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smarthome.ino
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smarthome.ino
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#include <SPI.h>
#include <Ethernet.h>
#include <SoftwareSerial.h>
SoftwareSerial sSerial(3, 2); // RX,TX
//ip, mac etc
byte mac[] = {0x00, 0xAA, 0xBB, 0xCC, 0xDE, 0x02 };
IPAddress ip(192,168,1,8);
byte gateway[] = { 192, 168, 1, 1 };
byte subnet[] = { 255, 255, 255, 0 };
byte dnss[] = { 8, 8, 8, 8};
EthernetServer server(80);
int state=0; //by default light/board is OFF
int cstate=0;
int pkey=6; //power key for GSM modem
char c = 0; //for received HTTP header data
char detect;
int i=1;
IPAddress address;
void setup()
{
digitalWrite(8, LOW); //by default light is OFF, connected to pin 8
pinMode(8, OUTPUT);
digitalWrite(9,LOW); //electrical power board, pin 9
pinMode(9,OUTPUT);
pinMode(pkey, OUTPUT); //power key of GSM modem
sSerial.begin(9600); //intialize serial for GSM modem & hw tx/rx
Serial.begin(9600);
Serial.println("Starting serial comm! Enter c to close led, o to light up LED, via serial!");
Serial.println("Getting IP address...");
//static IP
Ethernet.begin(mac, ip, gateway, subnet);
Serial.print("IP address: ");
address=Ethernet.localIP();
Serial.println(address);
server.begin();
digitalWrite(pkey,LOW);
delay(1000);
digitalWrite(pkey,HIGH);
delay(2000);
digitalWrite(pkey,LOW);
delay(3000);
delay(2000);
sSerial.print("AT+IPR=9600\r");
delay(2000);
sSerial.print("AT+CMGF=1\r");
delay(500);
sSerial.print("AT+CMGS=\"+1-your-cell-number\"\r");
delay(500);
sSerial.print("GSM Started.. ;)\r");
delay(500);
sSerial.write(0x1A); //ctrl+z to send message
delay(300);
sSerial.print("AT+CNMI=2,2,0,0,0\r"); //Whenever a message arrives, modem should forward it to serial buffer
delay(500);
} //end setup
void loop()
{
if ( sSerial.available() ) //checking for incoming messages and whether they match our pattern for controlling appliances
{
rf=sSerial.read();
if(rf == '.')
{
rf=sSerial.read();
if(rf == 'l')
{
rf=sSerial.read();
if( rf == '0') //light OFF
{
state=0;
digitalWrite(8,LOW);
smsalert(0);
}
else if(rf == '1') //light ON
{
state=1;
digitalWrite(8,HIGH);
smsalert(1);
}
}
else if ( rf == 'b')
{
rf=sSerial.read();
if(rf == '0')
{
cstate=0;
digitalWrite(9,LOW);
smsalert(3); //board OFF
}
else if(rf=='1')
{
cstate=1;
digitalWrite(9,HIGH);
smsalert(2); //board ON
}
}
} //end if (rf=='.')
}
if( Serial.available() ) //to control light/LED using serial or GSM
{
char d = Serial.read();
Serial.println(" Serial RX detect!");
Serial.println(d);
if (d == 'o')
{
digitalWrite(8,HIGH);
state=1;
}
else if (d == 'c')
{
digitalWrite(8,LOW);
state=0;
}
else
{
state=state;
}
}
EthernetClient client = server.available();
boolean firstline = true; //client's first HTTP request will be first line
if (client)
{
Serial.println("New Client");
boolean blankline = true; //flag for last line of http request
while (client.connected())
{
if (client.available())
{
char c = client.read();
if (c == '\n' && blankline) //end of request from user.. so sending HTTP response
{
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println();
client.println("<html>");
client.println("<head>");
//Refresh to home page after 4 seconds
client.print("<meta http-equiv=\"refresh\" content=\"4; URL=");
client.print("http://");
client.print(address);
client.println("/\">");
client.println("<title>Smart Home</title>");
client.println("</head>");
client.println("<center><p><h1>Web Based Remote Monitoring & Control!</h1></p><center><br/>");
client.print("<p><h2>Light status is <font color=red>");
if(state)
{
client.println("ON :)");
}
else
{
client.println("OFFF :/");
}
client.println("</font></h2></p>");
client.print("<p><h2>And board status is <font color=blue>");
if(cstate)
{
client.println("ON :D");
}
else
{
client.println("OFF :(");
}
client.println("</font></h2></p>");
//starting button
client.println("<form method=GET name=form>");
outputbuttons(client); //call function which will output buttons as HTML, based on state of light/LED
client.println("</form><br />");
client.println("</html>");
break; //done sending response/page.. now exit from WHILE n disconnect client
}
if (c == '\n')
{
firstline = false; //if first line of header traveresed
blankline = true;
}
else if (c != '\r') //if received normal character of http request
{
blankline = false;
}
//Detecting First HTTP request IFFFFF off/on button clicked. Contains GET /?light=0 or GET /?light=1
if (firstline && c == '=')
{
c = client.read();
detect = c;
if (detect == '0') //turn OFF light button pressed!
{
digitalWrite(8, LOW); //ligth's relay connection at pin 8..
state=0;
smsalert(0);
}
else if (detect == '1') //turn ON LIGHT button pressed!
{
digitalWrite(8, HIGH);
state=1;
smsalert(1);
}
else if(detect == 'b')
{
digitalWrite(9,HIGH); //turn ON board.. at pin 9.. by sending HIGH
cstate=1;
smsalert(2);
}
else if(detect == 'c')
{
digitalWrite(9,LOW); //turn OFF board.. by sending HIGH
cstate=0;
smsalert(3);
}
}
} //IF after while end
} //while end
// Response sent.
delay(20);
client.stop();
} //end if client
} //end void loop
void outputbuttons(EthernetClient cc)
{
if (state)
{
cc.println("<button name=\"light\" value=\"0\" type=\"submit\" style=\"height:80px;width:200px\">Turn OFF light!</button>");
}
else
{
cc.println("<button name=\"light\" value=\"1\" type=\"submit\" style=\"height:80px;width:200px\">Turn ON light!</button>");
}
if(cstate) //if currently board is on..
{
cc.println("<button name=\"board\" value=\"c\" type=\"submit\" style=\"height:80px;width:200px\">Turn OFF board!</button>");
}
else
{
cc.println("<button name=\"board\" value=\"b\" type=\"submit\" style=\"height:80px;width:200px\">Turn ON board..</button>");
}
cc.println("<p><center><h3>Much more can be added. Want to automate your home/office? Contact us!</h3></center></p>");
}
void smsalert(int btn)
{
sSerial.print("AT+CMGF=1\r");
delay(300);
sSerial.print("AT+CMGS=\"+1-your-cell-number\"\r");
delay(200);
if(btn==0) //light off button clicked
{
sSerial.print("ALERT: Light turned off!\r");
}
else if(btn == 1)
{
sSerial.print("ALERT: Light turned ON!\r");
}
else if(btn == 2) //board ON
{
sSerial.print("B.ALERT: Board turned ON!\r");
}
else if (btn == 3) //board OFF
{
sSerial.print("B.ALERT: Board turned OFF!\r");
}
delay(100);
sSerial.write(0x1A);
delay(100);
}