This Arduino library is developed for the Arduino OBD-II Adapter (http://freematics.com). Several example sketches are provided for demonstrating the usage of the library as well as for real data logging use.
The aim of the project is to provide Arduino vehicle connectivity via the OBD-II port with easy-to-use Arduino library so Arduino lovers can start play Arduino on their cars easily.
Source code repository: https://github.com/stanleyhuangyc/ArduinoOBD
Works and fast.