Blue tooth module
This is a nice video how dismantle the module, but as I can see in the video the module keeps flashing even disconnected. On my bike after a while nothing flashes as if the power switches off.
I did some more tests. Voltages are ok. 72 V incoming from main battery and 4 V from buffer battery.
Used other sim card still the same LED's do their sequence and go out.
I can hear the module making a light squeeking/peeping noise.
No jumpers or anything.
I think I will pass at the dealer to see if he has one on stock and ask if I can try the app with that bike.