#include "DHT.h"
#define DHTPIN 4     
#define DHTTYPE DHT22 
DHT dht(DHTPIN, DHTTYPE);
int led_do=2;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  dht.begin();
  pinMode(led_do, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
 float t = dht.readTemperature();
 digitalWrite(led_do, HIGH);
 Serial.println(t);
 delay(1000);
}