#include<DHT.h>
#define DHTPIN 2
#define DHTTYPE DHT22
DHT dht(DHTPIN,DHTTYPE);
void setup() 
{
 Serial.begin(9600);
 dht.begin();
 pinMode(4, OUTPUT);
}
void loop() 
{
 float h=dht.readHumidity();
 float t=dht.readTemperature();
 float f=dht.readTemperature(false);
 Serial.print("temp=");
 Serial.print(t);
 Serial.println(" degree C ");
 Serial.print("humidity=");
 Serial.print(h);
 Serial.println(" % ");
 Serial.println(" ");
 delay(2000);
 digitalWrite(4, HIGH);
 delay(1000);
 digitalWrite(4, LOW);
 delay(1000);
}