code: def get_time(self):
          
          command = const.CMD_GET_TIME
          response_size = 1032
          cmd_response = self.__send_command(command, b'', response_size)
          if cmd_response.get('status'):
              return self.__decode_time(self.__data[:4])
          else:
              raise ZKErrorResponse("can't get time")
docs: :return: the machine's time