def get_time(self):
        """
        :return: the machine's time
        """
        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")
:return: the machine's time