Change USB relay COMport number

 

 

Connect USB relay (or FTDI device), after drivers installation go to Device Manager

 

Open USB Serial Port (in example COM15) Properties

 

Click on Port Settings > Advanced...

 

Change in COM Port Number in example from COM15 to COM3 and click OK

 

Now any time when this USB relay is connected to this PC will use COM3

 

 

 

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