#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define POT_PIN 34         // Pin potensiometer
#define TRIG_PIN 25        // Pin Trig HC-SR04
#define ECHO_PIN 26        // Pin Echo HC-SR04
#define RELAY1_PIN 27      // Pin Relay 1 untuk Vacuum Fan 1
#define RELAY2_PIN 33      // Pin Relay 2 untuk Vacuum Fan 2
#define BUZZER_PIN 32      // Pin Buzzer

LiquidCrystal_I2C lcd(0x27, 16, 2); // Alamat I2C untuk LCD

// Variabel threshold
const int dustThreshold = 700; // Nilai kualitas udara (potensiometer)
const int ultrasonicThreshold = 10; // Jarak maksimal (cm)

void setup() {
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(RELAY1_PIN, OUTPUT);
  pinMode(RELAY2_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);

  lcd.init();
  lcd.backlight();

  Serial.begin(115200);
}

void loop() {
  // Baca potensiometer sebagai simulasi sensor debu
  int dustValue = analogRead(POT_PIN);

  // Baca jarak ultrasonik
  float distance = getUltrasonicDistance();

  // Tampilkan di LCD
  lcd.setCursor(0, 0);
  lcd.print("Dust: ");
  lcd.print(dustValue);
  lcd.setCursor(0, 1);
  lcd.print("Dist: ");
  lcd.print(distance);
  lcd.print(" cm");

  // Logika kontrol untuk Vacuum Fan 1 Vacuum Fan 2
  if (dustValue > dustThreshold) {
    digitalWrite(RELAY1_PIN, HIGH); // Nyalakan Vacuum Fan 1
    digitalWrite(RELAY2_PIN, HIGH); // Nyalakan Vacuum Fan 2
    digitalWrite(BUZZER_PIN, HIGH); // Buzzer berbunyi sekali
    delay(500);
    digitalWrite(BUZZER_PIN, LOW);
  } else {
    digitalWrite(RELAY1_PIN, LOW); // Matikan Vacuum Fan 1
    digitalWrite(RELAY2_PIN, LOW); // Matikan Vacuum Fan 2
  }

  // Logika kontrol untuk Vacuum Fan 2
  if (distance < ultrasonicThreshold) {
    // Jika box penuh, bunyikan buzzer berkali-kali
    for (int i = 0; i < 3; i++) {
      digitalWrite(BUZZER_PIN, HIGH);
      delay(200);
      digitalWrite(BUZZER_PIN, LOW);
      delay(200);
    }
  } else {
    digitalWrite(RELAY1_PIN, LOW); // Matikan Vacuum Fan 1
    digitalWrite(RELAY2_PIN, LOW); // Matikan Vacuum Fan 2
  }

  delay(1000); // Delay 1 detik
}

float getUltrasonicDistance() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);

  long duration = pulseIn(ECHO_PIN, HIGH);
  float distance = (duration * 0.0343) / 2; // Convert to cm
  return distance;
}