I wanted to give a quick status about a project I recently forked from a dormant GitHub repository for monitoring 8192 baud ALDL streams from OBD-I GM ECMs.

Being an experienced engineer/scientist and an amateur mechanic, I decided that I needed more data from the 3.1L V6 LH0 in my 1992 Camaro RS if I were to properly diagnose and learn along the way. Also, I was looking for something that had the 80’s command line UNIX/DOS aesthetic to match the era of the car.

Photos/video are below — the code is compiled on a Raspberry Pi in an integrated 7” screen display case connected to the ECM through an ALDL USB cable from Red Devil. The address definitions were modified from an original LT1 configuration to a LH0 definition ($88 from a TunerPro RT file I found). The console is fully-customizable to display whatever addresses are coded up — the ones shown are some low-hanging fruit as I play around with the arrangement of the displays.

If if people are interested in the step-by-step guide on how this was coded up/compiled and how the Pi was configured, I’d be willing to write a How To — let me know! ~PG

Nice work!

Totally amazed by the ingenuity of this forum. Awesome job!

In for more info on this.

I would also like to get some insight into your code. I've been using a modified version of a Linux PC LT1 ALDL program (ALDL-io) I got from GitHub which I compiled for and am running on a Pi 3. My ecm is a GM MEFI 3 unit which utilizes the general GM ALDL type of commands and data monitor output with a MEFI 3 specific datastream decode definition. Thx

Very cool

That's what I ever wanted to do... Please teach us how to!

I'd be interested in a how to. I'd love to build one that would hang out in the car like in the video.

I'm interested in a How-to on this as well!

Me seven!

Yes, cool! I grabbed one of these to play around with in the home office. I was trying to run it over wifi, though, and something somewhere kept timing out, or going into sleep mode, disconnecting it from the network that only a reboot would fix. I shelved the project until I get a larger home router so I can hard wire the thing into the network. Other projects, though.....

You're not the only one who's done this. I've seen someone on another forum who's messing with the Pi to datalog on his vehicles.

The Pi displaying the stats from the computer won't need a network connection, Unless you are talking a bluetooth connection between the PI and the adapter. I haven't seen many OBD1 units that have bluetooth. It uses the 12v power and the ALDL cable in the picture. The PI would need to be able to run a program that can decode the stream across the USB connection. If I knew how to do that in Python I could probably come up with a cool display.

Thats frigin sweet. I need to get something like this for my MS2. This power on/off with ignition power?