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Topic: NEED HELP USING THE ETHERNET SHIELD (Read 597 times) previous topic - next topic


i am not new to the ethernet shield.. i already know how to use the digital I/O pins to run some relays using visual studio as my uI.. now i want to to the same but with ethernet shield so i could control relays via internet... i dont know where to start and where will i end.. could someone give me the steps i needed to do.. i just want to do the same as those who place ther videos in the youtube using ethernet shield.. sorry but its only months since i started in learning arduino.. a reply will be really appreciated.. thank you


Have a look at the Ethernet shield tutorials:

It is also worth reading a bit about tcp/udp (the two main protocols for communicating over Ethernet) to get a better understanding of how these programs work.

You will obviously need some software running on your pc as , if you want to use a web browser to do it, then the webserver tutorial is going to be useful, you may find it easier at first though to build a very simple udp client on your pc and send commands with that (the implementation for this is much shorter).


Some simple web page control test code.

Code: [Select]

//zoomkat 4-1-12
//simple button GET for servo and pin 5
//for use with IDE 1.0
//open serial monitor to see what the arduino receives
//use the \ slash to escape the " in the html, or use ' instead of "
//address will look like when submited
//for use with W5100 based ethernet shields

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

#include <Servo.h>
Servo myservo;  // create servo object to control a servo

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; //physical mac address
byte ip[] = { 192, 168, 1, 102 }; // 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(5, OUTPUT); //pin selected to control
  //start Ethernet
  Ethernet.begin(mac, ip, gateway, gateway, subnet);

  myservo.write(90); //set initial servo position if desired
  myservo.attach(7);  //the pin for the servo control
  //enable serial data print
  Serial.println("server servo/pin 5 test 1.0"); // 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;

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

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

          client.println("HTTP/1.1 200 OK"); //send new page
          client.println("Content-Type: text/html");

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

          client.println("<H1>Zoomkat's simple Arduino button</H1>");
          client.println("<a href=\"/?on\">ON</a>");
          client.println("<a href=\"/?off\">OFF</a>");


          //stopping client

          ///////////////////// control arduino pin
          if(readString.indexOf("on") >0)//checks for on
            digitalWrite(5, HIGH);    // set pin 5 high
            Serial.println("Led On");
          if(readString.indexOf("off") >0)//checks for off
            digitalWrite(5, LOW);    // set pin 5 low
            Serial.println("Led Off");
          //clearing string for next read


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i just logged in sir.. thank you for the code.. i will try it now.. with ethernet shield using ur LAN ip, can i open that address form another browser with different network? cause what im thinking is that i can control my arduino via internet right? so is it like that i can control it around the world? thank you for a reply

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