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银
@jack_admin 抱歉，我发现可能是我自己的问题，我按照这个帖子提到的内容：https://www.cool-pi.com/topic/69/coolpi-4b硬件扩展二-serial-port?_=1686637427786 将ttys0改为普通串口，用stty工具测试S0和S2都没有发现任何问题，我比较怀疑可能是minicom的一些问题。
J
@银河铁道 多谢！近期我们了解下