Freematics Forum

In current implementation of OBD library, only mode 01 is handled. You can though send "0902\r" to request for the VIN data and parse it.

Setting echo off does not mean there will be no response. Echo is regarding to the sending back of the received bytes.
ATZ does a lot work including initialization and that's why it's slow. You can send ATV for getting version information.

Can you try this configuration first:

The majority of users have no problem compiling the sketch. I really don't know why you have these errors.

What's the OBD time (polling interval) you got?

So you didn't connect adatper's VCC? It should work with universal ground. Can you check what Teensy receive from the adapter? Is it in plain text?

The 5V output of the OBD-II adapter is fully regulated. So the VCC should goes to Arduino's 5V instead of VIN.

What's the compiler error message?

It's correct. VCC is 5V on Arduino.

I have no idea what caused this. I have never seen it on my end.