4 首先要设定通信协议，一般以帧格式 1、起始字节 2、数据长度 3~n、数据区其次，vb发了一串

Title: 4

Description: 首先要设定通信协议，一般以帧格式 1、起始字节 2、数据长度 3~n、数据区其次，vb发了一串数据当单片机每收到一个数据时：第一步：判断是不是起始字节，如果是到第二步，否则继续第一步第二步：收到数据长度第三步：根据数据长度循环收数据，直到结束。

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