code: def start(self) -> None:
          
          if self.config:
              self.websocket = self.ws_client(
                  self.loop, self.session, self.host,
                  self.config.websocketport, self.async_session_handler)
              self.websocket.start()
          else:
              _LOGGER.error('No deCONZ config available')
docs: Connect websocket to deCONZ.