Freematics OBD-II Adapter (http://freematics.com/pages/products/freematics-obd-adapter/) is an Arduino compatible device with OBD-II access and many useful peripherals, including 6-axis motion sensor, microSD storage and BLE wireless module, all accessible with Arduino libraries.
firmware - firmware (Arduino sketch) for Freematics OBD-II Adapter (discontinued)
firmware_v2 - firmware (Arduino sketch) for Freematics OBD-II Data Logger V2
firmware_v3 - firmware (Arduino sketch) for Freematics OBD-II Data Logger V3
libraries - Arduino libraries used in firmware
Data2KML (http://arduinodev.com/data2kml-utility/) is an open-source command line utility which converts data logged by obdlogger or megalogger to KML file loading in Google Earth.
A web service (http://freematics.com/chart/) is provided to view data logged by obdlogger or megalogger.