#define pinServo1 3
#define pinServo2 4
#define pinTombol 5
#define pinLED    6
#define pinLDR    A0

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

Servo servo1;
Servo servo2;

LiquidCrystal_I2C lcd(0x27, 16, 2);

unsigned long previousMillis = 0;
const long interval = 1000; //1000ms
uint8_t count = 0, uangMasuk = 0; //unsigned integer 8bit

void setup()
{
  // inisialisasi
  lcd.begin(16,2);
  servo1.attach(pinServo1);
  servo2.attach(pinServo2);
  pinMode(pinLDR, INPUT);
  pinMode(pinTombol, INPUT);
  pinMode(pinLED, OUTPUT);

  lcd.clear();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Vending  Machine");
  lcd.setCursor(0, 1);
  lcd.print("     Jepang     ");
  delay(1000);

  servo1.write(0);
  servo2.write(0);
  delay(1000);

  lcd.setCursor(0, 0);
  lcd.print("Silahkan Masukan");
  lcd.setCursor(0, 1);
  lcd.print("   Uang  Anda   ");
  delay(1000);

//  servo1.write(90);
//  delay(1000);
//  servo2.write(45);
//  delay(1000);
}

void loop()
{
  unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
    
    switch (uangMasuk) {
      case 1:
        count = 0;
        lcd.setCursor(0, 0);
        lcd.print("Silahkan Pilih  ");
        lcd.setCursor(0, 1);
        lcd.print("Barangnya       ");
        break;

      case 2:
        servo2.write(180);
        digitalWrite(pinLED, HIGH);
        delay(2000);
        lcd.setCursor(0, 0);
        lcd.print("Silahkan Ambil  ");
        lcd.setCursor(0, 1);
        lcd.print("Barangnya       ");
        servo2.write(0);
        digitalWrite(pinLED, LOW);
        delay(3000);
        uangMasuk = 0;
        break;

      default:
        count++;
        break;
    }

    if (count <= 5 && count > 0) {
      lcd.setCursor(0, 0);
      lcd.print("Vending  Machine");
      lcd.setCursor(0, 1);
      lcd.print("     Jepang     ");
    }
    if (count > 5) {
      lcd.setCursor(0, 0);
      lcd.print("Silahkan Masukan");
      lcd.setCursor(0, 1);
      lcd.print("   Uang  Anda   ");
    }
    if (count >= 10)
      count = 0;
  }

  if (!digitalRead(pinLDR) && uangMasuk == 0) {
    lcd.setCursor(0, 0);
    lcd.print("Uang Terdeteksi ");
    lcd.setCursor(0, 1);
    lcd.print("Rp. 15.000,-    ");
    servo1.write(90);
    delay(2000);
    servo1.write(0);
    uangMasuk = 1;
  }

  if (digitalRead(pinTombol) && uangMasuk == 1) {
    uangMasuk = 2;
  }
}