Raspberry usb port research

Hello Everyone,
I installed Debian on my raspberry 3 B+, I also installed putty in order to monitor a digital power supply via Serial access, the matter is that I do not know how to check in which port my power supply is connected with my raspberry boar via my usb cable.

Do you have any Idea how I can found it?

Thanks in advance!

Hi,
Sorry for the late response. If you are using a windows device, search for the device manger. In the device manager look for COM ports. Find the COM port for your serial device.

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If your comport is COM4, just type in COM4 in the Serial line. It will work.