I have a stalled project to read events from one of my car's CAN buses that I really need to get back to... The easily accessible OBD-II port is either the wrong network, or filters out the interior cabin stuff I'm interested in.<p>Even as a non-C/C++ person, it was honestly easier than I expected to get raw data: A small breadboard with an ESP32 chip and a CAN transceiver chip, power them both from my phone's USB-C port, and run an app to log serial output coming back over the same cable. I just need to plug the transceiver's high/low CAN wires into the right spots to start recording raw messages.<p>The biggest frustration, besides removing stubborn car paneling, is that so much of the CAN bus traffic is undocumented (no DBC) so I need to change things and look for time-correlated patterns.
A (hopefully) concise & practical introduction:<p>2 min theory followed by 2 min of listening to an existing network followed by 2 min of common pitfalls when building your own network.<p>I built my own electric cars from 2018 - 2023 and am now sharing everything I learnt with you in a series of videos and on <a href="https://foxev.io/academy" rel="nofollow">https://foxev.io/academy</a> in a learning web app :)<p>I hope this helps someone!