Abstract:
This report presents the design of an IoT Contactless doorbell and home security system with alerts. The main objective of this project is to develop and implement a highly effective doorway security system that allows real-time monitoring of all people and other things coming across or near the doors and gates of different homes with different intentions. Due to the coming of covid-19 in this 21st century, there has been an increased need for contactless and automated systems in the whole world where we shouldn’t be touching anything from outside of our houses as we will be contributing more to the spread of germs everywhere around us which is not what we want right now.
The system consists of two units: Indoor Unit and Outdoor Unit. The outdoor Unit deployed an infrared proximity sensor and ESP32-CAM board with an LED flashlight over it. Usually, a visitor making a visit to someone’s place reaches the doorstep and notifies the owner inside by ringing the doorbell available at the doorway. Here the same procedure will be followed except for a minor change that the doorbell switch has been replaced here with a contactless sensor-based switch. So, here the visitor needs to raise his/ her hand closer to the deployed sensor to trigger the doorbell. As soon as the sensor detects someone, the owner inside will be notified by a message on the Blynk project dashboard over the smartphone followed by a visitor’s picture clicked by the ESP32-CAM.
The Indoor Unit has a servo motor in control of the user and another IR proximity sensor. The system empowers the user to unlock the door via the smartphone by using a virtual button provided in the Blynk application dashboard created for this project. Also, the user can click multiple pictures of the visitor if required by using another virtual button named ‘Take Photo’ on the same dashboard screen. The image clicked and the notification appeared on the same dashboard screen the via Blynk server. For the smooth working of this prototype both the devices i.e., ESP32-CAM and the user’s smartphone must share the same Wi-Fi credentials, otherwise, there would be no connectivity between the two.
