Getting wrong temperature value

[Yanickr1973]

Hi everyone,

I just received my UART OBD2 adapter and did a quick sketch to try it

I am reading the following PIDs:

obd.read(PID_RPM, rpm);
obd.read(PID_AMBIENT_TEMP, temp);
obd.read(PID_SPEED, vitesse);
obd.read(PID_CONTROL_MODULE_VOLTAGE, volt);


Everything is fine exept for the Ambient temp which gives me a value of around 517 (it's minus -11 outside right now)


Am I doing something wrong?

Thank's!

[stanley]

You need to check if read() returns true of false. If the data is not available from your car, it returns false and thus value is not valid.