serra v2.0 arduino controllo valori

#include "DHT.h"
#define DHTPIN 3
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);
#include <EtherCard.h>
int sensorPin = A0;
int sensorValue = 0;

static byte mymac[] = { 0x74,0x69,0x69,0x2D,0x30,0x31 };
static byte myip[] = { 192,168,1,6 };
static byte gwip[] = { 192,168,1,1 };
byte Ethernet::buffer[500];
BufferFiller bfill;

int t=0;
int h=0;
int Timer= 0;
int Animation = 0;

void setup () {
pinMode(sensorPin, INPUT);
  if (ether.begin(sizeof Ethernet::buffer, mymac, 10) == 0)
    Serial.println( "scheda di rete non rilevata");
  ether.staticSetup(myip, gwip);
  dht.begin();
}

static void ReadDHT11()
{
  h = dht.readHumidity();
  t = dht.readTemperature();
}
static word homePage() {
  bfill = ether.tcpOffset();
  bfill.emit_p(PSTR(
  "HTTP/1.0 200 OK\r\n"
    "Content-Type: text/html\r\n"
    "Pragma: no-cache\r\n"
    "\r\n"
    "<meta http-equiv='refresh' content='30'/>"
    "<title>SERRA ARDUINO</title>"
    "<h1>Temperatura: $D C <br>umidita esterna: $D %<br> umidita terreno: $D %</h1>"),
  t, h,A0);
  return bfill.position();
}
void loop () {

    ReadDHT11();

  word len = ether.packetReceive();
  word pos = ether.packetLoop(len);

  if (pos)
    ReadDHT11();
    ether.httpServerReply(homePage());
  }