#include "DHT.h"
#define DHTPIN 4
#define DHTTPYE DHT22  // DHT22  (AM2302), AM2321

DHT dht(DHTPIN, DHTTPYE);
int led = 2;
int buzzer = 3;


void setup() {
Serial.begin(9600);
Serial.println(F(" Penggunaan Sensor DHT22!"));
dht.begin();
pinMode(led, OUTPUT);
pinMode(buzzer, OUTPUT);

}

void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  Serial.print(F("Humidity: "));
  Serial.print(humidity);
  Serial.print(F("%  Temperature:  "));
  Serial.print(temperature);
  Serial.println(F("°C "));

  // Wait a few seconds between measurements.
  delay(2000);

  if (temperature <21){
    digitalWrite(led, HIGH);
    digitalWrite(buzzer, HIGH);
    delay(1000);
  }
  if(temperature >21){
    digitalWrite(led, LOW);
  }  
}