子设备指令
子设备上线（0x41）：
可通过此指令上线子设备。
mcu发送：
| 字段 | 长度 | 说明 |
|---|---|---|
| 帧头 | 1 | 0xa5 |
| 版本 | 1 | 0x02 |
| 命令 | 1 | 0x41 |
| 长度 | 2 | 0x003B |
| 序列号 | 4 | 大端法自增数字，本条数据的序列号。如果需要确定子 设备何时上线成功，可记录此发送序列号，与收到的进行对比 |
| 子设备id | 16 | 自定义的子设备id，仅限字母数字组合 |
| 子设备名称 | 32 | 子设备名称，中文(utf-8),字母,数字组合 |
| 子设备版本 | 5 | 子设备固件版本，"xx.xx"，0≤x≤9 |
| 子设备类型 | 2 | 子设备类型，请与APP端自行约定 |
| 校验 | 1 | 校验和 |
子设备下线（0x42）：
可通过此指令执行子设备下线操作。
mcu发送：
| 字段 | 长度 | 说明 |
|---|---|---|
| 帧头 | 1 | 0xa5 |
| 版本 | 1 | 0x02 |
| 命令 | 1 | 0x42 |
| 长度 | 2 | 0X0014 |
| 序列号 | 4 | 大端法自增数字，本条数据的序列号。如果需要确定子 设备何时下线成功，可记录此发送序列号，与收到的进行对比 |
| 子设备id | 16 | 自定义的子设备id，仅限字母数字组合 |
| 校验 | 1 | 校验和 |
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