Hi and a happy New year, Please add VID 0x243d PID 0001 to USB-serial generic driver. That is a heating control running on STM32F1xx and provide a VCP based of STMs VCP lib. It also provide a mass storage, but this is correct detected. Greetings, Rene-- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html