IoT Based Home Automation Using Arduino

This project will show you how to develop a DIY IoT based home automation system.

AdvancedFull instructions provided3 hours1,015

Things used in this project

Hardware components

STEMpedia evive IoT Kit

Software apps and online services

Arduino IDE

Story

Intro: IoT Based Home Automation Using Arduino Powered Embbeded Platform

You come home late from work, manage to get to your room somehow and launch yourself right at your bed to call it day but then you realize that you left the lights on and you neither have the energy nor are in the mood to get up. But alas, you don’t have a choice; well, only if you have manual switches.

What if we told you that you could control the lights and fans of your room, sitting (or lying?) in one place, with just a few taps on your Smartphone?

Behold the great IoT Based Home Automation System! With its powers, you can easily turn ON and OFF the light as and when you like without moving an inch. Life (for now) = Sorted!

So, why are you still lying on your bed?

Ready. Set. Automate!

Step 1: Things You'll Need:

evive
ESP8266 Module (ESP-12) Or WiFi Module
5V Relay Module
Male to Female jumper Cables
M3 bolts of 8mm Length
M3 Nuts
Thick Cardboard or Wood

The above Electrical Components can be obtained in our evive IoT Kit. There are many projects listed on our Hackster which can be made using this Kit.

Step 2: Holding the Connections:

We just cannot keep connections hanging. We need something to hold them. We need to assemble a box using cardboard or a wood.

Stick evive in this box. Cut the electric wires and attach them to the relay. Now, attach the relay to it.

Step 3: Changing the Connections:

As we need to control the home appliances, we need to first connect them to evive.

Open one of the switchboards and near to that place evive.
To the switches of the appliance connect relay at both the terminals. Here the relay works as a switch for the appliance it is connected to.Thus the number of the relays is equal to the number of appliances connected.

Step 4: Completion of the Project:

You need to make the connections as follows:

and apply the following code which can be downloaded from below.

To know more about Arduino, visit: https://thestempedia.com/tutorials/arduino-ide/

Step 5: Working

Once, you are done with them connect to the URL of your WiFi module. Because our WiFi Module acts as a server. The URL which we need to open appears in the Serial Monitor of Arduino.

The page will open up, from where you can control the appliances you want.

For detailed information visit:https://thestempedia.com/project/iot-based-home-automation/

Step 6: Conclusion

With this, your DIY IoT based Home Automation System is ready! You can now control the light and the air with a simple click!

Code

#include "WiFiEsp.h"
#include <EEPROM.h>
#include<evive.h>

char ssid[] = "AR3";            // your network SSID (name)
char pass[] = "STEM@101";        // your network password
int status = WL_IDLE_STATUS;

unsigned char add1 = 10;
unsigned char add2 = 11;

unsigned int relay1 = 2;
unsigned int relay2 = 3;

boolean relay1_state = true;
boolean relay2_state = true;

WiFiEspServer server(80);

RingBuffer buf(8);


void setup()
     {
         // put your setup code here, to run once:

         Serial.begin(9600);   // initialize serial for debugging
         Serial3.begin(115200);    // initialize serial for ESP module
         WiFi.init(&Serial3);    // initialize ESP module

         start_screen();

         for(unsigned int i =2;i<4;i++)
              {
                 pinMode(i,OUTPUT);
              }

         relay1_state = EEPROM.read(add1);
         relay2_state = EEPROM.read(add2);

         digitalWrite(relay1,relay1_state);
         digitalWrite(relay2,relay2_state);

         // attempt to connect to WiFi network
         while (status != WL_CONNECTED)
             {
                Serial.print("Attempting to connect to WPA SSID: ");
                Serial.println(ssid);
                // Connect to WPA/WPA2 network
                status = WiFi.begin(ssid, pass);
             }
             
          digitalWrite(13,HIGH);
          Serial.println("You're connected to the network");
          printWifiStatus();
  
          // start the web server on port 80
          server.begin();


  

}
void loop() 
     {
        // put your main code here, to run repeatedly:

        WiFiEspClient client = server.available();  // listen for incoming clients

        if (client)
           {                                              // if you get a client,
              Serial.println("New client");              // print a message out the serial port
              buf.init();                               // initialize the circular buffer
              while (client.connected())
                   {                                              // loop while the client's connected
                         if (client.available()) 
                               {                                            // if there's bytes to read from the client,
                                    char c = client.read();                // read a byte, then
                                    buf.push(c);                          // push it to the ring buffer

                                    // printing the stream to the serial monitor will slow down
                                    // the receiving of data from the ESP filling the serial buffer
                                    //Serial.write(c);
                                    
                                    // you got two newline characters in a row
                                    // that's the end of the HTTP request, so send a response
                                    if (buf.endsWith("\r\n\r\n"))
                                        {
                                           sendHttpResponse(client);
                                           break;
                                        }
                                    // Check to see if the client request was "GET /H" or "GET /L":
                                    
                                    if (buf.endsWith("GET /A"))
                                          {
                                              relay1_state = false;
                                              EEPROM.write(add1,relay1_state);
                                              digitalWrite(relay1, relay1_state);   
                                          }
                                   else if (buf.endsWith("GET /B"))
                                          {
                                              relay1_state = true;
                                              EEPROM.write(add1,relay1_state);
                                              digitalWrite(relay1, relay1_state);    
                                          }
                                   else if (buf.endsWith("GET /C"))
                                          {
                                              
                                              relay2_state = false;
                                              EEPROM.write(add2,relay2_state);
                                              digitalWrite(relay2, relay2_state);  
                                          }
                                  else if (buf.endsWith("GET /D"))
                                          {
                                             
                                              relay2_state = true;
                                              EEPROM.write(add2,relay2_state);
                                              digitalWrite(relay2, relay2_state);  
                                             
                                          }
                               
        
                                 }
                }
                  // close the connection
                  client.stop();
                  Serial.println("Client disconnected");
          }

}

void sendHttpResponse(WiFiEspClient client)
{
  // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
  // and a content-type so the client knows what's coming, then a blank line:
  client.println("HTTP/1.1 200 OK");
  client.println("Content-type:text/html");
  client.println();
  
  // the content of the HTTP response follows the header:
  client.print("The light is ");
  if(relay1_state==HIGH)
  {
    client.print("OFF");
  }
  else
  {
    client.print("ON");
  }
  
  client.println("<br>");
  client.println("<br>");
  
  client.println("Click <a href=\"/A\">here</a> to turn the light on<br>");
  client.println("Click <a href=\"/B\">here</a> to turn the light off<br>");

  client.println("<br>");
  client.println("<br>");
  client.println("<br>");

   // the content of the HTTP response follows the header:
  client.print("The fan is ");
   if(relay2_state==HIGH)
  {
    client.print("OFF");
  }
  else
  {
    client.print("ON");
  }
  client.println("<br>");
  client.println("<br>");
  
  client.println("Click <a href=\"/C\">here</a> to turn the fan on<br>");
  client.println("Click <a href=\"/D\">here</a> to turn the fan off<br>");

   client.println("<br>");
  client.println("<br>");
  client.println("<br>");
  
  // The HTTP response ends with another blank line:
  client.println();
}

void printWifiStatus()
{
  // print the SSID of the network you're attached to
  Serial.print("SSID: ");
  Serial.println(WiFi.SSID());

  // print your WiFi shield's IP address
  IPAddress ip = WiFi.localIP();
  Serial.print("IP Address: ");
  Serial.println(ip);

  // print where to go in the browser
  Serial.println();
  Serial.print("To see this page in action, open a browser to http://");
  Serial.println(ip);
  Serial.println();
}

void start_screen()
{
   tft_init(INITR_GREENTAB);
 tft.setRotation(1);
 tft.fillScreen(ST7735_BLACK);

 tft.setCursor(25,10);
  tft.setTextSize(2);
  tft.setTextColor(ST7735_WHITE,ST7735_BLACK);
  tft.print("STEMpedia");

   tft.setCursor(5,50);
  tft.setTextSize(1);
  tft.setTextColor(ST7735_GREEN,ST7735_BLACK);
  tft.print("IOT BASED HOME AUTOMATION");
  tft.setCursor(55,60);
  tft.print("SYSTEM");

   tft.setTextColor(ST7735_GREEN,ST7735_BLACK);
  tft.setCursor(0,95);
  tft.setTextSize(1.8);
  tft.print("FOR MORE INFORMATION VISIT");
  tft.setCursor(30,110);
  tft.setTextColor(ST7735_WHITE,ST7735_BLACK);
  tft.print("thestempedia.com");
 
}

Credits

STEMpedia

42 projects • 169 followers

STEMpedia blends theory with experiential learning by offering state-of-the-art technology, projects, tutorials, courses, and much more.

IoT Based Home Automation Using Arduino