Github for the gateway: tmkdev - github - gmlan_gw

Logged data out of a new 2017 GMC truck. It's totally different then the older 29bit as per the GMLAN bible. Log in the repo.

Life again..

Been a while since I was last active here. I am back playing with GMLAN. This time on a 2009 CTS-V and a raspberry pi with a SWCAN interface board.

Stay tuned - I'll start a github shortly with some logs and some code.

Current project plan is to use the Pi as a gateway. Push drive logs from the pi to the web via a bluetooth tethered phone and push notifications from the phone to the car. I want to be able to see SMS messages on the DIC. Maybe other things.

Good news is the Caddy and the G8 messaging are pretty much the same..

Shell script for ELM327 logging

Next latest project.. A bash script to do ELM327 logging.

Plan is to set up a bluetooth ELM327 and have my embedded linux box log what's going on in my car. I have it working on a few PIDs and obdsim. I need to test it on the real thing..

WT-32 Bluegiga..

Hooked up the WT-32 Bluegiga breakout from Sparkfun and got it working sorta. Paired it with my phone and got A2DP with autoconnect working. Verified analog audio comes out.

Sadly it only has iWrap 3.0 on it which is missing some of the features I need (AVRCP). Will try and update the firmware to 4.0 this weekend and hopefully get it interfaced to a AVR/Arduino for prototyping.. Or make a small brick...

The next project..

I liked my iPod. But my Android phone with bluetooth and a subsonic backend media server kinda made it irrelevant.

So it's time to bring the iPod adapter into the new world.

I have two ideas:

Integrated Bluetooth A2DP and AVRCP control with the Pontiac G8. Use wheel controls to play/ff/rev a Bluetooth device. Display playing track info on the DIC. I have all the parts, just need to spend some time putting them all together.

Cemublue - Yep. Take the E&C bus cassette emulator and bring it into the bluetooth world. Should be almost easier then the G8/GMLan solution!

Have decided on using a bluegiga WL-32 module as the bluetooth core. Will update with progress (I hope there is progress!)

$25 arm computer. Yeah.

http://www.raspberrypi.org/

This will make for interesting carputers/OBD loggers/etc. I can't wait!

Cassette Emulation Board - Work in progress

Folks,

The Cemu board as published needs a code revision and 2 mod wires to work. Took quite a bit of head scratching to figure out the issues. Mode wire #1 - the 5V regulator is not grounded. Mod wire #2 - one of the audio paths is not connected to the 3.5mm plug. Code change - the ec_tx and ec_rx are swapped.

Will post new code and board/eagle files this week. With that said, it is working like a charm now.