So I'm looking to use an arduino to read RPMs in my car, I'd like to use the OBD part, is this possible I can't seem to find much on it, or any other suggestions. Thanks!

Using Arduino to read RPM in car

Sean August 4, 2009, 4:01pm 2

OBDuino

They are using the ELM-327 interface to extract the OBD2 information.