This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
串口调试软件显示通信端口无法打开?我试了每个端口,都不行,不知道是怎么回事?
说明你外部连接的串口设备有问题,或者USB口坏了
你现在任务管理器中看看 有没有识别到串口
如果识别了 才有对应的COM号 这样串口助手才能打卡