GI: "YarGauge" replacement clock module (Digital Tach, etc.)

[yappari]

Originally Posted by CTScott

For the right hand clock clusters, there's no place within the cluster to mount it (without cutting plastic). My original thought with this whole thing is that it would really be for the tachless people. It started off as simply a tach in place of the clock and then the more I thought about it the more features that kept popping to mind.

Correct on the sensor probe for outside temp (although if I can figure out the CAN messaging for the A/C ECU, I can use it's outside temp probe and save people having to run a probe wire through the firewall).

I am making great progress on this. I built a CAN bus interface this week and can read the PIDs (all of the standard OBD data), can read and reset stored DTCs, and can sniff the communication on the CAN bus between the ECM and the body ECUs.

Are you by any chance using an Arduino for the microcontroller for all of this or are you programming your own PIC? I've recently started ordering some electronics to do something similar but probably not as sophisticated as what you're planning. I've read that an ELM preprogrammed pic is great for interfacing with the CAN bus, but it seemed a little costly and difficult to use. I asked an electric engineer where I worked (I used to work as a plastic engineer at the Corolla plant) and he said that I shouldn't have a problem interfacing with the ISO bus for Toyota cars if it's a cheaper/easier solution. I've got all the parts but the programming is still killing me even in this with the easy platform of the Arduino though, I'd like to keep hear about your progress though. Please keep us updated