Arduino OBD-II Adapter Library & Sketches ========================================= (C)2012-2015 Freematics.com OBD-II Adapter for Arduino is a product that works as a vehicle OBD-II data bridge for Arduino (literally all embedded platforms) with open-source Arduino library provided. Besides providing easy-to-use OBD-II data access, it also integrates 6-axis or 9-axis MEMS sensor module and a voltmeter for measuring vehicle battery power. The adapter draws power from OBD-II port and convert it to 5V for powering attached device. OBD-II Adapter: http://freematics.com/pages/products/arduino-obd-adapter/ OBD-II Telematics DIY Kit: http://freematics.com/pages/products/arduino-telematics-kit-3/ ![Image](http://www.arduinodev.com/wp-content/uploads/2012/03/obdkit1-150x150.jpg) About the library ----------------- Most commonly use PIDs are defined in OBD library as followings. Engine PID_RPM – Engine RPM (rpm) PID_ENGINE_LOAD – Calculated engine load (%) PID_COOLANT_TEMP – Engine coolant temperature (°C) PID_ENGINE_LOAD – Calculated Engine load (%) PID_ABSOLUTE_ENGINE_LOAD – Absolute Engine load (%) PID_TIMING_ADVANCE – Ignition timing advance (°) PID_ENGINE_OIL_TEMP – Engine oil temperature (°C) PID_ENGINE_TORQUE_PERCENTAGE – Engine torque percentage (%) PID_ENGINE_REF_TORQUE – Engine reference torque (Nm) Intake/Exhaust PID_INTAKE_TEMP – Intake temperature (°C) PID_INTAKE_PRESSURE – Intake manifold absolute pressure (kPa) PID_MAF_FLOW – MAF flow pressure (grams/s) PID_BAROMETRIC – Barometric pressure (kPa) Speed/Time PID_SPEED – Vehicle speed (km/h) PID_RUNTIME – Engine running time (second) PID_DISTANCE – Vehicle running distance (km) Driver PID_THROTTLE – Throttle position (%) PID_AMBIENT_TEMP – Ambient temperature (°C) Electric Systems PID_CONTROL_MODULE_VOLTAGE – vehicle control module voltage (V) PID_HYBRID_BATTERY_PERCENTAGE – Hybrid battery pack remaining life (%) Additional defines can be added to access other OBD-II PIDs. Directory Descriptions ---------------------- libraries - all Arduino libraries needed for OBD-II adapter and kits samples - several simple sketches for testing purpose nanologger - OBD-II data logger working with 128x64 monochrome OLED display (for Arduino Nano) megalogger - OBD-II and GPS data logger based on 320x240 TFT LCD display (for Arduino MEGA) tester - a testing sketch for OBD-II communication and capability utilites - useful utility source code for development