Quantity   Component name
1 × Onion Omega
1 × Onion Omega Expansion Dock
2 × Relay Get the number of relays for the number of garage doors you would like to control
2 × Magnetic Proximity Sensor Get the number of sensors to match the number of garage doors you have
2 × Resistors 10k Ohm
1 × Network Patch Cable You need a decent amount of this
2 × Magnet Inductors, Chokes, Coils and Magnetics / Fixed Inductors, Chokes and Coils