OBD II UART Hookup Guide

Contributors: Toni_K
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Resources and Going Further

Now that you've gotten the basics down for communicating with the OBD-II UART board, try modifying the example sketch to work with parameter IDs that are supported on your particular vehicle.


You can also work with some free software available online, that prints the data out into cool graphs and meters for you without any programming required, other than using a serial port. Check out a current list of freeware for OBD boards below.

Now that you've successfully got your OBD II UART up and running, it's time to incorporate it into your own project!

For more information, check out the resources below:

Or check out these videos from According to Pete's explanation of CAN BUS and OBD-II:

Need some inspiration for your next project? Check out some of these related tutorials:

CAN-BUS Shield Hookup Guide

A basic introduction to working with the CAN-Bus shield.

Getting Started with OBD-II

A general guide to the OBD-II protocols used for communication in automotive and industrial applications.

AST-CAN485 Hookup Guide

The AST CAN485 is a miniature Arduino in the compact form factor of the ProMini. In addition to all the usual features it has on-board CAN and RS485 ports enabling quick and easy interfacing to a multitude of industrial devices.