Arduino OBD-II Adapter Library & Examples
(C)2012-2013 Stanley Huang
The Arduino OBD-II Adapter is a product that works as a vehicle OBD-II data bridge for Arduino with open-source Arduino library provided. Besides providing OBD-II data access, it also provides power supply (converted and regulated from OBD-II port) for Arduino and its attached devices.
Product page: http://arduinodev.com/hardware/obd-kit/
About the library
In current version of the library, following OBD-II PIDs are defined:
Vehicle speed (PID_SPEED)
Engine RPM (PID_RPM)
Throttle position (PID_THROTTLE)
Calculated Engine load (PID_ENGINE_LOAD)
Absolute Engine load (PID_ABS_ENGINE_LOAD)
Engine coolant temperature (PID_COOLANT_TEMP)
Intake temperature (PID_INTAKE_TEMP)
Intake MAP (PID_INTAKE_PRESSURE)
MAF flow pressure (PID_MAF_FLOW)
Fuel pressure (PID_FUEL_PRESSURE)
Fuel level (PID_FUEL_LEVEL)
Barometric pressure (PID_BAROMETRIC)
Ignition timing advance (PID_TIMING_ADVANCE)
Engine running time (PID_RUNTIME)
Vehicle running distance (PID_DISTANCE)
Additional defines can be added to access all OBD-II PIDs which the car's ECU provides.
Directory Descriptions
libraries/OBD - Arduino library for OBD-II adapter
samples/rpm_led - a simplest example sketch implementing a RPM indicator with the pin 13 LED on Arduino board
samples/dashboard_1602 - an example sketch showing a set of vehicle data with a LCD1602 shield
samples/dashboard_4884 - a sketch providing extensive display of vehicle data with a LCD4884 shield
samples/dashboard_oled - a sketch providing extensive display of vehicle data with a OLED module
samples/obdtest - a testing sketch for OBD-II adapter
obdlogger - a complete OBD-II and GPS data logger (http://obd.arduinodev.com)