#include <DHT.h>

#define DHTPIN 4          // Pin data sensor DHT
#define DHTTYPE DHT22     // Jenis sensor DHT

DHT dht(DHTPIN, DHTTYPE);

#define trigPin 6
#define echoPin 5
#define relayPin1 2
#define relayPin2 3
#define ledPin 7
#define buzzerPin 8

long duration;
int distance;
int distanceThreshold = 10; // Jarak threshold untuk mengaktifkan relay dan lampu LED (dalam cm)

void setup() {
  Serial.begin(9600);
  dht.begin();
  pinMode(relayPin1, OUTPUT);
  pinMode(relayPin2, OUTPUT);
  pinMode(ledPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
}

void loop() {
  // Sensor Jarak
  digitalWrite(trigPin, LOW); // Kirim sinyal ultrasonik
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH); // Hitung waktu pantulan
  distance = duration * 0.034 / 2; // Hitung jarak

  Serial.print("Distance: ");
  Serial.println(distance);

  if (distance < distanceThreshold) { // Jika jarak kurang dari threshold
    digitalWrite(relayPin2, HIGH); // Aktifkan relay kedua
    digitalWrite(ledPin, HIGH); // Nyalakan lampu LED
    delay(1000);
  } else {
    digitalWrite(relayPin2, LOW); // Matikan relay kedua
    digitalWrite(ledPin, LOW); // Matikan lampu LED
  }

  // Sensor Suhu
  float temperature = dht.readTemperature(); // Baca suhu

  Serial.print("Temperature: ");
  Serial.println(temperature);

  if (temperature < 20 || temperature > 30) { // Jika suhu di luar rentang
    digitalWrite(relayPin1, HIGH); // Aktifkan relay pertama
    tone(buzzerPin, 200); // Bunyikan buzzer
    delay(1000);
    noTone(buzzerPin);
  } else {
    digitalWrite(relayPin1, LOW); // Matikan relay pertama
    noTone(buzzerPin); // Pastikan buzzer mati
  }

  delay(1000); // Delay untuk mengurangi frekuensi pembacaan sensor
}