I am sorry: But BT links are capricious depending on devices...
This project was started be myself and Martin, for free and without any warranty it would work for everybody and any android devices....
Canion is a wonderful app that has given me very much insight into the lives of the batteries.
I also have/had problems with BT. When driving it could sometime stop working and was hard to pair again. Almost always when the car was turned off and the Canion was still on, the BT connection stopped working.
I now have tried to turn off a number of Canion panels. Basically I am only interested in Battery Voltage. This has helped and 1000 km has elapsed without any disconnect.
My personal theory is that there is Canion overload that causes the problems. I used to delete the BTCAN folder and that also helped for some time