OBD II UART Hookup Guide

Contributors: Toni_K

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.

Software

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:

• Schematic (PDF)
• Eagle Files (ZIP)
• Datasheet
  • STN1110 (PDF)
  • MCP2551(PDF)
  • ELM327 (PDF)
• ELM327 Command Set (PDF)
• Compatible Software List
• GitHub Repo
• SparkFun According to Pete #56 How CAN BUS Works
• SparkFun According to Pete #57 How OBD2 Works

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: