https://github.com/stanleyhuangyc/ArduinoOBD

OBD-II library and sketches for Arduino
https://github.com/stanleyhuangyc/ArduinoOBD

Last synced: about 2 months ago
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OBD-II library and sketches for Arduino

• Host: GitHub
• URL: https://github.com/stanleyhuangyc/ArduinoOBD
• Owner: stanleyhuangyc
• Created: 2013-03-24T16:58:43.000Z (over 11 years ago)
• Default Branch: master
• Last Pushed: 2024-02-14T09:56:48.000Z (7 months ago)
• Last Synced: 2024-06-30T18:10:03.812Z (3 months ago)
• Language: C++
• Homepage: http://freematics.com
• Size: 2.37 MB
• Stars: 965
• Watchers: 175
• Forks: 519
• Open Issues: 58
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

• Awesome-arduino - ArduinoOBD - OBD-II library and sketches for Arduino (Libraries)
• awesome-arduino - ArduinoOBD - OBD-II library and sketches for Arduino (Libraries)

README

        
Arduino OBD-II Adapter Library & Sketches

=========================================

(C)2012-2018 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 9-DOF motion sensor and voltmeter for measuring vehicle battery power. The adapter draws power from OBD-II port and convert it to 5V for powering attached device.

Related Products

* [Freematics OBD-II UART Adapter](https://freematics.com/pages/products/freematics-obd-ii-uart-adapter-mk2/)

* [Freematics OBD-II I2C Adapter](https://freematics.com/pages/products/arduino-obd-adapter/)

* [OBD-II Telematics Mega Kit](https://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_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)

megaloggerHD - OBD-II and GPS data logger based on 480x320 TFT LCD display (for Arduino MEGA)

tester - a testing sketch for OBD-II communication and capability

utilites - useful utility source code for development