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请教 关于半双工485 收发切换的问题



我在收发切换的时候都加了延时,不过到现场有时就不灵了,比如改变了波特率,或者线长了点。

后来看到用硬件可以解决 请教各位大哥 这个问题你们都是怎么解决的?