Basic Web Server

This was the first code I found to make my Arduino Ethernet do something via a web browser. I was so excited. My microcontroller could talk via ethernet!


Remember to change the MAC address and IP addresses! The MAC address should be printed on the back of your Arduino Ethernet. The IP address should definitely be in the proper range for your network.

This code was swiped originally from the internet. The original creators are listed in the code.
[php]

/*
Web Server

A simple web server that shows the value of the analog input pins.
using an Arduino Wiznet Ethernet shield.

Circuit:
* Ethernet shield attached to pins 10, 11, 12, 13
* Analog inputs attached to pins A0 through A5 (optional)

created 18 Dec 2009
by David A. Mellis
modified 4 Sep 2010
by Tom Igoe

*/

#include <spi.h>
#include <ethernet.h>

// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = { 0x90, 0xA2, 0xDA, 0x00, 0x72, 0xA2 };
IPAddress ip(192,168,1, 177);

// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(80);

void setup()
{
// start the Ethernet connection and the server:
Ethernet.begin(mac, ip);
server.begin();
}

void loop()
{
// listen for incoming clients
EthernetClient client = server.available();
if (client) {
// an http request ends with a blank line
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) {
char c = client.read();
// if you’ve gotten to the end of the line (received a newline
// character) and the line is blank, the http request has ended,
// so you can send a reply
if (c == ‘n’ && currentLineIsBlank) {
// send a standard http response header
client.println(“HTTP/1.1 200 OK”);
client.println(“Content-Type: text/html”);
client.println();

client.print(“”);

// output the value of each analog input pin
for (int analogChannel = 0; analogChannel < = 5; analogChannel++) {
client.print(“analog input “);
client.print(analogChannel);
client.print(” is “);
client.print(analogRead(analogChannel));
client.println(”
“);
}

// output the value of each digital input pin
for (int digitalChannel = 0; digitalChannel < = 13; digitalChannel++) {
client.print(“digital input “);
client.print(digitalChannel);
client.print(” is “);
client.print(digitalRead(digitalChannel));
client.println(”
“);
}
break;
}
if (c == ‘n’) {
// you’re starting a new line
currentLineIsBlank = true;
}
else if (c != ‘r’) {
// you’ve gotten a character on the current line
currentLineIsBlank = false;
}
}
}
// give the web browser time to receive the data
delay(1);
// close the connection:
client.print(“”);
client.stop();
}
}
[/php]

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Author: Helicopter Jeff

I'm a vinyl decal cutting and designing, Astrophotography and general photography capturing, RC helicopter/quad copter pilot, Arduino and Raspberry Pi hardware/software developer, network, scripting and troubleshooting ninja living in the metro NY area. I am passionate about my hobbies so much I do them for a living. There's nothing better than getting paid to do what you love.

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