This project has been implemented for quite a while and lot of improvements have been made since the original demo which has a lot of functions at Arduino Day 2014 at Chennai. I decided to make this code open source after a lot of requests came in after I opened up my room up to the Internet, allowing anyone to control the lights in my room through a browser. Will you believe me if i told you i received over 22,523 visitors in just 2 days?
This guide is just the tip of the ice berg to build a complete home automation project using Arduino. In the coming months, we will build a complete home automation project which will include a lot more features. In this, we will build a ethernet controlled home automation to control 3 LED’s or switches in your room.
If you’re new to the world of Arduino, Check out our Getting started guide for Arduino.
Hardware Needed :
- Arduino UNO R3
- Ethernet Shield – What are Arduino Shields?
- LED’s,Relay
- LM35 (Temperature Sensor)
- Light-Dependent Resistor (LDR)
Pin’s :
- LED’s : Digital Pin’s 4,5,6
- LM35 : Analog Pin 2
- Light Dependent Resistor : Analog Pin 3
Arduino Sketch :
#include // FOR HTHE THERNET LIBRARY
#include
include // FOR SENDING IR COMMANDS
IRsend irsend; // SEDNDING IR CODES
// IR VALUES
unsigned int AC_ON1[60]={8450,4100,600,1450,650,400,600,450,600,450,600,1500,600,400,650,400,600,450,600,450,600,450,600,450,600,400,650,400,600,450,600,450,600,450,600,400,650,400,650,1450,600,1500,600,400,650,1450,600,450,600,450,600,450,550,1500,600,1500,600,1500,600};
unsigned int AC_OFF1[60]={8450,4050,600,1500,600,450,600,450,600,400,650,1450,600,450,600,450,600,400,650,1450,600,1500,600,450,600,400,650,400,600,450,600,450,600,450,600,450,600,400,650,400,600,450,600,450,600,1500,600,400,650,1450,600,450,600,450,600,400,650,1450,600};
unsigned int chUp1[36]={500,200,200,250,200,550,250,350,250,500,250,200,250,200,250,200,200,250,150,600,200,550,250,350,250,700,200,250,200,550,250,200,200,250,200};
unsigned int chDw1[36]={500,200,200,200,250,550,250,350,250,500,250,250,150,250,200,250,200,200,250,200,200,550,250,350,250,700,250,200,250,500,250,200,250,350,250};
unsigned int Source1[67]={4550,4500,600,1650,650,1600,650,1600,650,500,600,500,650,500,600,550,600,500,600,1650,650,1600,650,1600,650,500,600,500,650,500,600,550,600,500,650,1600,650,500,600,500,650,500,600,500,650,500,600,500,600,550,600,550,600,1650,600,1650,600,1650,600,1650,650,1600,600,1650,650,1600,650};
// LED STUFF
boolean a=0;// LED 1 STATUS
boolean b=0;// LED 2 STATUS
boolean c=0;// SWITCH CASE
boolean d=0;// LED 3 STATUS
float temp_val = 0; // TEMPERATUERE VALUE
int ldr_val = 0; // LIGHT INTENSITY VALUE
boolean reading = false; //ETHERNET
// ETHERNET SETTINGS
byte ip[] = { 192, 168, 1, 221 };
byte gateway[] = { 192, 168, 1, 1 };
byte subnet[] = { 255, 255, 255, 0 };
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
EthernetServer server = EthernetServer(80); //port 80
// IR REMOTE STUFF
void AC_ON()
{
irsend.sendRaw(AC_ON1,60,38);
delay(20);
}
void AC_OFF()
{
irsend.sendRaw(AC_OFF1,60,38);
delay(20);
}
void chUp()
{
for(int i = 0; i < 5; i++) {
irsend.sendRaw(chUp1,36,38);
delay(20);
}
}
void chDw()
{
for(int i = 0; i < 10; i++) {
irsend.sendRaw(chDw1,36,38);
delay(20);
}
}
void Source()
{
irsend.sendRaw(Source1,67,38);
delay(20);
Serial.print("Source changed ");
}
void Temp()
{
}
void Ldr()
{
}
void setup(){
Serial.begin(9600);
pinMode(4,OUTPUT); //LED 1
pinMode(5,OUTPUT); //LED 2
pinMode(6,OUTPUT); //LED 3
analogReference(INTERNAL); // Setup the Reference Voltage as Internal
Ethernet.begin(mac);
Ethernet.begin(mac, ip, gateway, subnet); //for manual setup
server.begin();
Serial.println(Ethernet.localIP());
}
void loop(){
// listen for incoming clients, and process qequest.
checkForClient();
}
void checkForClient(){
EthernetClient client = server.available();
if (client) {
// an http request ends with a blank line
boolean currentLineIsBlank = true;
boolean sentHeader = false;
while (client.connected()) {
if (client.available()) {
if(!sentHeader){
// send a standard http response header
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println();
sentHeader = true;
}
char c = client.read();
if(reading && c == ' ') reading = false;
if(c == '?') reading = true; //found the ?, begin reading the info
if(reading){
Serial.print(c);
switch (c) {
// CONTROLLING THE AC
case 'O': // -O Turn On AC
AC_ON();
break;
case 'F': // - F Turn Off AC
AC_OFF();
break;
case 'U': // - U Channel Up
chUp();
break;
case 'D': // - D Channel Down
chDw();
break;
// CONTROLLING THE LEDs
case '1': // LED 1 ON
if(a==0){
digitalWrite(4,HIGH);
client.print("Light1 Turned On ");
a=1;}
break;
case '2': // LED 1 OFF
if(a==1){
digitalWrite(4,LOW);
client.print("Light1 Turned Off ");
a=0;}
break;
case '3': // LED 2 ON
if(b==0){
digitalWrite(5,HIGH);
client.print("Light2 Turned On ");
b=1;}
break;
case '4': // LED 2 OFF
if(b==1){
digitalWrite(5,LOW);
client.print("Light2 Turned Off ");
b=0;}
break;
case '5': // LED 3 ON
if(d==0){
digitalWrite(6,HIGH);
client.print("Light2 Turned On ");
d=1;}
break;
case '6': // LED 3 OFF
if(d==1){
digitalWrite(6,LOW);
client.print("Light2 Turned Off ");
d=0;}
break;
// STORE THE STATUS OF THE PINS
case '7': // POST VALUE OF LED 1
client.print(a);
break;
case '8': // POST VALUE OF LED 2
client.print(b);
break;
case '9': // POST VALUE OF LED 3
client.print(d);
break;
case 'T': // -T Print the temperature
{
int sensor_val = analogRead(2); // Read the raw sensor value and store it in the variable
temp_val = sensor_val * 0.11; // The calculated value
client.println(temp_val); // print the temperature value to serial monitor
}
break;
case 'L': // -L Light Intensity
{
ldr_val = analogRead(3);// Reads a 10-bit value corresponding to the voltage applied on analog input pin 3.
client.println(ldr_val);//
} break;
}
}
if (c == '\n' && currentLineIsBlank) break;
if (c == '\n') {
currentLineIsBlank = true;
}else if (c != '\r') {
currentLineIsBlank = false;
}
}
}
delay(1); // give the web browser time to receive the data
client.stop(); // close the connection:
}
}
The code can be cloned from my github repository as well.
