OK, Sorry, I guess I asked on the wrong forum. I want software that will take analog data. I dont have a "protocol" I am a programmer and I dont work up in the stratosphere with "Protocols". Those are expensive pieces of metal/plastic boxes. I work with bits and bytes and I have analog data that I want to display on the computer. I just thought someone might have already done it.
I am not looking to do GPS, thats already written a hundered time over. But, as you say, potentiometer outputs etc. Rudder position in particular, switch positions later. Easy to do a pot and then adjust the voltage range to match the computer needs. In the old days the parallel port or the serial port were the easy way. But laptops today dont have a parallel port, Everything is now USB. The old parallel port was nice because each pin could be a different switch. Lots of pins....LOL