Jeep Bot – Proof of Concept #1

I finished the 1st proof-of-concept for using the CAN-Bus data to control auxiliary relays. It worked great. Attached is a block diagram of what I used, and a longish video of how the testing went.

Jeep Bot Block Diagram


If you want to skip all the bench testing, the actual in-car testing happens at the 11:15 mark of the video.

Code for the demo can be found at

A few hours after I finished, a bluetooth-low-energy board I ordered showed up. The next step will be to throw that on there so that I can use the smartphone to configure each switch and optionally control them by hand.

Each switch will have the following different possible control states:

  • always on
  • manual only
  • on when interior lights are on
  • on when high-beams are on

Right after that, I’ll start working on a prototype PCB and housing so I can start testing real versions of this system.

I’ll post the design, schematics and code in progress on my blog so anyone can offer feedback as it gets built.