Com Ports Issue

[cookibooki]

Hello
I have several USB connected printers to my PC. I want to add them to my device list but when I choose to connect to the COM 4 /for example/ the program always trying to connect to the COM3 /which is the first in my list, and which is already added/. See attached

[S3D-Jason]

Most of our customers typically only have 1 or 2 COM ports listed. Is it possible you have many different machines connected to the computer at once? If you're having trouble connecting to a specific one, you could try disconnecting the others so that it's easier to identify and connect to the desired one in the software.

[cookibooki]

Hello
I have 4 printers connected to PC via usb port using same driver. I can't work with them in the same time. This problem was not exist in the previous version.

[S3D-Jason]

Just to check, if you disconnect all of the printers except for 1, does it connect and work as expected? I want to make sure that works first before I offer other ideas.

[cookibooki]

Yes, if i connect one printer a time no problem. The problem exist when I connect all printers. I have to point that one of the printers use different driver /Microsoft, USB Serial Device/. It connects every time. All the other printers use another same driver /wch.cn, USB-SERIAL CH340/. Only one of them can connect /connected to the lower com port/.