Za Web Clienta smo uporabili ploščo Arduino duemilanove or Diecimila z Ethernet modulom. Na ploščico smo priključili temperaturni senzor.

/*
  Web client

 This sketch connects to a website (http://www.google.com)
 using an Arduino Wiznet Ethernet shield.

 Circuit:
 * Ethernet shield attached to pins 10, 11, 12, 13

 created 18 Dec 2009
 by David A. Mellis
 modified 9 Apr 2012
 by Tom Igoe, based on work by Adrian McEwen

 */

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

#include <dht.h>

dht DHT;

#define DHT11_PIN 4

// Enter a MAC address for your controller below.
// Newer Ethernet shields have a MAC address printed on a sticker on the shield
byte mac[] = { 0x90, 0xAD, 0xDA, 0x0D, 0x96, 0xFE };
// if you don't want to use DNS (and reduce your sketch size)
// use the numeric IP instead of the name for the server:
//IPAddress server(74,125,232,128);  // numeric IP for Google (no DNS)
//char server[] = "10.190.2.240";    // name address for Google (using DNS)
char server[] = "192.168.1.11";    // name address for Google (using DNS)

// Set the static IP address to use if the DHCP fails to assign
IPAddress ip(192, 168, 1, 89);
//IPAddress ip(10, 190, 2, 220);


// Initialize the Ethernet client library
// with the IP address and port of the server
// that you want to connect to (port 80 is default for HTTP):
EthernetClient client;
String data;

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
  }
  
  Serial.println("DHT TEST PROGRAM ");
  Serial.println("LIBRARY VERSION: ");
  Serial.println(DHT_LIB_VERSION);
  Serial.println();
  Serial.println("Type,\tstatus,\tHumidity (%),\tTemperature (C)");


  // start the Ethernet connection:
  if (Ethernet.begin(mac) == 0) {
    Serial.println("Failed to configure Ethernet using DHCP");
    // no point in carrying on, so do nothing forevermore:
    // try to congifure using IP address instead of DHCP:
    Ethernet.begin(mac, ip);
  }
  // give the Ethernet shield a second to initialize:
  delay(1000);
  Serial.println("connecting...");

  
}

void loop()
{
  
  // READ DATA
  Serial.print("DHT11, \t");
  int chk = DHT.read11(DHT11_PIN);
  switch (chk)
  {
    case DHTLIB_OK:  
		Serial.print("OK,\t"); 
		break;
    case DHTLIB_ERROR_CHECKSUM: 
		Serial.print("Checksum error,\t"); 
		break;
    case DHTLIB_ERROR_TIMEOUT: 
		Serial.print("Time out error,\t"); 
		break;
    default: 
		Serial.print("Unknown error,\t"); 
		break;
  }
 // DISPLAY DATA
  Serial.print(DHT.humidity,1);
  Serial.print(",\t\t");
  Serial.println(DHT.temperature,1);

  data = "temp=";
  data.concat((int)DHT.temperature);
  data.concat("&hum=");
  data.concat((int)DHT.humidity);
  data.concat("&senzor=jedilnica");
  Serial.println(data);
   
  // if you get a connection, report back via serial:
  if (client.connect(server, 80)) {
    Serial.println("connected");
    // Make a HTTP request:
    client.println("GET /meritve/add.php?" + data + " HTTP/1.1");
    //client.println("Host: 10.190.2.240");
    client.println("Host: 192.168.1.11");
    client.println("Connection: close");
    client.println();
  }
  else {
    // kf you didn't get a connection to the server:
    Serial.println("connection failed");
  }
  
  // if there are incoming bytes available
  // from the server, read them and print them:
  if (client.available()) {
    char c = client.read();
    Serial.print(c);
  }
  
  if (client.connected()) { 
		client.stop();	// DISCONNECT FROM THE SERVER
	}

  // if the server's disconnected, stop the client:
  if (!client.connected()) {
    Serial.println();
    Serial.println("disconnecting.");
    client.stop();

  }
  
  delay(300000);
}