Initially, Home Security Interface is in idle state. When a person approaches the device, it will be activated. This is achieved using an Ultrasonic Sensor. HC-SR04 Ultrasonic Distance Sensor is able to measure distances from 2cm to 400cm. Ultrasonic receiver and transmitter is included in the module.
uCAM-II is used in this project to capture images of the person who attempted a forced entry. uCAM-II is an integrated serial camera module, which uses a CMOS VGA colour sensor along with JPEG compression chip.
In addition, a buzzer is also used in this project to produce an alarm signal or noise if the password is entered incorrectly for more than three times.
An alarm message is sent to the owner through a web browser. This uses the built-in ESP8266 module in 4Duino-24. Read more here