Windows – Can’t find COM ports in Device Manager (Windows 10)

I'm not at work so I don't have any hardware in front of me, but the FTDI application note AN_107 - Advanced Driver Options looks to have some promising options.

In particular, I think the "Ignore Hardware Serial Number" (section 7.1, page 20) option would do what you want.

7.1 Ignore Hardware Serial Number

If devices have the same vendor ID and product ID but different serial numbers, the system will normally treat them as different devices. This causes the drivers to be installed for each device and create registry entries for each device.

It is possible to override this behaviour to make the system ignore a device's serial number and treat all devices with matching VID and PID connected to the same USB port as if they were the same device. This is achieved by adding a REG_BINARY value called IgnoreHWSerNum to the registry and setting it to 01.

The AN_123 How COM Ports Are Allocated On Driver Installation app note is also very informative.

OT, devices these days are getting so complex that most of the documentation is being moved out of the datasheet and into App Notes. Don't forget to always read the app notes!

Try USBDeview to get the vendor ID, then look it up on a vendor list here or here

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Or use Device manager to find the vendor ID

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There is also a utility called chip genius referred to on this page .