Add devolo remote devices as binary sensors (#39105)

homeassistant/components/devolo_home_control/binary_sensor.py

@@ -41,7 +41,20 @@ async def async_setup_entry(
                     element_uid=binary_sensor,
                 )
             )
-
+    for device in hass.data[DOMAIN]["homecontrol"].devices.values():
+        if hasattr(device, "remote_control_property"):
+            for remote in device.remote_control_property:
+                for index in range(
+                    1, device.remote_control_property[remote].key_count + 1
+                ):
+                    entities.append(
+                        DevoloRemoteControl(
+                            homecontrol=hass.data[DOMAIN]["homecontrol"],
+                            device_instance=device,
+                            element_uid=remote,
+                            key=index,
+                        )
+                    )
     async_add_entities(entities, False)
 
 
@@ -97,3 +110,48 @@ class DevoloBinaryDeviceEntity(DevoloDeviceEntity, BinarySensorEntity):
         else:
             _LOGGER.debug("No valid message received: %s", message)
         self.schedule_update_ha_state()
+
+
+class DevoloRemoteControl(DevoloDeviceEntity, BinarySensorEntity):
+    """Representation of a remote control within devolo Home Control."""
+
+    def __init__(self, homecontrol, device_instance, element_uid, key):
+        """Initialize a devolo remote control."""
+        self._remote_control_property = device_instance.remote_control_property.get(
+            element_uid
+        )
+        super().__init__(
+            homecontrol=homecontrol,
+            device_instance=device_instance,
+            element_uid=f"{element_uid}_{key}",
+            name=device_instance.item_name,
+            sync=self._sync,
+        )
+
+        self._key = key
+
+        self._state = False
+
+        self._subscriber = None
+
+    @property
+    def is_on(self):
+        """Return the state."""
+        return self._state
+
+    def _sync(self, message=None):
+        """Update the binary sensor state."""
+        if (
+            message[0] == self._remote_control_property.element_uid
+            and message[1] == self._key
+        ):
+            self._state = True
+        elif (
+            message[0] == self._remote_control_property.element_uid and message[1] == 0
+        ):
+            self._state = False
+        elif message[0].startswith("hdm"):
+            self._available = self._device_instance.is_online()
+        else:
+            _LOGGER.debug("No valid message received: %s", message)
+        self.schedule_update_ha_state()