#include <DHT.h>

#define DHTPIN 17
#define DHTTYPE DHT22
#define LED_MERAH 16
#define LED_KUNING 18
#define LED_HIJAU 19

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  pinMode(LED_MERAH, OUTPUT);
  pinMode(LED_KUNING, OUTPUT);
  pinMode(LED_HIJAU, OUTPUT);
  dht.begin();
}

void loop() {
  float suhu = dht.readTemperature();
  if (isnan(suhu)) {
    Serial.println("Gagal membaca dari sensor DHT!");
    return;
  }

  Serial.print("Suhu : ");
  Serial.println(suhu);
  digitalWrite(LED_MERAH, LOW);
  digitalWrite(LED_KUNING, LOW);
  digitalWrite(LED_HIJAU, LOW);
  if (suhu <= 20.0) {
    digitalWrite(LED_KUNING, HIGH);
  } 
  else if (suhu > 20.0 && suhu < 32.0) {
    digitalWrite(LED_HIJAU, HIGH);
  } 
  else if (suhu >= 32.0) {
    digitalWrite(LED_MERAH, HIGH);
  }
  delay(2000);
}