How to setup an Ethernet Shield on an Arduino and a Webserver to control an LED:
by J.B. Wylzan
Project 29: Ethernet Web Server
This project shows how to set up the Arduino Ethernet Shield,
design a simple HTML code, and use the site to control an LED and a relay.
design a simple HTML code, and use the site to control an LED and a relay.
 |
| The Ethernet Shield |
 |
| The Web Server |
 |
| The Relay |
ethernet shield
relays
leds
resistors
connecting wires
breadboard
Arduino R3 UNO board
Block Diagram:
Replace the servo with a relay instead.
Code # 29:
Project #29: 2 Channels 5V Relay Shield
Author: J. B. Wylzan with some help from the Arduino community
Website: http://www.ihacklab.blogspot.com
Abstract: Control relays via an ethernet web server.
================================================================== */
#include <SPI.h>
#include <Ethernet.h>
#define CH1 6
#define CH2 7
#define gLed 8
#define rLed 9
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; //Your mac address
byte ip[] = { 192, 168, x, x }; //Your ip address
byte gateway[] = { 192, 168, x, x }; //Your gateaway address
byte subnet[] = { 255, 255, x, x }; //Your subnet address
EthernetServer server(80); //Your server port
String readString;
void setup() {
Serial.begin(9600);
pinMode(CH1, OUTPUT);
pinMode(CH2, OUTPUT);
pinMode(gLed, OUTPUT);
pinMode(rLed, OUTPUT);
//Provide power to both LEDs
digitalWrite(gLed, HIGH);
digitalWrite(rLed, HIGH);
//Turn OFF any power to the Relay channels
digitalWrite(CH1,LOW);
digitalWrite(CH2,LOW);
delay(2000);
// start the Ethernet connection and the server:
Ethernet.begin(mac, ip, gateway, subnet);
server.begin();
Serial.print("my server is at ");
Serial.println(Ethernet.localIP());
}
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 = readString + c;
}
//if HTTP request has ended
if (c == '\n') {
Serial.println(readString);
client.println("HTTP/1.1 200 OK"); //start of your HTML
client.println("Content-Type: text/html");
client.println();
client.println("<!DOCTYPE HTML>");
client.println("<HTML>");
client.println("<HEAD>");
client.println("<TITLE>iHackLab</TITLE>");
client.println("</HEAD>");
client.println("<center>");
client.println("<H1>IHackLab Homotronics Website</H1>");
client.println("<hr />");
client.println("<br />");
client.println("<H2>Automation using Arduino Ethernet Shield</H2>");
client.println("<br />");
client.println("<a href=\"/stp\"\">Deactivate</a><br />");
client.println("<br />");
client.println("<br />");
client.println("<a href=\"/one\"\">Activate Relay 1</a><br />");
client.println("<br />");
client.println("<br />");
client.println("<a href=\"/two\"\">Activate Relay 2</a><br />");
client.println("<br />");
client.println("<br />");
client.println("<a href=\"/bth\"\">Activate Both Relays 1, 2</a><br />");
client.println("<br />");
client.println("<br />");
client.println("<br />");
client.println("<br />");
client.println("<hr />");
client.println("www.thearduinosketch.blogspot.com/>");
client.println("<hr />");
client.println("<br />");
client.println("</center>");
client.println("</BODY>");
client.println("</HTML>"); //end of your HTML
delay(1);
//stopping client
client.stop();
if (readString.indexOf("one") >0){
Serial.println("Relay 1");
digitalWrite(CH1, HIGH);
delay(1000);
digitalWrite(CH1, LOW);
delay(1000);
}
if (readString.indexOf("two") >0){
Serial.println("Relay 2");
digitalWrite(CH2, HIGH);
delay(1000);
digitalWrite(CH2, LOW);
delay(1000);
}
if (readString.indexOf("bth") >0){
Serial.println("Relays 1,2");
digitalWrite(CH1, HIGH);
delay(1000);
digitalWrite(CH1, LOW);
delay(1000);
digitalWrite(CH2, HIGH);
delay(1000);
digitalWrite(CH2, LOW);
delay(1000);
}
if (readString.indexOf("stp") >0){
Serial.println("Deactivate");
digitalWrite(CH1,HIGH);
digitalWrite(CH2,HIGH);
digitalWrite(gLed, LOW);
digitalWrite(rLed, LOW);
delay(1000);
}
readString="";
}
}
}
}
}
/* =============================================================== */
Challenge:
Make a sketch that will turn On and Off any appliances in your house controlled by your webserver.
Procedure:
1. Build the prototype as shown above
2. Run the Arduino Interface
3. Select File > New
4. Copy Code #29 above
5. Paste Code #29
6. Click File > Save
7. Click Verify
8. Click Upload
9. Type your ip address on the url slot
10. Click On or Off to activate the relay and the led
Disclaimer: We shall not be liable for any loss or damage of whatever nature - direct, indirect, consequential, or otherwise - which may arise as a result of your use of any information on this website. However, if you are interested in using any of the projects for personal or educational purposes, please inform the author by email.
Public Domain Notice: Copyright (c) 2000. All rights reserved. This article is part of a book entitled iHackRobot. Copies are welcome to be shared or distributed publicly as long proper citations are observed. Please cite as follows: Biotronics: The Silver Species, Joey Lawsin, 1988, USA.
==================================================================
Patent Pending. 2000 © ®
A L.A.W.S.I.N. Educational Production
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