#include <LiquidCrystal_I2C.h>
#include "pitches.h"
#define I2C_ADDR    0x27
#define LCD_COLUMNS 16
#define LCD_LINES   2
#define SPEAKER_PIN 2 

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);
// Deklarasi pin
const int ldrPin1 = A0;    
const int ldrPin2 = A1;
const int ledPin3 = 9;
const int ledPin2 = 8; 
const int ledPin1 = 7;    
const int threshold = 500; 

void setup() {
  // Inisialisasi pin LED sebagai output
  pinMode(ledPin3, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(ledPin1, OUTPUT);
  pinMode(SPEAKER_PIN, OUTPUT);
  lcd.init();
  lcd.backlight();
  // Inisialisasi komunikasi serial
  Serial.begin(9600);
}

void loop() {
  // Membaca nilai dari pin LDR
  int ldr1Value = analogRead(ldrPin1);
  int ldr2Value = analogRead(ldrPin2);

  // Mengirim nilai LDR ke Serial Monitor
  Serial.print("Nilai LDR1: ");
  Serial.println(ldr1Value);
  Serial.print("Nilai LDR2: ");
  Serial.println(ldr2Value);

  // Mengecek apakah nilai LDR lebih rendah dari ambang batas
  if ((ldr1Value > threshold) || (ldr2Value > threshold)) {
    // Menyalakan LED
    digitalWrite(ledPin3, HIGH);
    digitalWrite(ledPin2, LOW);
    digitalWrite(ledPin1, HIGH);
  } else {
    // Mematikan LED
    digitalWrite(ledPin3, LOW);
    digitalWrite(ledPin2, HIGH);
    digitalWrite(ledPin1, LOW);
  }
  if ((ldr1Value > threshold)) {
    lcd.setCursor(1,0);
    lcd.print("in1=off");
  } else {
    lcd.setCursor(1,0);
    lcd.print("in1=on ");
  }
  if ((ldr2Value > threshold)) {
    lcd.setCursor(9,0);
    lcd.print("in2=off");
  } else {
    lcd.setCursor(9,0);
    lcd.print("in2=on ");
  }
  if ((ldr1Value < threshold) && (ldr2Value < threshold)) {
    lcd.setCursor(3,1);
    lcd.print("output=on ");
  } else {
    lcd.setCursor(3,1);
    lcd.print("output=off");
  }
   if ((ldr1Value < threshold) && (ldr2Value < threshold)) {
   tone(SPEAKER_PIN, 50, 200);
   delay(500);  
  } else {
    noTone(SPEAKER_PIN);
  }
  // Tunggu selama 100ms sebelum pembacaan berikutnya
  delay(100);
  
}