Open the door, anytime, anywhere.
Without connecting the lock to the internet
And you control which phone numbers it will respond to.
Control 2 doors
Manage both your apartment door and front door with one device.
Cloudless, using SMS
Lock and unlock the door from anywhere by sending an SMS.
You decide what should happen when the power fails.
Creating the lock
Connect the relay(s)
Connect the IN pin of the relay to signal signal pin 5.
If you would like to control two electric locks, connect the IN pin of the second relay to signal pin 6.
Electric locks can either be locked when they are not powered ("fail secure") or unlocked ("fail safe"). In the example above, the flow of electricity to the electric lock is "normally open" (N.O.), which means no electricity flows to your lock unless the relay is activated.
If you prefer that when the smart lock activates it interrupts the flow of electricity, then use the "normally closed" (N.C.) port of the relay instead.
Connect the GSM modem
Connect its U_TXD (Transmit) pin to signal pin 3, and connect its U_RXD (Receive) pin to signal pin 4. Connect a GND pin on the modem to a GND pin on the expansion board.
Make sure the antenna is screwed on securely.
Connect the USB splitter cable (optional)
This will allow you to power both the RF Nano and the GSM modem from a single USB charger. Connect the longer part to the RF nano.
Alternatively, you could just use two separate normal USB cables that are both connected to a charger with two USB ports.
Important: make sure your charger can supply at least 2.4 amps.
Plug in the RF-Nano Arduino
Plug the RF-Nano into its socket. The USB connector should be on the outside of the main board.
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