Sebastian Yousef of SIGMAGAMMALabs has created an Arduino-compatible OBD-II device in the form of the Teensy-based Horizon OBD-Interface Module.

Hidden under the dash in most modern cars is a secret portal to a wealth of data and diagnostics. Once purely the domain of repair shops, OBD-II dongles are now available inexpensively with Bluetooth and other secondary connections to allow them to easily connect to other devices for analysis.

The module can be programmed and flashed over USB in order to extend the capabilities of the example firmware, with the same interface providing access to ODB-II data such as RPM, ETH, LOAD and SPEED. Built-in Bluetooth and an optional BLE radio further facilitate data collection, plus the Teensy’s microSD card slot can be used for onboard data logging.

More information about the project can be found on the SIGMAGAMMALabs web site.