Resources:
- https://stackoverflow.com/questions/22899475/android-sample-bluetooth-code-to-send-a-simple-string-via-bluetooth
- https://medium.com/@avigezerit/bluetooth-low-energy-on-android-22bc7310387a
- https://developer.android.com/guide/topics/connectivity/bluetooth#FindDevices
- https://developer.android.com/reference/android/bluetooth/BluetoothAdapter.html
- https://android.jlelse.eu/android-bluetooth-low-energy-communication-simplified-d4fc67d3d26e
- https://www.bignerdranch.com/blog/bluetooth-low-energy-part-1/
- https://github.com/bignerdranch/android-bluetooth-testbed/blob/master/BluetoothLowEnergy/app/src/main/java/com/bignerdranch/android/bluetoothtestbed/client/ClientActivity.java
- https://riptutorial.com/android/example/30768/using-a-gatt-server
- https://riptutorial.com/android/example/30764/connecting-to-a-gatt-server