GPS handover fails when disconnecting Android Auto

While using ABRP with Android Auto, navigation worked correctly and GPS updates were smooth. After disconnecting Android Auto, ABRP defaulted to GPS data from my OBD dongle instead of the phone’s built-in GPS. The dongle refreshes much more slowly, resulting in significant delays in positioning updates.

When Android Auto is disconnected, ABRP should seamlessly switch GPS positioning back to the phone’s internal GPS, which provides a faster refresh rate, instead of relying on the OBD dongle.

Steps to reproduce:

1. Start navigation in ABRP with Android Auto connected.

2. Keep OBD dongle connected via Bluetooth.

3. Disconnect Android Auto.

4. Observe that ABRP continues using the slow OBD GPS feed instead of the phone’s GPS.

Impact:

Navigation becomes inaccurate and lags behind the car’s actual position due to the slow OBD refresh rate.