I've been mulling over using the Pi as a data logging solution for recording OBD-II data and GPS data to overlay on Video information. I have a track car, and have been looking at Data Logging units and the prices are astronomical.
The car is relativly old, so it does not have CAN BUS for its ECU, but instead uses the older OBD-II standard. I'm trying to figure out whether using the GPIO on the Pi will be better/easier than using the standard USB type connections. I know there is software out there for Linux that will allow me to log the data, so using that sort of thing, allong with some nice Push-button tactile switched, coupled with a couple of LEDs would allow me to have a light-weight, stand-alone system, which I can leave in the car at all times, and just whip out the SD card with my data on for analysis.
I'm new to this whole thing, so any advice is greatly appreciated.