diff --git a/homeassistant/components/co2signal/sensor.py b/homeassistant/components/co2signal/sensor.py
index e9cfdb87983..cb2ff40c062 100644
--- a/homeassistant/components/co2signal/sensor.py
+++ b/homeassistant/components/co2signal/sensor.py
@@ -47,10 +47,7 @@ def setup_platform(hass, config, add_entities, discovery_info=None):
 
     _LOGGER.debug("Setting up the sensor using the %s", country_code)
 
-    devs = []
-
-    devs.append(CO2Sensor(token, country_code, lat, lon))
-    add_entities(devs, True)
+    add_entities([CO2Sensor(token, country_code, lat, lon)], True)
 
 
 class CO2Sensor(SensorEntity):
@@ -65,42 +62,27 @@ class CO2Sensor(SensorEntity):
         self._country_code = country_code
         self._latitude = lat
         self._longitude = lon
-        self._data = None
 
         if country_code is not None:
             device_name = country_code
         else:
             device_name = f"{round(self._latitude, 2)}/{round(self._longitude, 2)}"
 
-        self._friendly_name = f"CO2 intensity - {device_name}"
-
-    @property
-    def name(self):
-        """Return the name of the sensor."""
-        return self._friendly_name
-
-    @property
-    def state(self):
-        """Return the state of the device."""
-        return self._data
-
-    @property
-    def extra_state_attributes(self):
-        """Return the state attributes of the last update."""
-        return {ATTR_ATTRIBUTION: ATTRIBUTION}
+        self._attr_name = f"CO2 intensity - {device_name}"
+        self._attr_extra_state_attributes = {ATTR_ATTRIBUTION: ATTRIBUTION}
 
     def update(self):
         """Get the latest data and updates the states."""
 
-        _LOGGER.debug("Update data for %s", self._friendly_name)
+        _LOGGER.debug("Update data for %s", self.name)
 
         if self._country_code is not None:
-            self._data = CO2Signal.get_latest_carbon_intensity(
+            data = CO2Signal.get_latest_carbon_intensity(
                 self._token, country_code=self._country_code
             )
         else:
-            self._data = CO2Signal.get_latest_carbon_intensity(
+            data = CO2Signal.get_latest_carbon_intensity(
                 self._token, latitude=self._latitude, longitude=self._longitude
             )
 
-        self._data = round(self._data, 2)
+        self._attr_state = round(data, 2)