Simple Diy Smartfan Using Raspberrypi

This project demonstrates the use of Raspberry Pi as an IoT device. First we control the turning ON/OFF of LEDs using a cgi scripts and then control the turning ON/OFF of FAN using a webpage that can be accessed from any device over the same network onto which Raspberry Pi is connected. The concepts of this project can be used to further implement various home automation projects.

Hardware components

1. Raspberry Pi 3B+ - https://www.raspberrypi.com/products/raspberry-pi-3-model-b-plus
2. Motor Driver - https://robu.in/product/l293d-motor-driver-module/
3. Jumper Wires
4. LEDs
5. Memory card(SD card) for Raspberry Pi

STEP 1: Download the raspberry Pi imager from this official raspberry pi website https://www.raspberrypi.com/software/

STEP 2: Follow this official video on Raspberry Pi os installation on SD card https://youtu.be/ntaXWS8Lk34

First we need to update and upgrade our Raspberry Pi using the following commands

sudo apt-get update

sudo apt-get upgrade -y

To install the Apache web server on our Raspberry Pi use the below command

sudo apt install apache2 -y

After the installation we need to enable the cgi mod to execute our CGI scripts through webpage

sudo a2enmod cgi

Change the working directory to /usr/lib/cgi-bin

cd /usr/lib/cgi-bin

create a new .cgi file using the below command

sudo nano on.cgi

The cgi scrpit is attached below

change the permission of the CGI script using the below command

sudo chmod +x on.cgi

To execute the CGI script use ./on.cgi command

./on.cgi

change the working directory to /var/www/html

cd /var/www/html

To list the files in the directory use command

ls

There we can find a html file named index.html

use the command ifconfig to find the Raspberry Pi's IP address before that the raspberrypi should be connected with local network either through LAN or WIFI.

open the webpage with the Raspberry Pi's IP address and we can see the default Apache Webpage.

we need to create our own html page to control the FAN.use the below pdf which contains simple html code

move the downloaded images for on.jpg and off.jpg to the directory /var/www/html

sudo mv on.jpg /var/www/html

sudo mv off.jpg /var/www/html

That's it we mad our simple webpage to control our fan.

Here is the step by step video tutorial to make simple diy smart fan using Raspberry Pi.

Follow through the tutorial to make your own home automation projects.

connect GPIO PINS 17 and 18 (Wiring Pi) to the motor driver input I1 and I2