I got myself a ScanTool ECU simulator to be able to test stuff from my desk. I connected an ELM327 bluetooth to the simulator to test and it does work with my android app. I can see when I turn the knob the speed for example changes.
then I connected my M2 to 12V, ground, Can high and CAN low pins of the simulator to test and nothing!
SavvyCan is showing no traffic.
I also flashed the CAN_AutoBaud into my M2 and all I can see in the Serial Monitor is:
Doing Auto Baud scan on CAN0
Doing Auto Baud scan on CAN1
and then nothing.
I checked the voltage on ground and 12V and also can high and low are showing 2.5V
I also switched the can high and low around to see maybe it works. still nothing.