Quantity   Component name
1 × KeyDuino or a NFC shield http://www.seeedstudio.com/depot/NFC-Shield-V20-p-1370.html
1 × Relay shield http://www.elecrow.com/wiki/index.php?title=Relay_Shield
1 × (optionnal) BLE shield http://www.seeedstudio.com/depot/Bluetooth-40-Low-Energy-BLE-Shield-v20-p-1631.html