- Download IOT Remote onto phone.
- Upgrade and include magnetic sensor data on dashboard.
- Press each button and record all buttons and their corresponding magnetic signature from wear and small mechanical differences.
- Place phone near gate keypad entrance.
- Record signatures.
- Take signatures, the peaks and troughs and match to recorded signal and corresponding button.
Note: Buttons with more wear should work better. Also, maybe applying a coat of various magnetic materials, such as very tiny magnetic spheres or even some sort of solder, etc can help to differentiate buttons.