//C++ Code
// โปรแกรม Lock Somnuek Safe House ด้วย รหัสผ่าน UPDATE LED 4 ดวง (20/2/67 11:43) Solenoid ทำงาน สมบูรณ์ทั้ง Entry และ Exit
#include <Keypad.h> // the library for the 4x4 keypad
#include <LiquidCrystal_I2C.h> // the library for the i2c 1602 lcd
#include <Servo.h> // the library to control the servo motor
//#include <ezLED.h>
LiquidCrystal_I2C lcd(0x27,16,2); // gets the lcd 
Servo servo;

#define Password_Length 5 // the length of the password, if the password is 4 digits long set this to 5
int Position = 0; // position of the servo
char Particular[Password_Length]; // the password length 
char Specific[Password_Length] = "2424"; // the password which is called specific in the code, change this to anything you want with the numbers 0-9 and the letters A-D
byte Particular_Count = 0, Specific_Count = 0; // counts the amount of digits and and checks to see if the password is correct
char Key; 
const byte ROWS = 4; // the amount of rows on the keypad
const byte COLS = 4; // the amount of columns on the keypad
char keys[ROWS][COLS] = { // sets the rowns and columns
  // sets the keypad digits
  {'1','2','3','A'}, 

  {'4','5','6','B'},

  {'7','8','9','C'},

  {'*','0','#','D'}
};
bool SmartDoor = true; // the servo 
// the pins to plug the keypad into
byte rowPins[ROWS] = {7, 6, 5, 4};
byte colPins[COLS] = {3, 2, 1, 0};
Keypad myKeypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS); // gets the data from the keypad

// locked charcater
byte Locked[8] = { 
  B01110,
  B10001,
  B10001,
  B11111,
  B11011,
  B11011,
  B11011,
  B11111
};
// open character
byte Opened[8] = {
  B01110,
  B00001,
  B00001,
  B11111,
  B11011,
  B11011,
  B11011,
  B11111
};

int relay = 11; //Relay เปิดกลอนประตูไฟฟ้า
int ledtrue = 13; // LED สีเขียว แสดงการป้อนรหัสผ่านถูกต้อง
int ledwrong = 9; // LED สีแดง แสดงการป้อนรหัสผ่านผิด
int Exit_switch =12; // Switch เปิดกลอนประตูไฟฟ้าออกจากห้อง
int Myroom;

void setup()
{
  pinMode(relay, OUTPUT);
  pinMode(ledtrue, OUTPUT);
  pinMode(ledwrong, OUTPUT);
  pinMode(Exit_switch, INPUT_PULLUP);
  servo.attach(10); // attaches the servo to pin 10
  lcd.init(); // initializes the lcd 
  lcd.backlight(); // turns on the backlight
  lcd.setCursor(0,0); // sets the cursor on the lcd
  lcd.print("wutSafeHouse"); // prints the text/character
  lcd.setCursor(0,3); // sets the cursor on the lcd
  lcd.print("System Lock!!!!!"); // prints text
  delay(2000); // waits 2 seconds
  lcd.clear(); // clears the lcd display
}

void loop()
{
  if (SmartDoor == 0) // opens the smart door
  {
    Key = myKeypad.getKey(); // the word key = myKeypad which gets the value

    if (Key == '#') // when the '#' key is pressed

    {
      digitalWrite(ledtrue, 0);
      lcd.clear(); // clears the lcd diplay
      lcd.setCursor(2,0); // sets the cursor on the lcd
      lcd.print("Door Closed"); // prints the text to the lcd
      lcd.createChar(0, Locked); // prints the locked character 
      lcd.setCursor(14,0); // sets the cursor on the lcd
      lcd.write(0); // prints the first character when you are on the door closed page
      delay(3000); // waits 3 seconds
      SmartDoor = 1; // closes the door
    }
  }
  else Open(); // keeps the door open
  Exit_Myroom(); // Exit My Room
}

void clearData() // clears the data
{
  while (Particular_Count != 0) // counts the digits pressed
  {
    Particular[Particular_Count--] = 0; // counts how many digits
  }
  return; // returns the data
}


void Exit_Myroom() // function Exit My Room
{
  Myroom = digitalRead(Exit_switch);
  if (!Myroom){
    digitalWrite(relay,HIGH);
    delay(10000);
    digitalWrite(relay, LOW);
  }
}

void Open() // function declarations
{

  lcd.setCursor(1,0); // sets the cursor on the lcd
  lcd.print("Enter Password:"); // prints the text
  
  Key = myKeypad.getKey(); // gets the keys you press from the keypad
  if (Key)
  {
    Particular[Particular_Count] = Key; 
    lcd.setCursor(Particular_Count, 1); // sets the cursor on the lcd
    lcd.print("$"); // prints '*' instead of the password
    Particular_Count++; // counts the length of the password
  }

  if (Particular_Count == Password_Length - 1) // gets the length of the password 
  {
    if (!strcmp(Particular, Specific)) // counts the length and checks to see if the password is correct
    {
      lcd.clear();
      lcd.setCursor(2,0); // sets the cursor on the lcd
      lcd.print("Door Opened");
      digitalWrite(ledtrue, 1);
      digitalWrite(relay, HIGH);
      delay(10000);
      digitalWrite(relay, LOW);
      digitalWrite(ledtrue, 0);
      lcd.createChar(1, Opened);
      lcd.setCursor(14,0); // sets the cursor on the lcd
      lcd.write(1);
      lcd.setCursor(0,1); // sets the cursor on the lcd
      lcd.print("Press # to Close");
      SmartDoor = 0;
    }
    else
    {
      lcd.clear();
      lcd.setCursor(0,0); // sets the cursor on the lcd
      lcd.print("Wrong Password"); // prints the text/character
      lcd.setCursor(0,1);
      lcd.print("Try Again In");
      lcd.setCursor(13,1);
      lcd.print("10");
      digitalWrite(ledwrong, 1);
      delay(1000);
      lcd.setCursor(13,1);
      lcd.print("09");
      digitalWrite(ledwrong, 1);
      delay(1000);
      lcd.setCursor(13,1);
      lcd.print("08");
      digitalWrite(ledwrong, 1);
      delay(1000);
      lcd.setCursor(13,1);
      lcd.print("07");
      digitalWrite(ledwrong, 1);
      delay(1000);
      lcd.setCursor(13,1);
      lcd.print("06");
      digitalWrite(ledwrong, 1);
      delay(1000);
      lcd.setCursor(13,1);
      lcd.print("05");
      digitalWrite(ledwrong, 1);
      delay(1000);
      lcd.setCursor(13,1);
      lcd.print("04");
      digitalWrite(ledwrong, 1);
      delay(1000);
      lcd.setCursor(13,1);
      lcd.print("03");
      digitalWrite(ledwrong, 1);
      delay(1000);
      lcd.setCursor(13,1);
      lcd.print("02");
      digitalWrite(ledwrong, 1);
      delay(1000);
      lcd.setCursor(13,1);
      lcd.print("01");
      digitalWrite(ledwrong, 1);
      delay(1000);
      lcd.setCursor(13,1);
      lcd.print("00");
      digitalWrite(ledwrong, 1);
      delay(1000);
      lcd.clear();
      SmartDoor = 1; // closes the smart door
      digitalWrite(ledwrong, 0);
    }
    clearData(); // clears the data
  }
}