I started this project as a school project. Actually, I wanted to create something that would benefit the society. Therefore, I started examining what are the different problems that are exiting in the world that could be solved. Then, I found out that "Misuse of Electricity" and "Shortage of electricity" are some of the problems faced by the people of India. Therefore, I designed this system for the above mentioned purpose.
The materials used in my project are given below along with their respective price (all price are in INR per piece);
Breadboard - INR 60
Four Channel Relay Module- INR 130
HC-SR04 Ultrasonic distance sensor - INR 80
Arduino Uno - INR 1500
Generic Jumper wire Male to Male - INR 5 (about 50-70 required)
Generic Jumper wire Male to Female - INR 5 (about 50-70 required)
9v Power Adapter - INR 100
HC - 05 BLUETOOTH MODULE - INR 250
Therefore, The total Cost of my project is around INR 4000
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Step 1: PRINCIPLE
The working principle of this whole system is that:
1)The ultrasonic sensor will detect human presence
2) Relay module will control all the appliances but it will not be connected to sockets as there may be a need to turn it on when there are no people in a room
3) Smart Edge will take various sensors values display via Brainium server since this kit has sensor with high accuracy
*The relay module will be installed between the appliances and switch so to run the appliances there will an automated switch (run by Arduino Uno) and a normal manual switch
** If there is a need to run any appliance without human presence it can be achieved for 2 hrs via a customized app.
***To run the fan ( or ac) there will be two conditions first the human presence and second the temperature should be high enough(22 degree Celsius)
****To run the light there will be two conditions first the human presence and second the light intensity should be high enough (4.5 analog value)
Step 2: BUILDING THE HOUSE
You can use any kind of model for this purpose, but the condition is that you need to have a house made of any material without any roof. I am enclosing the pictures of my (made) house.
Step 3: MAKING THE CONNECTIONS
The Smart Edge Agile needs no wiring while the remaining components may be wired AS ABOVE.
Step 4: WRITING THE CODE:
The Code for Arduino IDE is given below in the attachment part and for more details please see the comments. A detailed description of the app is given in the the video in the last video in testing part.
Step 5: MAKING APP
I used the MIT App Inventor to make the app. For detailed description please refer to the second video in the principle part. Here are the screenshots of the blocks:
Step 6: TESTING
You may proceed for testing the prototype by following the video as above.