code: def get_device_name(self):
          
          command = const.CMD_OPTIONS_RRQ
          command_string = b'~DeviceName\x00'
          response_size = 1024
  
          cmd_response = self.__send_command(command, command_string, response_size)
          if cmd_response.get('status'):
              device = self.__data.split(b'=', 1)[-1].split(b'\x00')[0]
              return device.decode()
          else:
              return ""
docs: return the device name
  
          :return: str