Ok, this is cooler than all get out! Something I've been wanting to do for a while now.
Coming from someone who designed an all-out Arduino Cell phone, this is high praise; thank you!!!
I've vaguely following this. You tried to use the built in CAN bus stuff from the teensy but backed away and went with the blue tooth thing? Am I getting this right? If so why did you back away from using the teensy? Maybe I'm wrong because I see you have on on your PC board.
I did originally try to access the CAN port directly via the Teensy (plus CAN transcievers), but after accidentally resetting my car's diagnostics computer two or three times I decided to use the COTS bluetooth OBDII device. Since implementing the bluetooth device, I have yet to have a problem with it like I did when directly using the CAN port.
I still, though, use the Teensy to interface with the bluetooth device and drive the LED displays.
[u]All in all,[/u] I've found the documentation on how to hook-up, interface, and (ESPECIALLY) develop code for the Teensy's CAN ports to be vague and nearly non-existant. I did find a CAN library for my T3.5, but the library code mixed with a lack of direction on how to use it caused my car's diagnostics computer to reset when using one of the example sketches (and that's pretty scary when it happens in your Charger R/T :) ).
If someone were to do an in-depth look at how Teensy <--> Automotive CAN works and create a super comprehensive tutorial, I'd be interested in trying it out again ( ;) )