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

Servo puerta;
LiquidCrystal_I2C lcd(0x27,16,2);

const byte FILAS = 4;
const byte COLUMNAS = 4;

char teclas[FILAS][COLUMNAS] = {
{'1','2','3','A'},
{'4','5','6','B'},
{'7','8','9','C'},
{'*','0','#','D'}
};

byte filas[FILAS] = {D2, D3, D4, D5};
byte columnas[COLUMNAS] = {D6, D7, D8, D9};

Keypad keypad = Keypad(makeKeymap(teclas), filas, columnas, FILAS, COLUMNAS);

String password = "6666";
String input = "";

int led = D11;

void setup(){

pinMode(led, OUTPUT);

puerta.attach(D10);

lcd.init();
lcd.backlight();

lcd.print("Ingrese clave");

puerta.write(0);
}

void loop(){

char tecla = keypad.getKey();

if(tecla){

lcd.setCursor(0,1);
lcd.print(input);

input += tecla;

}

if(input.length() == 4){

if(input == password){

lcd.clear();
lcd.print("Puerta abierta");

digitalWrite(led, HIGH);
puerta.write(90);

delay(3000);

}

else{

lcd.clear();
lcd.print("Clave incorrecta");

delay(2000);

}

input = "";

lcd.clear();
lcd.print("Ingrese clave");

}

}