#include "DHT.h"
#define DHTPIN 4
#define DHTTYPE DHT22   // DHT 22 (AM2302), AM2321

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

void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
  Serial.println(F("Contoh Penggunaan Sensor DHT22!"));
  dht.begin();
  pinMode(led, OUTPUT);
  pinMode(buzzer, OUTPUT);

}
void loop() {
  // put your main code here, to run repeatedly:
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);
  }
}