On the empeg side, the usual m.o for terminal servers is just to use telnet, and I'm sure I can find code on the linux side to make a telnet session look like a serial port, or modify gpsapp to telnet to a commserver port. (Same with freediag)

If you can get that to work, that'd be sweet! That's the solution I'd like to use.

In the meantime, am I inferring correctly that you're working getting OBDII running using the tuner serial port? Let me know if I can help in any way.

I don't know much about component electronics (I wish I did). The thread talking about the serial port on the tuner seemed to allude to needing to add some stuff (resistors?) and that's where I'd need some help.

Since I currently have neither a GPS, nor an OBD-II interface, I've not looked into it very deeply. What I will probably start with is OBD via the standard serial port. If you get the TINI working, then I'd get one of those and a GPS.