How it works

An extra push button on the existing gate controller — with a smart, secure check in front of it.

The parts

In the existing cabinet: a small industrial computer, its own power supply, a timer relay and a radio. To the gate controller it is nothing more than an extra push button, next to the receiver of the remote controls.
In the car: a button (Bluetooth) or a LoRa fob.
At home: a gate button on LoRa, a radio with long range and very low power.
At a resident's home: a small gateway with the management portal.
At the neighbour next to the gate: a second, encrypted connection over his guest Wi-Fi — without touching his own network.

What happens when you press the button

The button announces itself to the cabinet.
The cabinet sends back a one-time number.
The button signs that number with its own secret key.
The cabinet checks: signature, valid access credential, not revoked, gate closed?
If all is well: a short pulse to the gate controller — exactly what a remote control does.

Why this is secure. Replaying a recorded signal does not work, because each number is used only once. Only what the foundation itself has signed counts. And a timer relay makes sure the gate never receives a permanent “open” signal, whatever the software does.

If something goes wrong

The remote control bypasses the addition completely and always keeps working. If the internet fails, buttons and gate buttons keep working. If the computer hangs, a watchdog restarts it. Our whole part can be disconnected with a single terminal block.