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

// Inisialisasi objek LCD
LiquidCrystal_I2C lcd(0x27, 16, 2); // Alamat I2C untuk LCD 16x2

// Inisialisasi pin untuk LED dan Buzzer
const int ledKuningPin = 17;
const int ledBiruPin = 16;
const int ledMerahPin = 2;
const int buzzerPin = 32;
const int potensiometerPin = 4;

void setup() {
  // Set up pin-mode
  pinMode(ledKuningPin, OUTPUT);
  pinMode(ledBiruPin, OUTPUT);
  pinMode(ledMerahPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  
  // Inisialisasi LCD
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("PWR = 0%");
}

void loop() {
  int potValue = analogRead(potensiometerPin); // Baca nilai potensiometer
  int power = map(potValue, 0, 4095, 0, 100); // Mapping nilai potensiometer ke rentang 0-100
  
  // Tampilkan nilai power di LCD
  lcd.setCursor(6, 0);
  lcd.print("   "); // Membersihkan tampilan sebelum menampilkan nilai baru
  lcd.setCursor(6, 0);
  lcd.print(power);
  lcd.print("% ");
  
  // Mengatur LED dan buzzer sesuai dengan kondisi power
  if (power >= 0 && power <= 30) {
    analogWrite(ledKuningPin, map(power, 0, 30, 0, 255)); // LED kuning
    digitalWrite(ledBiruPin, LOW);
    digitalWrite(ledMerahPin, LOW);
    tone(buzzerPin, map(power, 0, 30, 0, 1000)); // Buzzer volume
    lcd.setCursor(0, 1);
    lcd.print("LED Kuning Hidup ");
  } else if (power > 30 && power <= 70) {
    digitalWrite(ledKuningPin, LOW);
    analogWrite(ledBiruPin, map(power, 30, 70, 0, 255)); // LED biru
    digitalWrite(ledMerahPin, LOW);
    noTone(buzzerPin);
    lcd.setCursor(0, 1);
    lcd.print("LED Biru Hidup    ");
  } else if (power > 70 && power <= 100) {
    digitalWrite(ledKuningPin, LOW);
    digitalWrite(ledBiruPin, LOW);
    analogWrite(ledMerahPin, map(power, 70, 100, 0, 255)); // LED merah
    noTone(buzzerPin);
    lcd.setCursor(0, 1);
    lcd.print("LED Merah Hidup   ");
  }
  
  delay(100); // Delay untuk stabilisasi
}