I am a bit new to making circuits and had no idea on how to start my OBD project. So, I just dove in spend money on a lot of neet gadgets and thought, maybe someone else could use some of this knowledge without spending as much money... So if you're trying to make an OBD scanner or some other project that involves talking to your car, maybe this page will help.

There are a few chips out there that will help you make an OBD scanner, the most popular is the ELM32x. When I started (even now) I just wanted to talk to my car, so I bought one of these ELM cables, but had no luck. I couldn't even communicate with it. Then I heard about the STN1110, which at OBD Solutions they literally give away samples. If you follow the datasheet, you can easily put together a minimal configuration on a bread board in an evening.

I've put together a simple program to send and receive communication to it here

. I'll have more when I finish the circuit...