#include <dht.h> 
dht DHT;
#define DHT11_PIN 2 //pin dht 
#define DHT_LIB_VERSION                 (F("0.1.36"))
#define DHTLIB_OK                       0
#define DHTLIB_ERROR_CHECKSUM           -1
#define DHTLIB_ERROR_TIMEOUT            -2
#define DHTLIB_ERROR_CONNECT            -3
#define DHTLIB_ERROR_ACK_L              -4
#define DHTLIB_ERROR_ACK_H              -5

void setup()
{
Serial.begin(9600); 
Serial.println("DHT11 PROGRAM "); 
Serial.print("LIBRARY VERSION: "); 
//Serial.println(DHT_LIB_VERSION); 
Serial.println();
Serial.println("Type,\tstatus,\tHumidity (%),\tTemperature (C)");
}
void loop()
{
// Membaca data dari DHT 
Serial.print("DHT11, \t");
int chk = DHT.read(DHT11_PIN );
//cek data sensor DHT 
 switch (chk)
{
case DHTLIB_OK: 
Serial.print("OK,\t");
//Setelah di upload selanjutnya buka serial monitor maka akan tampil nilai 
//kelembaban dan suhu.
break;
case DHTLIB_ERROR_CHECKSUM:
Serial.print("Checksum error,\t"); 
break;
case DHTLIB_ERROR_TIMEOUT:
Serial.print("Time out error,\t"); 
break;
case DHTLIB_ERROR_CONNECT:
Serial.print("Connect error,\t"); 
break;
case DHTLIB_ERROR_ACK_L: 
Serial.print("Ack Low error,\t"); 
break;
case DHTLIB_ERROR_ACK_H: 
Serial.print("Ack High error,\t"); 
break;
default:
Serial.print("Unknown error,\t"); 
break;
}
// Menampilkan data dari sensor DHT 
Serial.print(DHT.humidity, 1); 
Serial.print(",\t"); 
Serial.println(DHT.temperature, 1); 
delay(2000);
}