Freematics Forum

Hi, Using Freematics OBD-II UART Adapter V2.1 on Arduino reading a GM vehicle... The baro PID; 0x33 is returning the number "45". I was expecting something like 101 (kpa) for sea level. Anyone else run into that? I've been searching for alternate PID for GM baro but no luck. Can't tell if ...

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Hi,
probably a real noob question but....Can anyone give me some pointers (tools/docs) on how to use Freematics/obd2 library to query other modes other than mode 1? I'm trying to query various GM specific PIDs...

TIA,
Paul

Thank you.

Paul

Hi,
I have the OBD-II adapter 2.1...Even after I shut off the car and disconnect the Arduino power, the adapter remains up and running.
Is it possible to power it off so it doesn't drain the car battery?

Thanks,
Paul