#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Keypad.h>
// LiquidCrystal_I2C lcd(0x27,16,2);   //Alamat I2C

int ledPin1 = 5;
int ledPin2 = 18;
int buzzer = 19;

#define TINGGI_LAYAR 64 // Tinggi layar OLED yang digunakan
#define LEBAR_LAYAR 128 // Lebar layar OLED yang digunakan
// int led1 = 5;
// int led2 = 34;
Adafruit_SSD1306 oled(LEBAR_LAYAR, TINGGI_LAYAR, &Wire, -1);

const byte ROWS = 4;    //Jumlah baris keypad
const byte COLS = 4;    //Jumlah kolom keypad

char Keys[ROWS][COLS] = {   //Membuat array keypad
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};


byte rowPins[ROWS] = {13,12,14,27};//connect to the row pinouts of the keypad
byte colPins[COLS] =  {26,25,33,32};

Keypad customKeypad = Keypad( makeKeymap(Keys), rowPins, colPins, ROWS, COLS);    //Masukkan info keypad pada library


char customKey;         //Variabel penampung input keypad
int number = 0;         //Variabel penampung nilai angka
int password = 251199;    //Password

void setup() {
  pinMode(buzzer, OUTPUT);
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  Serial.begin(9600);

  // initialize OLED display with I2C address 0x3C
  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("failed to start SSD1306 OLED"));
    while (1);
  }
  oled.clearDisplay();
  
  tone(buzzer, 5000);
  digitalWrite(ledPin1, HIGH);
  digitalWrite(ledPin2, HIGH);
  delay(200);
  noTone(buzzer);
  digitalWrite(ledPin1, LOW);
  digitalWrite(ledPin2, LOW);
  delay(300); 

  oled.setTextSize(1);         // Atur ukuran text
  oled.setTextColor(WHITE);    // Atur warna text
  oled.setCursor(20, 20);       // Atur posisi text pada display
  oled.print("Selamat Datang"); // Text yang dicetak
  oled.setCursor(30, 30);       // Atur posisi text pada display
  oled.println("Firmansyah"); // Text yang dicetak
  delay(2000);
  oled.display(); 
  oled.clearDisplay();// menampilkan display OLED

}

void loop() {
  oled.setTextSize(1);
  oled.setTextColor(WHITE); 
  oled.setCursor(10,20);
  oled.print("Masukkan Password");      //Tampilan pada layar LCD 
  customKey = customKeypad.getKey();    //Baca input keypad

  //------------Prosedur jika input berupa angka------------//
  switch(customKey){
    case '0' ... '9':
      oled.setTextSize(1);
      oled.setTextColor(WHITE); 
      oled.setCursor(10,30);
      number = number * 10 + (customKey - '0');
      oled.print(number);
      oled.display();
      oled.clearDisplay(); 
    break;

    //------------Jika input '#' maka cek password------------//
    case '#':
      if(number == password){   
          tone(buzzer, 5000);
          digitalWrite(ledPin1, HIGH);
          delay(200);
          noTone(buzzer);
          digitalWrite(ledPin1, LOW);
          delay(300); 
          Serial.println("Silahkan Masuk");  //Jika password benar, maka

        oled.setTextSize(1);
        oled.setTextColor(WHITE); 
        oled.setCursor(10,30);
        oled.print("Silahkan Masuk");  //Tampilan Oled
        number = 0;
        oled.display();
        oled.clearDisplay(); 
       
      }
      else{     
          tone(buzzer, 1000);
          digitalWrite(ledPin2, HIGH);
          delay(200);
          noTone(buzzer);
          digitalWrite(ledPin2, LOW);
          delay(300); 
          tone(buzzer, 1000);
          digitalWrite(ledPin2, HIGH);
          delay(200);
          noTone(buzzer);
          digitalWrite(ledPin2, LOW);
          delay(300); 
          tone(buzzer, 1000);
          digitalWrite(ledPin2, HIGH);
          delay(200);
          noTone(buzzer);
          digitalWrite(ledPin2, LOW);
          delay(300); 
      
        
        Serial.println("Password Salah");                 //Jika salah, maka
        
        oled.setTextSize(1);
        oled.setTextColor(WHITE); 
        oled.setCursor(10,30);
        oled.print("Password Salah");  //Tampilan Oled
        oled.display();
        delay(2000);
        number = 0;
        oled.clearDisplay();
        
        
      }
    break;

    //------------Jika input '*' maka hapus tampilan------------//
    case '*':
       number = 0;
      oled.clearDisplay();
      oled.setTextSize(1);
      oled.setCursor(10, 20);
      oled.print("Masukkan Password");
      oled.display();
      delay(100);
      oled.clearDisplay();
    break;
  }
}/* Program Kunci Pintu dengan password input Keypad 4x4 dibuat oleh Indobot */