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@kidswong999 感谢感谢
就是除了USB转TTL模块以外,想知道串口是否接收程序,是不是就要用扩展板
发送数据到串口,然后要查看串口是否接收到数据是不是要通过串口助手看?教程说要通过调试扩展板看串口接收的数据,那是不是需要一个调试扩展板?