http://srqzezgrcqbequac733i3fej7d2cymzdiy5biie46tpib3ii7mfxfcad.onion/current.php
If you have better ideas you can write to me. My idea/prototype is a device with a GPS, Bluetooth, microSD and a microcontroller and a 2nd device with only Bluetooth, microSD and a microcontroller. The first device is attached to a vehicle.