Hy,
I'm new in "Arduino world", but I have some ideas, and i come out that Arduino would be the best way for me. OK, I could buy final product or some solution, but that is not the point
I love to learn and discover new things. So, enough my bad English ( I'm from Croatia). My idea and problem is :
I would like to control some relays (pin outout state) over web interface using Arduino.
I suppose that I need Arduino board (uno) + ethernet shield (w5100) + Arduino code (this is my BIG problem) and how to "connect it" with some web page ?
If someone can give me some hit, link, explanation, example or anything, I would appreciate that.
Basic code to control a pin on an arduino via a web page.
//zoomkat 10-6-13
//simple button GET with iframe code
//open serial monitor to see what the arduino receives
//use the ' instead of " in html ilnes
//address will look like http://192.168.1.102:84/ when submited
//for use with W5100 based ethernet shields
#include <SPI.h>
#include <Ethernet.h>
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; //ethernet shield mac address
byte ip[] = { 192, 168, 1, 102 }; // arduino IP in lan
byte gateway[] = { 192, 168, 1, 1 }; // internet access via router
byte subnet[] = { 255, 255, 255, 0 }; //subnet mask
EthernetServer server(84); //server port
String readString;
//////////////////////
void setup(){
 pinMode(4, OUTPUT); //pin selected to control
 //start Ethernet
 Ethernet.begin(mac, ip, gateway, gateway, subnet);
 server.begin();
 //enable serial data print
 Serial.begin(9600);
 Serial.println("servertest1"); // so I can keep track of what is loaded
}
void loop(){
 // Create a client connection
 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;
     //Serial.print(c);
    }
    //if HTTP request has ended
    if (c == '\n') {
     ///////////////
     Serial.println(readString); //print to serial monitor for debuging
     //now output HTML data header
      if(readString.indexOf('?') >=0) { //don't send new page
       client.println("HTTP/1.1 204 Zoomkat");
       client.println();
       client.println();Â
      }
      else {
     client.println("HTTP/1.1 200 OK"); //send new page
     client.println("Content-Type: text/html");
     client.println();
     client.println("<HTML>");
     client.println("<HEAD>");
     client.println("<TITLE>Arduino GET test page</TITLE>");
     client.println("</HEAD>");
     client.println("<BODY>");
     client.println("<H1>Zoomkat's simple Arduino button</H1>");
    Â
     client.println("<a href='/?on1' target='inlineframe'>ON</a>");
     client.println("<a href='/?off' target='inlineframe'>OFF</a>");
     client.println("<IFRAME name=inlineframe style='display:none'>");    Â
     client.println("</IFRAME>");
     client.println("</BODY>");
     client.println("</HTML>");
      }
     delay(1);
     //stopping client
     client.stop();
     ///////////////////// control arduino pin
     if(readString.indexOf("on1") >0)//checks for on
     {
      digitalWrite(4, HIGH);  // set pin 4 high
      Serial.println("Led On");
     }
     if(readString.indexOf("off") >0)//checks for off
     {
      digitalWrite(4, LOW);  // set pin 4 low
      Serial.println("Led Off");
     }
     //clearing string for next read
     readString="";
    }
   }
  }
 }
}
