Sheet 1
协议包解析
  消息提醒类
    消息提醒
      app -> mcu
        0x 02 00 00
      mcu -> app
        0x 12 00 00
    拒接来电
      app -> mcu
        0x 03 01 00
          收到拒接来电命令
          android
        0x 03 03 00
          收到拒接来电命令
          ios
      mcu -> app
        0x 13 01 00
          拒接来电
    消息提醒
      app -> mcu
        0x 04 00 00
      mcu -> app
        0x 12 00 00
    消息提醒
      app -> mcu
        0x 02 00 00
      mcu -> app
        0x 12 00 00
    消息提醒
      app -> mcu
        0x 02 00 00
      mcu -> app
        0x 12 00 00