This project will benefit college students by letting them know when the faculty is in his chamber and when he is not. Using this they can save time and work efficiently. It uses Ultrasonic sensors which sense the presence of the faculty in a room and update their status in real time. The status is shown on the mobile app and is very simple.
Working of Ultrasonic sensor :-
Active ultrasonic sensors generate high-frequency sound waves and evaluate the echo which is received back by the sensor, measuring the time interval between sending the signal and receiving the echo to determine the distance to an object.
Here are the sample pictures displaying the project.
Happy Hacking :)