uip_dht11.ino

// UIPEthernet EchoServer example : https://github.com/ntruchsess/arduino_uip
#include <UIPEthernet.h>
EthernetServer server = EthernetServer(80);

// ladyAda DHT11 tutorial http://learn.adafruit.com/dht
#include "DHT.h"
#define DHTPIN 2     
#define DHTTYPE DHT11
// what pin we're connected to ,  pin 1 (on the left) of the sensor to +5V, pin 2 of the sensor to whatever your DHTPIN is, pin 4 (on the right) of the sensor to GROUND, a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor
DHT dht(DHTPIN, DHTTYPE);
float h;
float t;

void temperature ()
{
  // Reading temperature or humidity takes about 250 milliseconds!
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  h = dht.readHumidity();
  t = dht.readTemperature();

  // check if returns are valid, if they are NaN (not a number) then something went wrong!
  if (isnan(t) || isnan(h)) {
    Serial.println("Failed to read from DHT");
  } else {
    Serial.print("Humidity: "); 
    Serial.print(h);
    Serial.print(" %\t");
    Serial.print("Temperature: "); 
    Serial.print(t);
    Serial.println(" *C");
  }  
}

void webserver()
{
  size_t size;

  if (EthernetClient client = server.available())
    {
      while((size = client.available()) > 0)
        {
          uint8_t* msg = (uint8_t*)malloc(size);
          size = client.read(msg,size);
          Serial.write(msg,size);
          free(msg);
        }
      client.println("DATA from Server!");
      client.println("humitat = ");
      client.println(h);      
      client.println("temperatura = ");  
      client.println(t);          
      client.stop();
    }  
}

void setup()
{
  Serial.begin(9600);

  // webserver 
  uint8_t mac[6] = {0x00,0x01,0x02,0x03,0x04,0x05};
  IPAddress myIP(192,168,0,25);
  Ethernet.begin(mac,myIP);
  server.begin();

  // temperatura   
  dht.begin();
}

void loop()
{
  // webserver 
  webserver();  
  
  // temperature
  temperature();
}