#include "DHT.h"

#define DHTPIN 15     // Pin data DHT22
#define DHTTYPE DHT22 // Tipe sensor DHT22
#define BUZZER_PIN 13 // Pin kontrol buzzer
#define RELAY_PIN 14  // Pin kontrol relay
#define LED_PIN 12    // Pin kontrol LED (jika tidak menggunakan relay untuk LED)

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(RELAY_PIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);
  digitalWrite(BUZZER_PIN, LOW); // Matikan buzzer pada awalnya
  digitalWrite(RELAY_PIN, LOW);  // Matikan relay pada awalnya
  digitalWrite(LED_PIN, LOW);    // Matikan LED pada awalnya
  dht.begin();
}

void loop() {
  // Baca suhu dari DHT22
  float temperature = dht.readTemperature();

  // Cek jika pembacaan gagal
  if (isnan(temperature)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  // Cetak nilai suhu ke Serial Monitor
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" *C ");

  // Aktifkan buzzer, relay, dan LED jika suhu melebihi 30°C
  if (temperature > 30) {
    Serial.println("Temperature exceeds 30°C - Buzzer ON, Relay ON, LED ON");
    tone(BUZZER_PIN, 262, 250); // Frekuensi 262 Hz, durasi 250 ms
    digitalWrite(RELAY_PIN, HIGH); // Aktifkan relay
    digitalWrite(LED_PIN, HIGH);   // Hidupkan LED (jika LED tidak melalui relay)
  } else {
    Serial.println("Temperature below 30°C - Buzzer OFF, Relay OFF, LED OFF");
    noTone(BUZZER_PIN); // Matikan buzzer
    digitalWrite(RELAY_PIN, LOW);  // Matikan relay
    digitalWrite(LED_PIN, LOW);    // Matikan LED (jika LED tidak melalui relay)
  }

  delay(2000); // Tunggu 2 detik sebelum pembacaan berikutnya
}