This is the source code for the Arduino OBD-II data logger, which displays (on a 128x64 OLED display module) and records (to a SD card) a selected set of OBD-II data. For hardware configuration and wiring guide, please refer to: http://obd.arduinodev.com The recorded data is stored in CSV format and the file can be illustrated into a graphic chart by a free service at: http://obd.arduinodev.com/view.html To open the project file (obdlogger.cbp), please download CodeBlocks Arduino Edition (http://www.arduinodev.com/codeblocks). The source code is distributed under GPL license.