From connected cars to connected wearables to home security, the Internet of Things is rapidly marking its presence in every field. Now we have IoT enabled home automation and security devices that can be controlled from anywhere in the world using the Internet of Things. There are many kinds of Wi-Fi door lock available in the market which makes your home more secure and saves time in finding the keys. Here we are also building a similar Wi-Fi door lock which can be controlled from the Smartphone.
So in this project, we are going to make an IOT based Door Lock System using NodeMCU, Solenoid Lock, and Adafruit IO. Here NodeMCU will act as the main controller and connect the user to the door lock system using the Internet. This allows the user to lock/unlock his Home’s door lock by using a smartphone from anywhere in the world.
Smart Door Lock Circuit Diagram
The circuit diagram for the Wi-Fi door lock is given below.
Connections for this IoT Smart Door Lock are very simple as we are only connecting a solenoid lock, relay module, and a buzzer with NodeMCU ESP8266. The input pin of the relay is connected to the D5 pin of NodeMCU while VCC and Ground pins are connected to Vin and GND pin of NodeMCU. The positive pin of the buzzer is connected to the D6 pin of NodeMCU, and the GND pin is connected to the GND of NodeMCU.
Read full Article: https://www.iotdesignpro.com/projects/iot-based-smart-door-lock-system-using-nodemcu
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