Data transfer without WiFi

[Elisabeth Brenner]

Unfortunately there is no option to trigger the vibration via phyphox directly. You would have to connect phyphox to an external sensor that is able to vibrate via BLE. And also I do not think, that the magnetic field outside of the box would be strong enough since it is very quickly declining with distance (proportional to 1/r^3) and also there could be ferromagnetic effects caused by the metal box if it has steel components.
I would rather recommend if you do not need live data to start the measurement before closing the box and read the results after opening it again.