For full open source, there's Speeduino and FOME (newer). I've used both for my cars. https://speeduino.com/home/ https://speeduino.com/home/ https://wiki.fome.

For full open source, there's Speeduino and FOME (newer). I've used both for my cars. https://speeduino.com/home/ https://speeduino.com/home/ https://wiki.fome.tech/ https://wiki.fome.tech/