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我的代码写完之后传输的数据不管是%d还是%x最后在另一端检测出来的结果都变成了字符串，而我现在需要用openmv输出的数据来模拟信号，所以我该怎么改？（信号是以十六进制在电脑中检测出来的）
%d,%x就是字符串的格式化。
https://forum.singtown.com/topic/327/如何用串口发送数字-二进制-16进制/8
