async def async_added_to_hass(self) -> None:
        """Register callbacks and load initial data."""
        self._unregister_callbacks.append(
            self._data_point.register_data_point_updated_callback(
                cb=self._async_entity_changed, custom_id=self.entity_id
            )
        )
        self._unregister_callbacks.append(
            self._data_point.register_device_removed_callback(cb=self._async_device_removed)
        )
Register callbacks and load initial data.
custom_components/homematicip_local/update.py