This project is all about using an Arduino with an Ethernet shield. I’ll be controlling one LED and a servo, but you can apply this method to control any electronic device you want. (such as DC motors, buzzers, relays, stepper motors, etc..)
The code provided when uploaded and connected to the internet it creates a webserver in your LAN and you simply use the IP to access that webserver through your browser. After that it shows a webpage similar to that one below. When you press the button “Turn On LED” your url will change to: “http://192.168.1.178/?button1on” the arduino will read that information and It turns the LED On.
By default the IP is “192.168.1.178”. That also can be found on the arduino code provided.
Watch this video tutorial
You can use the preceding links or go directly to MakerAdvisor.com/tools to find all the parts for your projects at the best price!
![[Schematics]](https://i0.wp.com/randomnerdtutorials.com/wp-content/uploads/2013/11/Schematics.png?quality=100&strip=all&ssl=1)
/* Created by Rui Santos Visit: https://randomnerdtutorials.com for more arduino projects Arduino with Ethernet Shield */ #include <SPI.h> #include <Ethernet.h> #include <Servo.h> int led = 4; Servo microservo; int pos = 0; byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; //physical mac address byte ip[] = { 192, 168, 1, 178 }; // ip in lan (that's what you need to use in your browser. ("192.168.1.178") byte gateway[] = { 192, 168, 1, 1 }; // internet access via router byte subnet[] = { 255, 255, 255, 0 }; //subnet mask EthernetServer server(80); //server port String readString; void setup() { // Open serial communications and wait for port to open: Serial.begin(9600); while (!Serial) { ; // wait for serial port to connect. Needed for Leonardo only } pinMode(led, OUTPUT); microservo.attach(7); // start the Ethernet connection and the server: Ethernet.begin(mac, ip, gateway, subnet); server.begin(); Serial.print("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 += c; //Serial.print(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(); client.println("<HTML>"); client.println("<HEAD>"); client.println("<meta name='apple-mobile-web-app-capable' content='yes' />"); client.println("<meta name='apple-mobile-web-app-status-bar-style' content='black-translucent' />"); client.println("<link rel='stylesheet' type='text/css' href='https://randomnerdtutorials.com/ethernetcss.css' />"); client.println("<TITLE>Random Nerd Tutorials Project</TITLE>"); client.println("</HEAD>"); client.println("<BODY>"); client.println("<H1>Random Nerd Tutorials Project</H1>"); client.println("<hr />"); client.println("<br />"); client.println("<H2>Arduino with Ethernet Shield</H2>"); client.println("<br />"); client.println("<a href=\"/?button1on\"\">Turn On LED</a>"); client.println("<a href=\"/?button1off\"\">Turn Off LED</a><br />"); client.println("<br />"); client.println("<br />"); client.println("<a href=\"/?button2on\"\">Rotate Left</a>"); client.println("<a href=\"/?button2off\"\">Rotate Right</a><br />"); client.println("<p>Created by Rui Santos. Visit https://randomnerdtutorials.com for more projects!</p>"); client.println("<br />"); client.println("</BODY>"); client.println("</HTML>"); delay(1); //stopping client client.stop(); //controls the Arduino if you press the buttons if (readString.indexOf("?button1on") >0){ digitalWrite(led, HIGH); } if (readString.indexOf("?button1off") >0){ digitalWrite(led, LOW); } if (readString.indexOf("?button2on") >0){ for(pos = 0; pos < 180; pos += 3) // goes from 0 degrees to 180 degrees { // in steps of 1 degree microservo.write(pos); // tell servo to go to position in variable 'pos' delay(15); // waits 15ms for the servo to reach the position } } if (readString.indexOf("?button2off") >0){ for(pos = 180; pos>=1; pos-=3) // goes from 180 degrees to 0 degrees { microservo.write(pos); // tell servo to go to position in variable 'pos' delay(15); // waits 15ms for the servo to reach the position } } //clearing string for next read readString=""; } } } } }
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