#include <LiquidCrystal.h>
// This Arduino sketch is a demo to the 'Arduino Keypad' App for Android devices (Both created by installtekz.com)
// Use a virtual keypad over Bluetooth communication as a substitute for the physical hardware kaypad
//
// You are free to do as you wish with this code.
//
// Enter the password: '123' followed by the '#' key to validate the password.
// Open the Serial Monitor to check functionality (Open 'Tools>Serial Monitor' in Arduino IDE) or simply look at the LCD display :)
// '*' will reset your password guess
// ################################################### Incoming Text Strings From The Arduino Keypad App: ##########################################
// 0,1,2,3,4,5,6,7,8,9,A,B,C,D,*,#
// #################################################################################################################################################

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

byte sad[8] = {
        B00000,
        B01010,
        B01010,
        B00000,
        B01110,
        B10001,
        B00000,
        B00000
};

byte tick[8] = {
        B00000,
        B00001,
        B00011,
        B10110,
        B11100,
        B01000,
        B00000,
        B00000
};

 
String inbound;
String password = "123";
String guess = "";


void resetGuess() {
  guess = "";
}


void checkPassword() {
  if (guess == password){
    // Enter your successful password code here..
    Serial.println("CORRECT Password!");
    lcd.setCursor(0,1);
    lcd.print("CORRECT!  ");
    lcd.write(byte(1));
    delay(2000);
    resetGuess();
  }
  else {
    // Enter your failed password code here..
    Serial.println("WRONG Password!");
    lcd.setCursor(0,1);
    lcd.print("WRONG  ");
    lcd.write(byte(0));
    delay(2000);
    resetGuess();
  }
}

  
void setup() {
  Serial.begin(9600);
  lcd.createChar(0, sad);
  lcd.createChar(1, tick);
  lcd.begin(16, 2);
}


void loop() {
  while(Serial.available()) {
    delay(50);
    char c=Serial.read();
    inbound+=c;
    }
  
  if (inbound.length()>0) {
        if (inbound == "#") {
            // Enter
            checkPassword();
          }
          else if (inbound == "*") {
            // Reset
            resetGuess();
          }
          else {
            guess+=inbound;
          }
        Serial.println("Key Pressed: " + inbound + "     Current Guess: " + guess);
        lcd.clear();
        lcd.home();
        lcd.print("Key Pressed: " + inbound);
        inbound="";
  }
}