Freematics Forum

So I worked out how to get custom OBD commands working - for anything outside of the standards PIDs in the library, you have to use direct AT Commands. The function I have running well is posted below in the hope it helps someone else. There are a couple of quirks that I think are related to the ...

got a little bit further in formatting - believe the mode setting should be the following:

obd.dataMode = 21;
if (obd.readPID(02, value)) {
value = value - 50;


Not 100% on the equation yet but I'll sort that once I start getting data in.

the bit i'm not sure on now is the header - needs to ...

Hi all,

I've read through a few posts now about custom PIDs but I'm not 100% clear on the procedure.

I've got the OBD UART adaptor hooked up and talking to the car fine with standard PIDs.

I have a custom PID I need to retrieve (AT Temp), settings out of Torque are:

OBD2 mode and PID:
2102 ...