This is a fork of nroach44's canscan (https://git.nroach44.info/NRoach44/arduinostuff/src/master)

He has a much better write up on this than I do, check it out here: https://nroach44.id.au/index.php/2016/05/25/dis-on-a-mazda3-bks2/

This project won't work with the stock headunit installed, if you want to take full advantage of this you'll need an aftermarket headunit installed and a bracket that retains the original screen.