Update status via socket polling."""
         try:
             await self._client.update()
@@ -167,7 +168,7 @@ class TfiacClimate(ClimateEntity):
         """List of available swing modes."""
         return SUPPORT_SWING
 
-    async def async_set_temperature(self, **kwargs):
+    async def async_set_temperature(self, **kwargs: Any) -> None:
         """Set new target temperature."""
         if (temp := kwargs.get(ATTR_TEMPERATURE)) is not None:
             await self._client.set_state(TARGET_TEMP, temp)
@@ -179,18 +180,18 @@ class TfiacClimate(ClimateEntity):
         else:
             await self._client.set_state(OPERATION_MODE, HVAC_MAP[hvac_mode])
 
-    async def async_set_fan_mode(self, fan_mode):
+    async def async_set_fan_mode(self, fan_mode: str) -> None:
         """Set new fan mode."""
         await self._client.set_state(FAN_MODE, fan_mode.capitalize())
 
-    async def async_set_swing_mode(self, swing_mode):
+    async def async_set_swing_mode(self, swing_mode: str) -> None:
         """Set new swing mode."""
         await self._client.set_swing(swing_mode.capitalize())
 
-    async def async_turn_on(self):
+    async def async_turn_on(self) -> None:
         """Turn device on."""
         await self._client.set_state(OPERATION_MODE)
 
-    async def async_turn_off(self):
+    async def async_turn_off(self) -> None:
         """Turn device off."""
         await self._client.set_state(ON_MODE, "off")
diff --git a/homeassistant/components/thermoworks_smoke/sensor.py b/homeassistant/components/thermoworks_smoke/sensor.py
index 72be9a05519..2297883ec6d 100644
--- a/homeassistant/components/thermoworks_smoke/sensor.py
+++ b/homeassistant/components/thermoworks_smoke/sensor.py
@@ -127,7 +127,7 @@ class ThermoworksSmokeSensor(SensorEntity):
         else:
             self._attr_native_unit_of_measurement = self.mgr.units(self.serial, PROBE_1)
 
-    def update(self):
+    def update(self) -> None:
         """Get the monitored data from firebase."""
 
         try:
diff --git a/homeassistant/components/thethingsnetwork/sensor.py b/homeassistant/components/thethingsnetwork/sensor.py
index d6a029a3604..e14bd944d36 100644
--- a/homeassistant/components/thethingsnetwork/sensor.py
+++ b/homeassistant/components/thethingsnetwork/sensor.py
@@ -109,7 +109,7 @@ class TtnDataSensor(SensorEntity):
                 ATTR_TIME: self._state["time"],
             }
 
-    async def async_update(self):
+    async def async_update(self) -> None:
         """Get the current state."""
         await self._ttn_data_storage.async_update()
         self._state = self._ttn_data_storage.data
diff --git a/homeassistant/components/thinkingcleaner/sensor.py b/homeassistant/components/thinkingcleaner/sensor.py
index 3eadffa0a10..8b0d30d13ed 100644
--- a/homeassistant/components/thinkingcleaner/sensor.py
+++ b/homeassistant/components/thinkingcleaner/sensor.py
@@ -107,7 +107,7 @@ class ThinkingCleanerSensor(SensorEntity):
 
         self._attr_name = f"{tc_object.name} {description.name}"
 
-    def update(self):
+    def update(self) -> None:
         """Update the sensor."""
         self._update_devices()
 
diff --git a/homeassistant/components/thinkingcleaner/switch.py b/homeassistant/components/thinkingcleaner/switch.py
index 31fb9709e57..66d2ab02e93 100644
--- a/homeassistant/components/thinkingcleaner/switch.py
+++ b/homeassistant/components/thinkingcleaner/switch.py
@@ -3,6 +3,7 @@ from __future__ import annotations
 
 from datetime import timedelta
 import time
+from typing import Any
 
 from pythinkingcleaner import Discovery, ThinkingCleaner
 import voluptuous as vol
@@ -130,7 +131,7 @@ class ThinkingCleanerSwitch(SwitchEntity):
 
         return False
 
-    def turn_on(self, **kwargs):
+    def turn_on(self, **kwargs: Any) -> None:
         """Turn the device on."""
         sensor_type = self.entity_description.key
         if sensor_type == "clean":
@@ -141,13 +142,13 @@ class ThinkingCleanerSwitch(SwitchEntity):
         elif sensor_type == "find":
             self._tc_object.find_me()
 
-    def turn_off(self, **kwargs):
+    def turn_off(self, **kwargs: Any) -> None:
         """Turn the device off."""
         if self.entity_description.key == "clean":
             self.set_graceful_lock(False)
             self._tc_object.stop_cleaning()
 
-    def update(self):
+    def update(self) -> None:
         """Update the switch state (Only for clean)."""
         if self.entity_description.key == "clean" and not self.is_update_locked():
             self._tc_object.update()
diff --git a/homeassistant/components/tibber/sensor.py b/homeassistant/components/tibber/sensor.py
index 9cfc4ecbb5a..ca0c253590f 100644
--- a/homeassistant/components/tibber/sensor.py
+++ b/homeassistant/components/tibber/sensor.py
@@ -350,7 +350,7 @@ class TibberSensorElPrice(TibberSensor):
 
         self._device_name = self._home_name
 
-    async def async_update(self):
+    async def async_update(self) -> None:
         """Get the latest data and updates the states."""
         now = dt_util.now()
         if (
@@ -448,7 +448,7 @@ class TibberSensorRT(TibberSensor, CoordinatorEntity["TibberRtDataCoordinator"])
             self._attr_native_unit_of_measurement = tibber_home.currency
 
     @property
-    def available(self):
+    def available(self) -> bool:
         """Return True if entity is available."""
         return self._tibber_home.rt_subscription_running
 
diff --git a/homeassistant/components/tmb/sensor.py b/homeassistant/components/tmb/sensor.py
index dafcf909399..8d6db00b2b9 100644
--- a/homeassistant/components/tmb/sensor.py
+++ b/homeassistant/components/tmb/sensor.py
@@ -119,7 +119,7 @@ class TMBSensor(SensorEntity):
         }
 
     @Throttle(MIN_TIME_BETWEEN_UPDATES)
-    def update(self):
+    def update(self) -> None:
         """Get the next bus information."""
         try:
             self._state = self._ibus_client.get_stop_forecast(self._stop, self._line)
diff --git a/homeassistant/components/tod/binary_sensor.py b/homeassistant/components/tod/binary_sensor.py
index d287431d712..1c909388b60 100644
--- a/homeassistant/components/tod/binary_sensor.py
+++ b/homeassistant/components/tod/binary_sensor.py
@@ -225,7 +225,7 @@ class TodSensor(BinarySensorEntity):
             # Offset is already there
             self._time_before += timedelta(days=1)
 
-    async def async_added_to_hass(self):
+    async def async_added_to_hass(self) -> None:
         """Call when entity about to be added to Home Assistant."""
         self._calculate_boundary_time()
         self._calculate_next_update()
diff --git a/homeassistant/components/todoist/calendar.py b/homeassistant/components/todoist/calendar.py
index f1240f33b1b..30391f90d03 100644
--- a/homeassistant/components/todoist/calendar.py
+++ b/homeassistant/components/todoist/calendar.py
@@ -308,7 +308,7 @@ class TodoistProjectEntity(CalendarEntity):
         """Return the name of the entity."""
         return self._name
 
-    def update(self):
+    def update(self) -> None:
         """Update all Todoist Calendars."""
         self.data.update()
         # Set Todoist-specific data that can't easily be grabbed
diff --git a/homeassistant/components/toon/climate.py b/homeassistant/components/toon/climate.py
index 07e0aed66ac..2d7cf4c04f6 100644
--- a/homeassistant/components/toon/climate.py
+++ b/homeassistant/components/toon/climate.py
@@ -103,7 +103,7 @@ class ToonThermostatDevice(ToonDisplayDeviceEntity, ClimateEntity):
         return {"heating_type": self.coordinator.data.agreement.heating_type}
 
     @toon_exception_handler
-    async def async_set_temperature(self, **kwargs) -> None:
+    async def async_set_temperature(self, **kwargs: Any) -> None:
         """Change the setpoint of the thermostat."""
         temperature = kwargs.get(ATTR_TEMPERATURE)
         await self.coordinator.toon.set_current_setpoint(temperature)
diff --git a/homeassistant/components/totalconnect/binary_sensor.py b/homeassistant/components/totalconnect/binary_sensor.py
index e86b54272a0..32e0b3573f5 100644
--- a/homeassistant/components/totalconnect/binary_sensor.py
+++ b/homeassistant/components/totalconnect/binary_sensor.py
@@ -49,7 +49,7 @@ class TotalConnectBinarySensor(BinarySensorEntity):
         """Return the name of the device."""
         return self._name
 
-    def update(self):
+    def update(self) -> None:
         """Return the state of the device."""
         self._is_tampered = self._zone.is_tampered()
         self._is_low_battery = self._zone.is_low_battery()
diff --git a/homeassistant/components/touchline/climate.py b/homeassistant/components/touchline/climate.py
index 78fd00b734c..bd7bdce4efe 100644
--- a/homeassistant/components/touchline/climate.py
+++ b/homeassistant/components/touchline/climate.py
@@ -1,7 +1,7 @@
 """Platform for Roth Touchline floor heating controller."""
 from __future__ import annotations
 
-from typing import NamedTuple
+from typing import Any, NamedTuple
 
 from pytouchline import PyTouchline
 import voluptuous as vol
@@ -75,7 +75,7 @@ class Touchline(ClimateEntity):
         self._current_operation_mode = None
         self._preset_mode = None
 
-    def update(self):
+    def update(self) -> None:
         """Update thermostat attributes."""
         self.unit.update()
         self._name = self.unit.get_name()
@@ -120,7 +120,7 @@ class Touchline(ClimateEntity):
         """Set new target hvac mode."""
         self._current_operation_mode = HVACMode.HEAT
 
-    def set_temperature(self, **kwargs):
+    def set_temperature(self, **kwargs: Any) -> None:
         """Set new target temperature."""
         if kwargs.get(ATTR_TEMPERATURE) is not None:
             self._target_temperature = kwargs.get(ATTR_TEMPERATURE)
diff --git a/homeassistant/components/traccar/device_tracker.py b/homeassistant/components/traccar/device_tracker.py
index 784e3c70f33..b668d2fff33 100644
--- a/homeassistant/components/traccar/device_tracker.py
+++ b/homeassistant/components/traccar/device_tracker.py
@@ -411,7 +411,7 @@ class TraccarEntity(TrackerEntity, RestoreEntity):
         """Return the source type, eg gps or router, of the device."""
         return SourceType.GPS
 
-    async def async_added_to_hass(self):
+    async def async_added_to_hass(self) -> None:
         """Register state update callback."""
         await super().async_added_to_hass()
         self._unsub_dispatcher = async_dispatcher_connect(
@@ -445,7 +445,7 @@ class TraccarEntity(TrackerEntity, RestoreEntity):
         }
         self._battery = attr.get(ATTR_BATTERY)
 
-    async def async_will_remove_from_hass(self):
+    async def async_will_remove_from_hass(self) -> None:
         """Clean up after entity before removal."""
         await super().async_will_remove_from_hass()
         self._unsub_dispatcher()
diff --git a/homeassistant/components/transmission/sensor.py b/homeassistant/components/transmission/sensor.py
index c3f160cb040..0472ce221fb 100644
--- a/homeassistant/components/transmission/sensor.py
+++ b/homeassistant/components/transmission/sensor.py
@@ -75,11 +75,11 @@ class TransmissionSensor(SensorEntity):
         return self._state
 
     @property
-    def available(self):
+    def available(self) -> bool:
         """Could the device be accessed during the last update call."""
         return self._tm_client.api.available
 
-    async def async_added_to_hass(self):
+    async def async_added_to_hass(self) -> None:
         """Handle entity which will be added."""
 
         @callback
@@ -102,7 +102,7 @@ class TransmissionSpeedSensor(TransmissionSensor):
         """Return the unit of measurement of this entity, if any."""
         return DATA_RATE_MEGABYTES_PER_SECOND
 
-    def update(self):
+    def update(self) -> None:
         """Get the latest data from Transmission and updates the state."""
         if data := self._tm_client.api.data:
             mb_spd = (
@@ -117,7 +117,7 @@ class TransmissionSpeedSensor(TransmissionSensor):
 class TransmissionStatusSensor(TransmissionSensor):
     """Representation of a Transmission status sensor."""
 
-    def update(self):
+    def update(self) -> None:
         """Get the latest data from Transmission and updates the state."""
         if data := self._tm_client.api.data:
             upload = data.uploadSpeed
@@ -163,7 +163,7 @@ class TransmissionTorrentsSensor(TransmissionSensor):
             STATE_ATTR_TORRENT_INFO: info,
         }
 
-    def update(self):
+    def update(self) -> None:
         """Get the latest data from Transmission and updates the state."""
         torrents = _filter_torrents(
             self._tm_client.api.torrents, statuses=self.SUBTYPE_MODES[self._sub_type]
diff --git a/homeassistant/components/transmission/switch.py b/homeassistant/components/transmission/switch.py
index 63477eecf48..0fd9ffee51e 100644
--- a/homeassistant/components/transmission/switch.py
+++ b/homeassistant/components/transmission/switch.py
@@ -1,5 +1,6 @@
 """Support for setting the Transmission BitTorrent client Turtle Mode."""
 import logging
+from typing import Any
 
 from homeassistant.components.switch import SwitchEntity
 from homeassistant.config_entries import ConfigEntry
@@ -61,11 +62,11 @@ class TransmissionSwitch(SwitchEntity):
         return self._state == STATE_ON
 
     @property
-    def available(self):
+    def available(self) -> bool:
         """Could the device be accessed during the last update call."""
         return self._tm_client.api.available
 
-    def turn_on(self, **kwargs):
+    def turn_on(self, **kwargs: Any) -> None:
         """Turn the device on."""
         if self.type == "on_off":
             _LOGGING.debug("Starting all torrents")
@@ -75,7 +76,7 @@ class TransmissionSwitch(SwitchEntity):
             self._tm_client.api.set_alt_speed_enabled(True)
         self._tm_client.api.update()
 
-    def turn_off(self, **kwargs):
+    def turn_off(self, **kwargs: Any) -> None:
         """Turn the device off."""
         if self.type == "on_off":
             _LOGGING.debug("Stopping all torrents")
@@ -85,7 +86,7 @@ class TransmissionSwitch(SwitchEntity):
             self._tm_client.api.set_alt_speed_enabled(False)
         self._tm_client.api.update()
 
-    async def async_added_to_hass(self):
+    async def async_added_to_hass(self) -> None:
         """Handle entity which will be added."""
         self.unsub_update = async_dispatcher_connect(
             self.hass,
@@ -103,7 +104,7 @@ class TransmissionSwitch(SwitchEntity):
             self.unsub_update()
             self.unsub_update = None
 
-    def update(self):
+    def update(self) -> None:
         """Get the latest data from Transmission and updates the state."""
         active = None
         if self.type == "on_off":
diff --git a/homeassistant/components/transport_nsw/sensor.py b/homeassistant/components/transport_nsw/sensor.py
index 54d555bacb7..27fd6fd67fd 100644
--- a/homeassistant/components/transport_nsw/sensor.py
+++ b/homeassistant/components/transport_nsw/sensor.py
@@ -120,7 +120,7 @@ class TransportNSWSensor(SensorEntity):
         """Icon to use in the frontend, if any."""
         return self._icon
 
-    def update(self):
+    def update(self) -> None:
         """Get the latest data from Transport NSW and update the states."""
         self.data.update()
         self._times = self.data.info
diff --git a/homeassistant/components/travisci/sensor.py b/homeassistant/components/travisci/sensor.py
index 7b15f5c0dc8..c35391d4573 100644
--- a/homeassistant/components/travisci/sensor.py
+++ b/homeassistant/components/travisci/sensor.py
@@ -174,7 +174,7 @@ class TravisCISensor(SensorEntity):
 
         return attrs
 
-    def update(self):
+    def update(self) -> None:
         """Get the latest data and updates the states."""
         _LOGGER.debug("Updating sensor %s", self.name)
 
diff --git a/homeassistant/components/trend/binary_sensor.py b/homeassistant/components/trend/binary_sensor.py
index e3bd4816f44..b98d904cabd 100644
--- a/homeassistant/components/trend/binary_sensor.py
+++ b/homeassistant/components/trend/binary_sensor.py
@@ -169,7 +169,7 @@ class SensorTrend(BinarySensorEntity):
             ATTR_SAMPLE_DURATION: self._sample_duration,
         }
 
-    async def async_added_to_hass(self):
+    async def async_added_to_hass(self) -> None:
         """Complete device setup after being added to hass."""
 
         @callback
@@ -195,7 +195,7 @@ class SensorTrend(BinarySensorEntity):
             )
         )
 
-    async def async_update(self):
+    async def async_update(self) -> None:
         """Get the latest data and update the states."""
         # Remove outdated samples
         if self._sample_duration > 0: