This should make it possible to get in the car and go: If the phone is registered by the car audio, it will connect audio via bluetooth, the app will detect this, and connect to the OBD dongle, and start scanning data at the requested interval, without any user action.
This should make it possible to get in the car and go: If the phone is registered by the car audio, it will connect audio via bluetooth, the app will detect this, and connect to the OBD dongle, and start scanning data at the requested interval, without any user action.