Why didn't you just feed the NMEA stream from the arduino to the PC over usb?
I've begun messing with the arduino in my setup. I have that 4 relay board, a real time clock, digital temp sensor, and a current sensor with nice lcd screen. It's working beautifully. I'll have to update my thread with the progress.
Former author of LinuxICE, nghost, nobdy.
Current author of Automotive Message Broker (AMB).
Works on Tizen IVI. Does not represent anyone or anything but himself.