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

#define DHTPIN 7      
#define DHTTYPE DHT22 

DHT dht(DHTPIN, DHTTYPE);
#define buzzer 6
#define led_lampu 13
#define led_suhu 12
#define potensio A0
const int sensorIr1 = 10;
const int sensorIr2 = 8;
Servo myservo1;
Servo myservo2;

LiquidCrystal_I2C lcd(0x27,16,2);

unsigned int jumlahOrang;
bool count1 = false;
bool count2 = false;
bool buzzerActive = false;

void setup() {
  lcd.init(); // Gunakan lcd.init() untuk inisialisasi LCD
  lcd.backlight(); // Pastikan backlight dihidupkan
  dht.begin();
  pinMode(led_lampu, OUTPUT);
  pinMode(led_suhu, OUTPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(potensio, INPUT);
  pinMode(sensorIr1, INPUT);
  pinMode(sensorIr2, INPUT);
  myservo1.attach(11);
  myservo2.attach(9);
  jumlahOrang=0;

  lcd.print("Perpustakaan");
  lcd.setCursor(0,1);
  lcd.print("Hari ini");
  digitalWrite(led_lampu, HIGH);
  digitalWrite(led_suhu, LOW);
  digitalWrite(buzzer, LOW);
  delay(2000);

  lcd.clear();
  lcd.print("Ttl Orang:0 /40");
  lcd.setCursor(0,1);
  lcd.print("0 C | 0 db");
  

}

void loop() {
  float suhuC = dht.readTemperature();
  
  int nilaiPotensio=analogRead(potensio);
  lcd.setCursor(0,1);
  lcd.print(suhuC);
  lcd.print(" C | ");
  lcd.print(nilaiPotensio);
  lcd.print(" db");

  unsigned long currentTime = millis(); 

  // jika sensor mendeteksi
  while(digitalRead(sensorIr1) == HIGH ){
    if(jumlahOrang == 5){
      delay(1000);
    }
    else{
      myservo1.write(85);  
      count1 = true;
      delay(1000);
    }
  }
  myservo1.write(5);
  if(count1 == true){
      jumlahOrang ++;
      lcd.setCursor(10,0);
      lcd.print(jumlahOrang);
      count1 = false;
      
    }
  
  while(digitalRead(sensorIr2) == HIGH){
    if(jumlahOrang == 0){
      delay(1000);
    }
    else{
      myservo2.write(85);
      count2 = true;
      delay(1000);
    }
  }
  myservo2.write(5);
  if(count2 == true){
      jumlahOrang --;
      lcd.setCursor(10,0);
      lcd.print(jumlahOrang);
      count2 = false;
      
    }

  // Nyala Lampu
  if(jumlahOrang >0){
    digitalWrite(led_lampu, HIGH);

    // suhu
    if(suhuC >30){
      digitalWrite(led_suhu, HIGH);
    }
    else{
      digitalWrite(led_suhu, LOW);
    }
    
    int frequencies[] = {1000,1200}; // Frekuensi yang digunakan
    int durations[] = {500, 500}; // Durasi setiap frekuensi dalam milidetik 
    if (nilaiPotensio > 50 && !buzzerActive) {
      buzzerActive = true; // Set flag bahwa buzzer sudah berbunyi
      for (int i = 0; i < sizeof(frequencies) / sizeof(frequencies[0]); i++) {
        tone(buzzer, frequencies[i], durations[i]);
        delay(durations[i]); // Memberi sedikit jeda antara setiap frekuensi
      }
    } else if (nilaiPotensio <= 50 && buzzerActive) {
      buzzerActive = false; // Reset flag jika kebisingan turun
      noTone(buzzer);
    }
  }
  else{
    digitalWrite(led_lampu, LOW);
    digitalWrite(led_suhu, LOW);
  }

}