#include "DHT.h"

#define DHTPIN 19       
#define DHTTYPE DHT22   

#define LED_MERAH 14
#define LED_KUNING 18
#define LED_HIJAU 21

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  
  dht.begin();

  pinMode(LED_MERAH, OUTPUT);
  pinMode(LED_KUNING, OUTPUT);
  pinMode(LED_HIJAU, OUTPUT);
}

void loop() {
  delay(2000);

  float t = dht.readTemperature();

  if (isnan(t)) {
    Serial.println("Gagal membaca data dari sensor DHT!");
    return;
  }

  Serial.print("Suhu saat ini: ");
  Serial.print(t);
  Serial.println(" °C");

  if (t >= 0 && t <= 10) {
    Serial.println("Status: LED MERAH ON");
    digitalWrite(LED_MERAH, HIGH);
    digitalWrite(LED_KUNING, LOW);
    digitalWrite(LED_HIJAU, LOW);
  } 
  else if (t > 10 && t <= 20) {
    Serial.println("Status: LED KUNING ON");
    digitalWrite(LED_MERAH, LOW);
    digitalWrite(LED_KUNING, HIGH);
    digitalWrite(LED_HIJAU, LOW);
  } 
  else if (t > 20 && t <= 30) {
    Serial.println("Status: LED HIJAU ON");
    digitalWrite(LED_MERAH, LOW);
    digitalWrite(LED_KUNING, LOW);
    digitalWrite(LED_HIJAU, HIGH);
  } 
  else {
    Serial.println("Status: Suhu di luar jangkauan (Semua LED OFF)");
    digitalWrite(LED_MERAH, LOW);
    digitalWrite(LED_KUNING, LOW);
    digitalWrite(LED_HIJAU, LOW);
  }
}