Use an ESP32 to log, find or watch a given CAN PID/octet/bit, from a vehicle CAN bus.
This is a derivative work based on the esp-idf example twai_network_listen_only.
Used to dump and find OBD PIDs on PSA high speed CAN I/S bus.
https://blog.zakkemble.net/car-rev-alarm-and-gear-indicator/
https://www.elm327.fr/norme-obd/modes-obd/
https://github.com/fabiobaltieri/open-usb-can https://www.carhackingvillage.com/getting-started https://www.tellert.de/files/media/temes/help/position-of-can-signals-(start.html