Freematics Forum

The accelerometer data has 3 parts for X/Y/Z axis.

Yes, correct.

You mean the supplied power adapter does not work?

KWP2000 is well supported.

Sure you can. The ATMega328 in the data logger can work as I2C master. Actually the onboard MPU6050 is accessed via I2C.

Good to know that! Have fun!

Saving the protocol type in eeprom is a good idea.

I see some people connecting I2C adapter to Arduino's Rx and Tx and apparently Rx and Tx pins are not for I2C communication. Did you connect the wires correctly?

Are you sure the Rx and Tx wire are connected to D1 and D0 correctly. Have you tried swapping them? Could you take a pic of the OBD adapter? I also want to make sure it is the correct model.

Here is the updated OBD library which forces to different protocols when automatic identifying is not working. Please try it and let me know if it works well before I will commit it to github.