diff --git a/homeassistant/components/smarty/binary_sensor.py b/homeassistant/components/smarty/binary_sensor.py
index 965102f07f7..90944c04d8b 100644
--- a/homeassistant/components/smarty/binary_sensor.py
+++ b/homeassistant/components/smarty/binary_sensor.py
@@ -3,7 +3,7 @@
 import logging
 
 from homeassistant.components.binary_sensor import (
-    DEVICE_CLASS_PROBLEM,
+    BinarySensorDeviceClass,
     BinarySensorEntity,
 )
 from homeassistant.core import callback
@@ -31,33 +31,14 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
 class SmartyBinarySensor(BinarySensorEntity):
     """Representation of a Smarty Binary Sensor."""
 
+    _attr_should_poll = False
+
     def __init__(self, name, device_class, smarty):
         """Initialize the entity."""
-        self._name = name
-        self._state = None
-        self._sensor_type = device_class
+        self._attr_name = name
+        self._attr_device_class = device_class
         self._smarty = smarty
 
-    @property
-    def device_class(self):
-        """Return the class of the sensor."""
-        return self._sensor_type
-
-    @property
-    def should_poll(self) -> bool:
-        """Do not poll."""
-        return False
-
-    @property
-    def name(self):
-        """Return the name of the sensor."""
-        return self._name
-
-    @property
-    def is_on(self):
-        """Return true if the binary sensor is on."""
-        return self._state
-
     async def async_added_to_hass(self):
         """Call to update."""
         async_dispatcher_connect(self.hass, SIGNAL_UPDATE_SMARTY, self._update_callback)
@@ -77,8 +58,8 @@ class BoostSensor(SmartyBinarySensor):
 
     def update(self) -> None:
         """Update state."""
-        _LOGGER.debug("Updating sensor %s", self._name)
-        self._state = self._smarty.boost
+        _LOGGER.debug("Updating sensor %s", self._attr_name)
+        self._attr_is_on = self._smarty.boost
 
 
 class AlarmSensor(SmartyBinarySensor):
@@ -87,13 +68,15 @@ class AlarmSensor(SmartyBinarySensor):
     def __init__(self, name, smarty):
         """Alarm Sensor Init."""
         super().__init__(
-            name=f"{name} Alarm", device_class=DEVICE_CLASS_PROBLEM, smarty=smarty
+            name=f"{name} Alarm",
+            device_class=BinarySensorDeviceClass.PROBLEM,
+            smarty=smarty,
         )
 
     def update(self) -> None:
         """Update state."""
-        _LOGGER.debug("Updating sensor %s", self._name)
-        self._state = self._smarty.alarm
+        _LOGGER.debug("Updating sensor %s", self._attr_name)
+        self._attr_is_on = self._smarty.alarm
 
 
 class WarningSensor(SmartyBinarySensor):
@@ -102,10 +85,12 @@ class WarningSensor(SmartyBinarySensor):
     def __init__(self, name, smarty):
         """Warning Sensor Init."""
         super().__init__(
-            name=f"{name} Warning", device_class=DEVICE_CLASS_PROBLEM, smarty=smarty
+            name=f"{name} Warning",
+            device_class=BinarySensorDeviceClass.PROBLEM,
+            smarty=smarty,
         )
 
     def update(self) -> None:
         """Update state."""
-        _LOGGER.debug("Updating sensor %s", self._name)
-        self._state = self._smarty.warning
+        _LOGGER.debug("Updating sensor %s", self._attr_name)
+        self._attr_is_on = self._smarty.warning
diff --git a/homeassistant/components/smarty/sensor.py b/homeassistant/components/smarty/sensor.py
index 44a8392991a..9266698ed58 100644
--- a/homeassistant/components/smarty/sensor.py
+++ b/homeassistant/components/smarty/sensor.py
@@ -4,12 +4,8 @@ from __future__ import annotations
 import datetime as dt
 import logging
 
-from homeassistant.components.sensor import SensorEntity
-from homeassistant.const import (
-    DEVICE_CLASS_TEMPERATURE,
-    DEVICE_CLASS_TIMESTAMP,
-    TEMP_CELSIUS,
-)
+from homeassistant.components.sensor import SensorDeviceClass, SensorEntity
+from homeassistant.const import TEMP_CELSIUS
 from homeassistant.core import callback
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 import homeassistant.util.dt as dt_util
@@ -39,41 +35,18 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
 class SmartySensor(SensorEntity):
     """Representation of a Smarty Sensor."""
 
+    _attr_should_poll = False
+
     def __init__(
         self, name: str, device_class: str, smarty, unit_of_measurement: str = ""
     ):
         """Initialize the entity."""
-        self._name = name
-        self._state: dt.datetime | None = None
-        self._sensor_type = device_class
-        self._unit_of_measurement = unit_of_measurement
+        self._attr_name = name
+        self._attr_native_value = None
+        self._attr_device_class = device_class
+        self._attr_native_unit_of_measurement = unit_of_measurement
         self._smarty = smarty
 
-    @property
-    def should_poll(self) -> bool:
-        """Do not poll."""
-        return False
-
-    @property
-    def device_class(self):
-        """Return the device class of the sensor."""
-        return self._sensor_type
-
-    @property
-    def name(self):
-        """Return the name of the sensor."""
-        return self._name
-
-    @property
-    def native_value(self):
-        """Return the state of the sensor."""
-        return self._state
-
-    @property
-    def native_unit_of_measurement(self):
-        """Return the unit this state is expressed in."""
-        return self._unit_of_measurement
-
     async def async_added_to_hass(self):
         """Call to update."""
         async_dispatcher_connect(self.hass, SIGNAL_UPDATE_SMARTY, self._update_callback)
@@ -91,15 +64,15 @@ class SupplyAirTemperatureSensor(SmartySensor):
         """Supply Air Temperature Init."""
         super().__init__(
             name=f"{name} Supply Air Temperature",
-            device_class=DEVICE_CLASS_TEMPERATURE,
+            device_class=SensorDeviceClass.TEMPERATURE,
             unit_of_measurement=TEMP_CELSIUS,
             smarty=smarty,
         )
 
     def update(self) -> None:
         """Update state."""
-        _LOGGER.debug("Updating sensor %s", self._name)
-        self._state = self._smarty.supply_air_temperature
+        _LOGGER.debug("Updating sensor %s", self._attr_name)
+        self._attr_native_value = self._smarty.supply_air_temperature
 
 
 class ExtractAirTemperatureSensor(SmartySensor):
@@ -109,15 +82,15 @@ class ExtractAirTemperatureSensor(SmartySensor):
         """Supply Air Temperature Init."""
         super().__init__(
             name=f"{name} Extract Air Temperature",
-            device_class=DEVICE_CLASS_TEMPERATURE,
+            device_class=SensorDeviceClass.TEMPERATURE,
             unit_of_measurement=TEMP_CELSIUS,
             smarty=smarty,
         )
 
     def update(self) -> None:
         """Update state."""
-        _LOGGER.debug("Updating sensor %s", self._name)
-        self._state = self._smarty.extract_air_temperature
+        _LOGGER.debug("Updating sensor %s", self._attr_name)
+        self._attr_native_value = self._smarty.extract_air_temperature
 
 
 class OutdoorAirTemperatureSensor(SmartySensor):
@@ -127,15 +100,15 @@ class OutdoorAirTemperatureSensor(SmartySensor):
         """Outdoor Air Temperature Init."""
         super().__init__(
             name=f"{name} Outdoor Air Temperature",
-            device_class=DEVICE_CLASS_TEMPERATURE,
+            device_class=SensorDeviceClass.TEMPERATURE,
             unit_of_measurement=TEMP_CELSIUS,
             smarty=smarty,
         )
 
     def update(self) -> None:
         """Update state."""
-        _LOGGER.debug("Updating sensor %s", self._name)
-        self._state = self._smarty.outdoor_air_temperature
+        _LOGGER.debug("Updating sensor %s", self._attr_name)
+        self._attr_native_value = self._smarty.outdoor_air_temperature
 
 
 class SupplyFanSpeedSensor(SmartySensor):
@@ -152,8 +125,8 @@ class SupplyFanSpeedSensor(SmartySensor):
 
     def update(self) -> None:
         """Update state."""
-        _LOGGER.debug("Updating sensor %s", self._name)
-        self._state = self._smarty.supply_fan_speed
+        _LOGGER.debug("Updating sensor %s", self._attr_name)
+        self._attr_native_value = self._smarty.supply_fan_speed
 
 
 class ExtractFanSpeedSensor(SmartySensor):
@@ -170,8 +143,8 @@ class ExtractFanSpeedSensor(SmartySensor):
 
     def update(self) -> None:
         """Update state."""
-        _LOGGER.debug("Updating sensor %s", self._name)
-        self._state = self._smarty.extract_fan_speed
+        _LOGGER.debug("Updating sensor %s", self._attr_name)
+        self._attr_native_value = self._smarty.extract_fan_speed
 
 
 class FilterDaysLeftSensor(SmartySensor):
@@ -181,7 +154,7 @@ class FilterDaysLeftSensor(SmartySensor):
         """Filter Days Left Init."""
         super().__init__(
             name=f"{name} Filter Days Left",
-            device_class=DEVICE_CLASS_TIMESTAMP,
+            device_class=SensorDeviceClass.TIMESTAMP,
             unit_of_measurement=None,
             smarty=smarty,
         )
@@ -189,8 +162,8 @@ class FilterDaysLeftSensor(SmartySensor):
 
     def update(self) -> None:
         """Update state."""
-        _LOGGER.debug("Updating sensor %s", self._name)
+        _LOGGER.debug("Updating sensor %s", self._attr_name)
         days_left = self._smarty.filter_timer
         if days_left is not None and days_left != self._days_left:
-            self._state = dt_util.now() + dt.timedelta(days=days_left)
+            self._attr_native_value = dt_util.now() + dt.timedelta(days=days_left)
             self._days_left = days_left