Update to sense component to fully be async (#21698)

* Update to sense component to fully be async

* Shortened lines

* Whitespace

homeassistant/components/sense/binary_sensor.py

@@ -49,17 +49,15 @@ MDI_ICONS = {
 }
 
 
-def setup_platform(hass, config, add_entities, discovery_info=None):
+async def async_setup_platform(hass, config, async_add_entities,
+                               discovery_info=None):
     """Set up the Sense binary sensor."""
-    if discovery_info is None:
-        return
-
     data = hass.data[SENSE_DATA]
 
-    sense_devices = data.get_discovered_device_data()
+    sense_devices = await data.get_discovered_device_data()
     devices = [SenseDevice(data, device) for device in sense_devices
                if device['tags']['DeviceListAllowed'] == 'true']
-    add_entities(devices)
+    async_add_entities(devices)
 
 
 def sense_to_mdi(sense_icon):
@@ -103,11 +101,11 @@ class SenseDevice(BinarySensorDevice):
         """Return the device class of the binary sensor."""
         return BIN_SENSOR_CLASS
 
-    def update(self):
+    async def async_update(self):
         """Retrieve latest state."""
         from sense_energy.sense_api import SenseAPITimeoutException
         try:
-            self._data.get_realtime()
+            await self._data.update_realtime()
         except SenseAPITimeoutException:
             _LOGGER.error("Timeout retrieving data")
             return