Arduino friendly VAN bus writer library utilizing ESP32 RMT peripheral.
VAN bus is pretty similar to CAN bus. It was used in many cars (Peugeot, Citroen) made by PSA.
Please don't use this project! It was a proof of concept which failed. To have a fully working alternative, check this link: Arduino TSS463C VAN interface library
Although it is possible to generate VAN message packets with the RMT peripheral of the ESP32 it can't be used safely as it will overwrite messages sent by other peripherals on the bus. It kind-of works on the bench with just one multifunction display however in a car it will cause troubles.
Copy the following files to your documents\Arduino\libraries\esp32_arduino_rmt_van_tx folder
- esp32_rmt_van_tx.c
- esp32_arduino_rmt_van_tx.cpp
- esp32_arduino_rmt_van_tx.h
- esp32_rmt_van_tx.h
- keywords.txt
- library.properties
Check the esp32_arduino_van_writer folder for an example
Check the main folder for an example
Please note that the code does not contain any bus arbitratrion logic. So I don't recommend to use it in a car.
- Write logic to listen if the bus is free for sending messages
- Find out the correct schematics to write to the bus (the current one above has only CAN_L connected)
I would like to thank Graham Auld for his work and CRC-15 implementation which can be found here Also thanks goes to Kim Eckert for his idea of RMT durations