IR Remote Controlled Home Automation using Arduino

Previously we have covered many types of Home automations using different technologies like DTMF Based Home Automation, PC Controlled Home Automation using Arduino, Bluetooth Controlled Home Automation. In this project, we are using IR based wireless communication for controlling home appliances. In this project, Arduino is used for controlling whole the process. We send some commands to the controlling system by using IR TV/DVD/MP3 remote for controlling AC home appliances. After receiving signal from IR remote, Arduino sends related signal to relays which are responsible for switching ON or OFF of the home appliances through a relay driver.

 

Working Explanation:

Working of this project is easily understandable. When we press any button of IR Remote then remote sends a code in form of train of encoded pulses using 38Khz modulating frequency. These pulses are received by TSOP1738 sensor and read by Arduino and then Arduino decodes received train of pulse into a hex value and compares that decoded value with the predefined hex value of the pressed button. If any match occurs then Arduino perform relative operation and the corresponding result is also displayed on 16x2 LCD by using appropriate commands. Here in this project we have used 3 bulbs of different colors, for demonstration which indicates Fan, Light and TV.

 

There are many types of IR Remote are available for different device but most of them are worked on around 38KHz Frequency signal. Here in this project we control home appliances using IR TV remote. For detecting IR remote signal, we use TSOP1738 IR Receiver. This TSOP1738 sensor can sense 38Khz Frequency signal. The working of IR remote and the TSOP1738 can be covered in detail in this article: IR Transmitter and Receiver

TSOP1738

 

Components: 

  • Arduino UNO
  • TSOP1738
  • IR TV/DVD Remote
  • ULN2003
  • Relays 5 volt
  • Bulb with holder
  • Connecting wires
  • Bread board
  • 16x2 LCD
  • Power supply
  • PVT
  • IC 7805

Here in this project we have used 7, 8 and 9 number button of IR remote, for controlling Fan, Light and TV respectively and ON/OFF button (Power button) is used for turning ON and OFF all the appliances simultaneously.

 

Here we have used toggle [EVEN ODD] method for ON and OFF the single home appliance. Toggle method is nothing but to get that whether the button is pressed even no of times or the odd no of times. This is found by getting the reminder after dividing it by 2 (i%2), if there is some reminder then device will be turned ON and if reminder is 0 then it will be turned OFF. Suppose Key 7 is pressed on the remote then remote sends a signal to Arduino through TSOP IR Receiver. Then Arduino decode it and store the decoded value into the results variable. Now results variable has a hex value 0x1FE00FF, after matching it with the predefined hex value of key 7 (see above image), Arduino turns ON the Fan. Now when we press the same key (key 7) again then IR sends the same code. Arduino gets same code and matched with same code like before but this time Fan turned OFF because of toggling the bit [EVEN ODD] (i%2). 

 

Decoding IR Remote Control Signals using Arduino:

Here is a list of a DVD NEC type Remote decoded output codes:

IR Remote and Hex codes

If you don’t know the Decoded output for your IR remote, it can be easily found, just follow these steps:

  1. Download the IR remote library from here https://github.com/z3t0/Arduino-IRremote.
  2. Unzip it, and place it in your Arduino ‘Libraries’ folder. Then rename the extracted folder to IRremote.
  3. Run the below program from your Arduino and open the Serial Monitor window in Arduino IDE. Now press any IR Remote button and see the corresponding decoded hex output in Serial Monitor window.
 * IRremote: IRrecvDemo - demonstrates receiving IR codes with IRrecv
 * An IR detector/demodulator must be connected to the input RECV_PIN.
 * Version 0.1 July, 2009
 * Copyright 2009 Ken Shirriff
 * http://arcfn.com
 */

#include <IRremote.h>
int RECV_PIN = 11;
IRrecv irrecv(RECV_PIN);
decode_results results;
void setup()
{
  Serial.begin(9600);
  irrecv.enableIRIn(); // Start the receiver
}
void loop() {
  if (irrecv.decode(&results)) {
    Serial.println(results.value, HEX);
    irrecv.resume(); // Receive the next value
  }
  delay(100);
}

The above program is taken from IRremote library’s ‘examples’ folder, you can check out more examples to learn more about using the IR remote. So that’s how we decoded the IR remote output. 

 

Circuit Description:

Connections of this circuit is very simple here a liquid crystal display is used for displaying status of home appliances which is directly connected to arduino in 4-bit mode. Data pins of LCD namely RS, EN, D4, D5, D6, D7 are connected to arduino digital pin number 6, 7, 8, 9, 10, 11. And output pin of TSOP1738 is directly connected at digital pin number 14 (A) of Arduino. And Vcc pin is connected a +5 volt and GND pin connected at Ground terminal of circuit. A relay driver namely ULN2003 is also used for driving relays. 5 volt SPDT 3 relays are used for controlling LIGHT, FAN and TV. And relays are connected to arduino pin number 3, 4 and 5 through relay driver ULN2003 for controlling LIGHT, FAN and TV respectively.

IR Remote Controlled Home Automation Circuit Diagram

Code Description: 

In programming part of this project First of all in programming we includes library for IR remote which is easily available at Google. And define pin and declare variables.

#include <IRremote.h>
const int RECV_PIN=14;
IRrecv irrecv(RECV_PIN);
decode_results results;

 And then include a header for liquid crystal display and then we defines data and control pins for LCD and home appliances.

#include<LiquidCrystal.h>
LiquidCrystal lcd(6,7,8,9,10,11);

#define Fan 3
#define Light 4
#define TV 5

After it we need to initialize the LCD and give direction of pin that are used for fan , light and TV.

void setup()
{
  Serial.begin(9600);
  lcd.begin(16,2);
  pinMode(Fan, OUTPUT);
  pinMode(Light, OUTPUT);
  pinMode(TV, OUTPUT);

As already explained, below part of the code is used to compare the received hex value to already defined hex code of that button. If it matched then a relative operation is performed by using appropriate functions that are given in code.

void loop() 
{
  if (irrecv.decode(&results)) 
   {
     Serial.println(results.value,HEX);
     delay(100);
     lcd.setCursor(0,0);
     lcd.print("Fan   Light  TV"); 
     if(results.value==0x1FE00FF)
     {
        i++;
        int x=i%2;
        digitalWrite(Fan, x);
Code: 

#include<LiquidCrystal.h>
#include <IRremote.h>
const int RECV_PIN=14;
IRrecv irrecv(RECV_PIN);
decode_results results;
#include<LiquidCrystal.h>
LiquidCrystal lcd(6,7,8,9,10,11);

#define Fan 3
#define Light 4
#define TV 5

int i=0,j=0,k=0,n=0;

void setup()
{
  Serial.begin(9600);
  lcd.begin(16,2);
  pinMode(Fan, OUTPUT);
  pinMode(Light, OUTPUT);
  pinMode(TV, OUTPUT);
  //digitalWrite(13,HIGH);
  lcd.print("Remote Controlled");
  lcd.setCursor(0,1);
  lcd.print("Home Automation");
  delay(2000);
  lcd.clear();
  lcd.print("Circuit Digest");
  lcd.setCursor(0,1);
  delay(1000);
  lcd.print("System Ready...");
  delay(1000);
  irrecv.enableIRIn(); // Start the receiver
  irrecv.blink13(true);
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Fan   Light  TV ");
  lcd.setCursor(0,1);
  lcd.print("OFF    OFF   OFF");
}

void loop() 
{
  if (irrecv.decode(&results)) 
   {
     Serial.println(results.value,HEX);
     delay(100);
     lcd.setCursor(0,0);
     lcd.print("Fan   Light  TV"); 
     if(results.value==0x1FE00FF)
     {
        i++;
        int x=i%2;
        digitalWrite(Fan, x);
        lcd.setCursor(0,1);
        if(x)
        lcd.print("ON  ");
        else
        lcd.print("OFF ");
       // delay(200);
     }
    
     else if(results.value==0x1FEF00F)    //  key 1 

     {
        j++;
        int x=j%2;
        digitalWrite(Light, x);
        lcd.setCursor(6,1);
        if(x)
        lcd.print("ON   ");
        else
        lcd.print("OFF  ");
       // delay(200);
     }
   
     if(results.value==0x1FE9867)
     {
        k++;
        int x=k%2;
        digitalWrite(TV, x);
        lcd.setCursor(13,1);
        if(x)
        lcd.print("ON ");
        else
        lcd.print("OFF");
       // delay(200);
       }
       
        if(results.value==0x1FE48B7)
       {
        n++;
        int x=n%2;
        digitalWrite(TV, x);
        digitalWrite(Fan,x);
        digitalWrite(Light,x);
        lcd.setCursor(0,1);
        if(x)
        lcd.print("ON     ON    ON ");
        else
        lcd.print("OFF    OFF   OFF");
        //delay(200);
       }
     irrecv.resume(); // Receive the next value
     //delay(100);
   }
}

Video: 

Comments (38)

  • Zawar Ali's picture
    Zawar Ali

    Hi
    from where i can get Remote decoded output codes of any tv or led ?
    method describe to get the codes please.....

    Jan 21, 2016
  • Jayant's picture
    Jayant

    We have updated the description and added the Method to Decode the IR remote signals, just check above.

    Feb 12, 2016
  • paresh palav's picture
    paresh palav

    hello
    is there any method to decode ir remote signals without using arduino ?
    bcoz i dont have one . i have usbasp and ATmega8.
    thnx.

    Jan 25, 2016
  • azwaa's picture
    azwaa

    all the example programs in the library given above have error in compiling tell me what to do

    Feb 21, 2016
  • saddam khan's picture
    saddam khan

    i think you have added a wrong library. download a new one from github and then try.

    Feb 25, 2016
  • harish kumar's picture
    harish kumar

    hi it is the nice project sir
    but what is a PVT it give in component list ?pls tell about PVT
    anyway project is awesome

    Apr 09, 2016
  • Raymond Keung's picture
    Raymond Keung

    Can I use the VS1838B replace the TSOP1738?  How can I change the code? Can you show me the new code? Thank you!!!!!

    Apr 14, 2016
  • prashant's picture
    prashant

    awesome can i get the project report

    May 07, 2016
  • ODEH CLEMENT's picture
    ODEH CLEMENT

    Awesome work but can i get complete of the project. thank you

    May 17, 2016
  • Abhishek's picture
    Abhishek

    Thanks!
    It is the complete Project.

    May 28, 2016
  • siva teja's picture
    siva teja

    excusme sir, i am the begginner to make project, i dont have any experience before making any project, will you give me the making video of this project , i hope that you will help me sir..

    Jun 13, 2016
  • victor's picture
    victor

    if we are using this to control our home light,how else can a bypass be made in case we don't need it at anytime ,can we use a diode to to th at

    Jun 21, 2016
  • Rohan Sahini's picture
    Rohan Sahini

    I am a newbie. I want to know exactly the connections between the relay board and arduino as well as where to connect the pins of the relay board's data pins and how to connect the relay board to the appliances.

    Jun 23, 2016
  • Abhishek's picture
    Abhishek

    Follow the circuit diagram, and learn more about the Pins of Relay Here.

    Jul 09, 2016
  • Lebogang's picture
    Lebogang

    Good day
    Can I use PIC177F88 to decode IR remote signal

    Aug 20, 2016
  • Abhishek's picture
    Abhishek

    Yes you can but its comparatively much easier with Arduino.

    Aug 22, 2016
  • kshitish's picture
    kshitish

    there are some garbage values and symbols are showing while i light the bulbs using the remote so how solve it?

    Oct 27, 2016
  • Abhishek's picture
    Abhishek

    Try printing all the values on Serial monitor as well as LCD, then check if serial monitor also show Garbage values. There are only constant Strings in lcd.print, so there should be no garbage values.

    Nov 30, 2016
  • sourav's picture
    sourav

    how to store the the condition into the eeprom memory,, when power off then power coming then all appliances going on condition

    Oct 29, 2016
  • thiru 's picture
    thiru

    What kind Arduino used whwther it is uno r1 or r2 or r3

    Nov 27, 2016
  • fathi's picture
    fathi

    i have done insert and run the code in arduino but when i press button not have any output at window. Where the receiver the signal? arduino?

    Dec 03, 2016
  • Ameer's picture
    Ameer

    Hii....i jst saw ur circuit and video...but in u components list u hav mentioned an extra component 7805...y r we using it...and its not ther in the circuit...and wat is PVT as shown in the components list

    Dec 28, 2016
  • Abhishek's picture
    Abhishek

    You can use IC 7805 to regulate the voltage to 5v, it will smooth out the power supply. And PVT is Terminal Block on Relay board, green color block which have two screws.

    Dec 31, 2016
  • Yugandar's picture
    Yugandar

    Hi
    can i get the design of the board on which u connected the relays,ULN2003.

    Jan 22, 2017
  • sharique's picture
    sharique

    can we use arduino mega instead of arduino uno in this project because i have mega with me .

    Jan 22, 2017
  • Maddy's picture
    Maddy

    Yes you can use Arduino Mega

    Mar 04, 2017
  • Rockey's picture
    Rockey

    sir can we use this source code for 8051 microcontroller ?

    Jan 28, 2017
  • sikander's picture
    sikander

    can i implement this code using atmega16?

    Mar 01, 2017
  • Balaji's picture
    Balaji

    Can anyone tell me what is that 10k in the circuit diagram....if it is resistor plss tell the type of resistor.......in design of schematic i dont no wat to use for connection between VEE nd resistor.......so plsss say the type of resistor

    Mar 11, 2017
  • Shyla's picture
    Shyla

    I desire to control my lights using my phone.
    But i don't have a bluetooth module.
    What can i use in its place.
    Thnks.

    Mar 12, 2017
  • ameer suhail's picture
    ameer suhail

    actually i copied ur code to the aurduino software but the problem is an error woke up saying TKD2 not been declared in the program

    Mar 14, 2017
  • T.Suresh's picture
    T.Suresh

    bro!me too getting the same error.did u get the solution

    Mar 31, 2017
  • PRADEEP's picture
    PRADEEP

    how much will it cost to implement this project (specify where can i get cheaper equipmenst).

    Mar 28, 2017
  • shubham's picture
    shubham

    i need a clear picture of remote automation using arduino
    for my major project

    Apr 20, 2017
  • chetan's picture
    chetan

    all thing is perfect but when im switch on the fan tubilght starts flickerng,,, how to fix this

    Apr 25, 2017

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