Question about values

[Dropsik]

Question about values

[yangosoft]

Hi!

Check the data that you are getting.

Print the bytes one to one and try to do the calculations by hand.

It could be also that your OBD2 dongle is not sending the data.

I'm not totally sure if B8 PIDs are different from B7 but at least the standard one must be the same.

BR,
yango

[Dropsik]

After few tests:

• oilTemp is not supported in my car
• getSMC() function retrieve correct value (checked with VCDS), but after call this funtion it's completly stop refreshing data.

[Dropsik]

Ok, I made a little debuging
getRpm();
getSpeed();
getBattery();
getTurboPressure();
getEngineLoad();
getEGT();
getCoolant();
works perfect and give reliable data until I call getSMC();
SEND_BLE("ATSH7E0\r"); cause that I got reliable data for DPF, but completly random for these above.

[yangosoft]

Make sure you only send ATSH7E0 once. This sets the ELM327 to use 7bits CAN messages, if I'm not wrong.

And remember to reset all stored values in ELM327.

[Dropsik]

I'm using initODB() from your code - so ATD is sent.
And funny thing - you send ATSH7E0 twice ;)
https://github.com/yangosoft/dpf/blob/master/src/dpf.cpp#L275
https://github.com/yangosoft/dpf/blob/master/src/dpf.cpp#L487

[Dropsik]

My source code:
https://github.com/Dropsik/dpf/blob/master/arduino/obd2/obd2.ino

[yangosoft]

@Dropsik did you manage to get fully working?

[Dropsik]

Unfortunately no.
I assume, that my elm327 adapter is ok (works with android app and show values). But I have no idea how to resolve problem

[Dropsik]

@yangosoft If you have any ideas or maybe the can try my code I'll be appreciated help.

[yangosoft]

Sadly I sold my nice car a few months ago and I don't have access to a CAGA engine.

Try to debug the Bluetooh traffic between an app and the device: https://stackoverflow.com/questions/23877761/sniffing-logging-your-own-android-bluetooth-traffic this should give you a hint about the correct sequence of commands.