Problem with serial communication
C / C++ / MFC
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Hello Im using serial communicating (COM3 and COM4) to talk with another server. I use the exact same settings and the same class (overlapped io with readfile/writefile) to communicate with the server (diffrent protocols). Everything runs smoothly on COM3, but the overlapped read doesn’t complete for COM4 (as nothing is received). If I connect to COM4 using hyper terminal everything works (both send and receive). What can be wrong? Thanks, Jonas