Issue with DFU-RT Port after modifying PID/VID on UNO R4 Minima

Hardware UNO R4 UNO R4 Minima
1

Hello everyone,

I’m currently working on a project using an Arduino UNO R4 Minima. So far, everything has been working perfectly: my program uploads successfully, and all features are functional.

However, I now want to make my project more "authentic" by modifying the PID/VID to custom values. I changed the PID/VID in the pins_arduino.h file to the desired ones. After uploading my program, the board appears correctly in Windows COM ports with the new PID/VID, so that part seems fine.

The issue is that the board also shows up as "DFU-RT Port" in the device manager, and Windows reports that the drivers are missing for this device (Code 28).
Additionally, after this modification:

  • The board suddenly disappears from the list of ejectable devices in the taskbar.
  • When I try to upload a new program, the Arduino IDE throws the following error: "No DFU capable USB device available."

I’m now stuck at this point. Has anyone encountered this issue before or has an idea how to fix it? Should I install a specific driver for this DFU mode, or did I misconfigure something?

Thanks in advance,
Klossy

2

Maybe modify boards.txt to add the custom VID/PID so the IDE recognizes the Uno R4 M board with non-standard VID/PID.