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

// Pin potensiometer (hubungkan ke pin ADC ESP32, misalnya GPIO34)
const int potPin = 34;
int potValue = 0;
int x = 0;        // counter
int state = 0;    // status
int threshold = 2000; // batas deteksi (0–4095 ADC ESP32)

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  Serial.begin(115200); // aktifkan serial monitor
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print(" Parkir Mobil ");
  lcd.setCursor(0, 1);
  lcd.print(x);
  lcd.print(" Mobil Masuk ");
}

void loop() {
  potValue = analogRead(potPin); // baca potensiometer

  // tampilkan nilai ADC real-time
  Serial.print("ADC Value: ");
  Serial.print(potValue);
  Serial.print(" | Mobil: ");
  Serial.println(x);

  if (state == 0) {
    if (potValue > threshold) {
      state = 1;
      x++;
      lcd.setCursor(0, 1);
      lcd.print("                "); // clear baris 2
      lcd.setCursor(0, 1);
      lcd.print(x);
      lcd.print(" Mobil Masuk ");

      // tampilkan juga ketika counter bertambah
      Serial.println(">>> Threshold tercapai, counter++");
    }
  }

  if (potValue < threshold - 200) { // histeresis
    state = 0;
  }

  delay(500); // beri jeda biar data di serial tidak terlalu cepat
}