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OBD Bluetooth not working - Printable Version

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OBD Bluetooth not working - DaveRack - 10-11-2022

Hello, I have problems establishing a bluetooth obd connection with OAP.



Manually connect and pair works, the adapter also flashes short blue when the OAP dashboard is started, but that's it.



Bluetooth Dongle TP-Link UB400 (CSR8510 A10 chipset).

OAP logfile with errors attached.


RE: OBD Bluetooth not working - Daniel_BlueWave - 10-11-2022

Did you pair your adapter with Rpi? What OBD adapter are you using?

Did you follow configuration from here: https://bluewavestudio.io/community/thread-1865.html ?


RE: OBD Bluetooth not working - DaveRack - 10-11-2022

Yes, paired it with Rpi.

Pair and connect with bluetoothctl works.



yes:

ObdProbePeriod=5

ObdDeviceType=2

ObdAdapterRfCommAddress=XXXX

ObdAdapterRfCommChannel=1  (I tested channel 1 and 2 because sdptool records shows channel 2 for my ELM327.)

ObdMaxNoDataResponseCount=20


It is an elm327 aliexpress adapter, but works with Windows and Android(AT commands also work).


RE: OBD Bluetooth not working - BlueWave - 10-11-2022

Looks like your ELM327 is not genuine one. It probably does not support some commands from startup sequence https://www.bluewavestudio.io/community/showthread.php?tid=2042&pid=11931#pid11931.


RE: OBD Bluetooth not working - DaveRack - 10-11-2022

I tested the at commands manually in windows.
See the screenshot.
Are the results correct?


RE: OBD Bluetooth not working - DaveRack - 10-14-2022

The cheap ELM adapter was to blame.
With a Vgate iCar Pro it works immediately.. Smile


RE: OBD Bluetooth not working - Daniel_BlueWave - 10-15-2022

Cheap not always mean good enoughWink Thanks for the feedback. Enjoy.