I'm trying to control homebuilt gauges with an Arduino microprocessor. Is there a program for FS9 or FSX that ideally would allow me to select the gauges I need the data for and sequentially send a gauge identifier and its data out a usb port? It would just keep cycling through the list of gauges continuously. The Arduino just watches the usb port and interprets the data.

Something like for altitude, ias, heading:
gauge 1 20500
gauge 2 180
gauge 3 275
repeat

Probably can be set up in FSUIPC? But I'm not real familiar with its usage.