I now finally was able to modifiy the USB PID of my devices from 90B1 to 9091. After that the devices apperar as normal in the Windows device manager and work and behave as our former ones. Here is what I did:
- Install a fresh version of Linux Mint (Ubuntu clone)
- Compile and install device drivers from source.
- Install picocom to send AT commands via USB serial port (minicom did not work for me by unknown reason).
- Connect to the modem by sudo picocom /dev/ttyUSB1
With that I was able to send the AT commands to the modem to switch from VID 90B1 to 9091. The following commands were used: - ATE1 (set echo to true)
- AT!ENTERCND=“A710” (enable admin mode)
- AT!USBPID? (Query current USB PID. Should respond with APP: 90B1, BOOT: 90B0)
- ATUSBPID=9091 (Set PID to 9091)
- AT!RESET (restart modem)
After that modem behaves as expected.