When I remove the USB-power source for the Bluetooth then it corrupts many tables on the config. I use 1.2.10 and triggerframe. Do I need to cut some rs232 pins off? Leave only Pin3 and pin5?
Hi,
I have tried to recreate this with the Vems Bluetooth adapter without success and I have send an information request to the firmware team to see if the ECU still listen to the old style commands after it has started receiving triggerframe protocol commands. I would expect that it still does this now. With some bad luck this would allow table corruption if your Bluetooth adapter is sending junk data while the power is removed.
I have not been able to test exactly the same way you did as I power my Vems Bluetooth adapter with 5v from the ECU to the RS232 connector on my test bench. I have simply shorted the 5v to ground for a second or two to force a reset on the Bluetooth dongle. This will create a quicker loss of power then just severing the power connection.
Currently the simplest workaround I see for you is to disconnect the RX pin on the ECU to prevent the junk data from the resetting Bluetooth adapter from reaching the ECU. This will however limit you to the AIM protocol. As an alternative you could try to power the bluetooth adapter from pin 28 on the ECU. I hope that the Bluetooth adapter will not start to send junk data until the ECU has shut down.
Jörgen