Home Automation

I want to control my house lights and etc by a set time or over the internet. I have brought a RTC (DS1302), 8 channel relay board and a Ardurino UNO R3. I even have a RPi Model A+. I'm new to all this. Can you guide me how to start this project. How do I write the sketch.

I tried doing in RPi but I couldn't do it so I brought the Uno R3.

This is what I would like to do. But in this example the person is using an LCD and a different RTC. I don't want to use an LCD.


Thank You

Some web server/client test code that might provide ideas for controlling the relays.

//zoomkat 7-03-12, combined client and server
//simple button GET with iframe code
//for use with IDE 1.0
//open serial monitor and send an g to test client and
//see what the arduino client/server receives
//web page buttons make pin 5 high/low
//use the ' in html instead of " to prevent having to escape the "
//address will look like when submited
//for use with W5100 based ethernet shields
//note that the below bug fix may be required
// http://code.google.com/p/arduino/issues/detail?id=605

#include <SPI.h>
#include <Ethernet.h>

byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; //assign arduino mac address
byte ip[] = {192, 168, 1, 102 }; // ip in lan assigned to arduino
byte gateway[] = {192, 168, 1, 1 }; // internet access via router
byte subnet[] = {255, 255, 255, 0 }; //subnet mask
EthernetServer server(84); //server port arduino server will use
EthernetClient client;
char serverName[] = "checkip.dyndns.com"; // (DNS) zoomkat's test web page server
//byte serverName[] = { 208, 104, 2, 86 }; // (IP) zoomkat web page server IP address

String readString; //used by server to capture GET request 


void setup(){

  pinMode(5, OUTPUT); //pin selected to control
  pinMode(6, OUTPUT); //pin selected to control
  pinMode(7, OUTPUT); //pin selected to control
  pinMode(8, OUTPUT); //pin selected to control

  //pinMode(5, OUTPUT); //pin 5 selected to control
  Serial.println(F("server/client 1.0 test 7/03/12")); // keep track of what is loaded
  Serial.println(F("Send an g in serial monitor to test client")); // what to do to test client

void loop(){
  // check for serial input
  if (Serial.available() > 0) 
    byte inChar;
    inChar = Serial.read();
    if(inChar == 'g')
      sendGET(); // call client sendGET function

  EthernetClient client = server.available();
  if (client) {
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();

        //read char by char HTTP request
        if (readString.length() < 100) {

          //store characters to string 
          readString += c; 

        //if HTTP request has ended
        if (c == '\n') {

          Serial.print(readString); //print to serial monitor for debuging 

            //now output HTML data header
          if(readString.indexOf('?') >=0) { //don't send new page
            client.println(F("HTTP/1.1 204 Zoomkat"));
          else {   
            client.println(F("HTTP/1.1 200 OK")); //send new page on browser request
            client.println(F("Content-Type: text/html"));

            client.println(F("<TITLE>Arduino GET test page</TITLE>"));

            client.println(F("<H1>Zoomkat's simple Arduino 1.0 button</H1>"));

            // DIY buttons
            client.println(F("<a href=/?on2 target=inlineframe>ON</a>")); 
            client.println(F("<a href=/?off3 target=inlineframe>OFF</a>


            client.println(F("<a href=/?on4 target=inlineframe>ON</a>")); 
            client.println(F("<a href=/?off5 target=inlineframe>OFF</a>


            client.println(F("<a href=/?on6 target=inlineframe>ON</a>")); 
            client.println(F("<a href=/?off7 target=inlineframe>OFF</a>


            client.println(F("<a href=/?on8 target=inlineframe>ON</a>")); 
            client.println(F("<a href=/?off9 target=inlineframe>OFF</a>


            client.println(F("&nbsp;<a href=/?off2468 target=inlineframe>ALL ON</a>")); 
            client.println(F("&nbsp;<a href=/?off3579 target=inlineframe>ALL OFF</a>


                      // mousedown buttons
          /*client.println(F("<input type=button value=ON onmousedown=location.href='/?on4;' target=inlineframe>")); 
          client.println(F("<input type=button value=OFF onmousedown=location.href='/?off5;' target=inlineframe>"));        
          client.println(F("&nbsp;<input type=button value='ALL OFF' onmousedown=location.href='/?off3579;' target=inlineframe>

          // mousedown radio buttons
          client.println(F("<input type=radio onmousedown=location.href='/?on6;' target=inlineframe>ON</>")); 
          client.println(F("<input type=radio onmousedown=location.href='/?off7; target=inlineframe'>OFF</>")); 
          client.println(F("&nbsp;<input type=radio onmousedown=location.href='/?off3579;' target=inlineframe>ALL OFF</>

          // custom buttons
          client.print(F("<input type=submit value=ON target=inlineframe style=width:100px;height:45px onClick=location.href='/?on8;'>"));
          client.print(F("<input type=submit value=OFF target=inlineframe style=width:100px;height:45px onClick=location.href='/?off9;' target=inlineframe>"));
          client.print(F("&nbsp;<input type=submit value='ALL OFF' target=inlineframe style=width:100px;height:45px onClick=location.href='/?off3579;' target=inlineframe>"));

            client.println(F("<IFRAME name=inlineframe style='display:none'>"));          


          //stopping client

          ///////////////////// control arduino pin
          if(readString.indexOf('2') >0)//checks for 2
            digitalWrite(5, HIGH);    // set pin 5 high
            Serial.println("Led 5 On");
          if(readString.indexOf('3') >0)//checks for 3
            digitalWrite(5, LOW);    // set pin 5 low
            Serial.println("Led 5 Off");
          if(readString.indexOf('4') >0)//checks for 4
            digitalWrite(6, HIGH);    // set pin 6 high
            Serial.println("Led 6 On");
          if(readString.indexOf('5') >0)//checks for 5
            digitalWrite(6, LOW);    // set pin 6 low
            Serial.println("Led 6 Off");
          if(readString.indexOf('6') >0)//checks for 6
            digitalWrite(7, HIGH);    // set pin 7 high
            Serial.println("Led 7 On");
          if(readString.indexOf('7') >0)//checks for 7
            digitalWrite(7, LOW);    // set pin 7 low
            Serial.println("Led 7 Off");
          if(readString.indexOf('8') >0)//checks for 8
            digitalWrite(8, HIGH);    // set pin 8 high
            Serial.println("Led 8 On");
          if(readString.indexOf('9') >0)//checks for 9
            digitalWrite(8, LOW);    // set pin 8 low
            Serial.println("Led 8 Off");

          //clearing string for next read


void sendGET() //client function to send and receive GET data from external server.
  if (client.connect(serverName, 80)) {
    client.println(F("GET / HTTP/1.1"));
    client.println(F("Host: checkip.dyndns.com"));
    client.println(F("Connection: close"));
  else {
    Serial.println(F("connection failed"));

  while(client.connected() && !client.available()) delay(1); //waits for data
  while (client.connected() || client.available()) { //connected or data available
    char c = client.read();



I’d say that’s a 'big project" for a beginner… You might want to start with a local timer (no Internet communication). You can always expand your project later.

I have brought a RTC (DS1302), 8 channel relay board…

Are all of your lights in the same room?

I always suggest that people use one of the existing Home Automation standards. Check out [u]SmartHome.com[/u] to get an idea of what’s available and the various standards/protocols.

I’ve got an X-10/Insteon system. The X-10 protocols are “open” so you can build your own devices. (I didn’t build any of mine.) Or, you might want to buy controllable light-switch modules and build your own Wi-Fi or Cell Phone accessible controller, etc.

If you stick with an established protocol, you can add switches/devices or controllers later. And, the controllable switches/dimmers are nice because you don’t loose manual control and you don’t have to worry about building a low-voltage power upply everywhere there’s a switch/dimmer/relay… All of that is done for you.