On your Linux system, open a terminal window and login as root (or use sudo). Enter the following:modprobe ftdi_sio <ret> / echo VVVV PPPP > /sys/bus/usb-serial/drivers/ftdi_sio/new_id <ret> / …where VVVV is the USB Vendor ID (0403 for FTDI) and PPPP is the custom Product ID. Plug in the FTDI device programmed with the desired PID, and enter: dmesg | grep FTDI <ret> You should see confirmation that the device is recognized and assigned a COM port.This PID assignment will remain until the Linux system is rebooted.
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