#include <Wire.h> // Incluimos la libreria Wire
#include <Keypad.h> // Incluimos la libreria keypad
#include <RTClib.h> // Incluimos la libreria RTClib

int ledrojo = 12; // Asociamos el Led Rojo al pin 12
int ledverde = 13; // Asociamos el Led Rojo al pin 11

int piezo = A0; // Asociamos el Buzzer con el pin A0 de la placa arduino


const byte ROWS = 4; // Declaramos 4 filas
const byte COLS = 3; // Declarampos 3 columnas
char keys[ROWS][COLS] = {
  { '1', '2', '3'},
  { '4', '5', '6'},
  { '7', '8', '9'},
  { ' ', '0', ' '}
};  

byte colPins[COLS] = { 5, 4, 3}; // Pins conectados a C1, C2, C3, C4
byte rowPins[ROWS] = { 9, 8, 7, 6 }; // Pins conectados a R1, R2, R3, R4

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

char i [4] = {0,0,0,0}; // Declaramos una matriz de cuatro variables y las inicializamos a 0. Esta variable "i" almacenará la combinación de números

char key=0; // Variable que contendrá cada uno de los dígitos introducidos desde el teclado.

char j=0; // Variable que nos ayudará a recorrer cada posición de la variable array i

int cont = 0; // Variable encargada de contar sólo que solo introducimos cuatro números para el pin

RTC_DS1307 rtc;

char daysOfTheWeek[7][12] = {"Domingo", "Lunes", "Martes", "Miércoles", "Jueves", "Viernes", "Sábado"}; // Declaramos los dias de la semana


  void setup() {
    Wire.begin(); // Iniciamos el Wire
    rtc.begin(); // Iniciamos el RTC
    rtc.adjust(DateTime(__DATE__, __TIME__)); // Ajustamos la fecha y la hora a la de nuestra màquina
    Serial.begin(9600); // Iniciamos el puerto serie  

    pinMode(ledrojo, OUTPUT); // Establecemos el pin 12 como la salida
    pinMode(ledverde, OUTPUT); // Establecemos el pin 11 como la salida
    
    if (! rtc.begin()) {
    Serial.println("Couldn't find RTC"); //  Declaramos que nos avise en caso de no encontrar ningun RTC
    Serial.flush();
    abort();
    
  }
  }

  void loop() {
    while (cont < 4){ // Mientras el contador sea menor que 4

    key = keypad.getKey(); // La variable key almacena las teclas pulsadas

    i[j]= key; // Almacenamos las teclas que recoge key en cada posición de nuestra variable array i. j es aqui cada posicion del array

    DateTime now = rtc.now();

  if (key){ 
    Serial.print("* "); // Se imprime la primera tecla pulsada

    j=j+1; // Incrementamos la variable indice j

    cont = cont + 1; // Incrementamos la variable de numeros introducidos

    }
  }

// CONTRASEÑA 1 

  if (i[0] == '1' && i[1] == '6' && i[2] == '7' && i[3] == '9'){

    Serial.println("CONTRASEÑA CORRECTA!!");
    i[0] = 0;
    i[1] = 0;
    i[2] = 0;
    i[3] = 0;
    Serial.println("Bienvenido Martín Del Río González");
    Serial.println("Identificador: 001");

    DateTime now = rtc.now();
    Serial.print("Hora actual: ");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(" ");
    Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(" (");
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();

    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(5000);
    digitalWrite(ledverde, LOW);

  }




// CONTRASEÑA 2

  else{
    if(i[0] == '1' && i[1] == '7' && i[2] == '2' && i[3] == '5' ){

    Serial.println("CONTRASEÑA CORRECTA!!");
    i[0] = 0;
    i[1] = 0;
    i[2] = 0;
    i[3] = 0;
    Serial.println("Bienvenido Benito Martinez Ocasio");
    Serial.println("Identificador: 002");

    DateTime now = rtc.now();
    Serial.print("Hora actual: ");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(" ");
    Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(" (");
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();

    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(5000);
    digitalWrite(ledverde, LOW);
    }

// CONTRASEÑA 3

  else{
    if(i[0] == '0' && i[1] == '8' && i[2] == '4' && i[3] == '3' ){

    Serial.println("CONTRASEÑA CORRECTA!!");
    i[0] = 0;
    i[1] = 0;
    i[2] = 0;
    i[3] = 0;
    Serial.println("Bienvenido Gabriel Mora Quintero");
    Serial.println("Identificador: 003");

    DateTime now = rtc.now();
    Serial.print("Hora actual: ");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(" ");
    Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(" (");
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();

    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(5000);
    digitalWrite(ledverde, LOW);
    }

// CONTRASEÑA 4

  else{
    if(i[0] == '6' && i[1] == '9' && i[2] == '6' && i[3] == '9' ){

    Serial.println("CONTRASEÑA CORRECTA!!");
    i[0] = 0;
    i[1] = 0;
    i[2] = 0;
    i[3] = 0;
    Serial.println("Bienvenido Didac Soldevila Margall");
    Serial.println("Identificador: 004");

    DateTime now = rtc.now();
    Serial.print("Hora actual: ");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(" ");
    Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(" (");
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();

    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(5000);
    digitalWrite(ledverde, LOW);
    }







// CONTRASEÑA 5

  else{
    if(i[0] == '3' && i[1] == '6' && i[2] == '0' && i[3] == '2' ){

    Serial.println("CONTRASEÑA CORRECTA!!");
    i[0] = 0;
    i[1] = 0;
    i[2] = 0;
    i[3] = 0;
    Serial.println("Bienvenido Emmanuel Gazmey Santiago");
    Serial.println("Identificador: 005");

    DateTime now = rtc.now();
    Serial.print("Hora actual: ");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(" ");
    Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(" (");
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();

    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(5000);
    digitalWrite(ledverde, LOW);
    }








// CONTRASEÑA 6

  else{
    if(i[0] == '2' && i[1] == '6' && i[2] == '4' && i[3] == '5' ){

    Serial.println("CONTRASEÑA CORRECTA!!");
    i[0] = 0;
    i[1] = 0;
    i[2] = 0;
    i[3] = 0;
    Serial.println("Bienvenido Gerard Carrera Puig");
    Serial.println("Identificador: 006");

    DateTime now = rtc.now();
    Serial.print("Hora actual: ");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(" ");
    Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(" (");
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();

    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(5000);
    digitalWrite(ledverde, LOW);
    }



// CONTRASEÑA 7

  else{
    if(i[0] == '0' && i[1] == '1' && i[2] == '0' && i[3] == '7' ){

    Serial.println("CONTRASEÑA CORRECTA!!");
    i[0] = 0;
    i[1] = 0;
    i[2] = 0;
    i[3] = 0;
    Serial.println("Bienvenido Adrià Giménez Marin");
    Serial.println("Identificador: 007");

    DateTime now = rtc.now();
    Serial.print("Hora actual: ");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(" ");
    Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(" (");
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();

    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(5000);
    digitalWrite(ledverde, LOW);
    }
  
// CONTRASEÑA 8

  else{
    if(i[0] == '1' && i[1] == '0' && i[2] == '3' && i[3] == '4' ){

    Serial.println("CONTRASEÑA CORRECTA!!");
    i[0] = 0;
    i[1] = 0;
    i[2] = 0;
    i[3] = 0;
    Serial.println("Bienvenido Adrià Aragall Laderas");
    Serial.println("Identificador: 008");

    DateTime now = rtc.now();
    Serial.print("Hora actual: ");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(" ");
    Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(" (");
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();

    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(5000);
    digitalWrite(ledverde, LOW);
    }

//CONTRASEÑA 9

  else{
    if(i[0] == '2' && i[1] == '0' && i[2] == '0' && i[3] == '9' ){

    Serial.println("CONTRASEÑA CORRECTA!!");
    i[0] = 0;
    i[1] = 0;
    i[2] = 0;
    i[3] = 0;
    Serial.println("Bienvenida Julia Gómez Pijoan");
    Serial.println("Identificador: 009");

    DateTime now = rtc.now();
    Serial.print("Hora actual: ");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(" ");
    Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(" (");
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();

    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(5000);
    digitalWrite(ledverde, LOW);
    }

// CONTRASEÑA 10

  else{
    if(i[0] == '2' && i[1] == '0' && i[2] == '3' && i[3] == '0' ){

    Serial.println("CONTRASEÑA CORRECTA!!");
    i[0] = 0;
    i[1] = 0;
    i[2] = 0;
    i[3] = 0;
    Serial.println("Bienvenida Carla Borrell Martínez");
    Serial.println("Identificador: 010");

    DateTime now = rtc.now();
    Serial.print("Hora actual: ");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(" ");
    Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(" (");
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();

    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(5000);
    digitalWrite(ledverde, LOW);
    }

//CONTRASEÑA 11

  else{
    if(i[0] == '5' && i[1] == '7' && i[2] == '1' && i[3] == '5' ){

    Serial.println("CONTRASEÑA CORRECTA!!");
    i[0] = 0;
    i[1] = 0;
    i[2] = 0;
    i[3] = 0;
    Serial.println("Bienvenida Jana Del Río Santamaría");
    Serial.println("Identificador: 011");

    DateTime now = rtc.now();
    Serial.print("Hora actual: ");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(" ");
    Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(" (");
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();

    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(5000);
    digitalWrite(ledverde, LOW);
    }

//CONTRASEÑA 12

  else{
    if(i[0] == '1' && i[1] == '1' && i[2] == '2' && i[3] == '7' ){

    Serial.println("CONTRASEÑA CORRECTA!!");
    i[0] = 0;
    i[1] = 0;
    i[2] = 0;
    i[3] = 0;
    Serial.println("Bienvenida Berta Borrell Martinez");
    Serial.println("Identificador: 012");

    DateTime now = rtc.now();
    Serial.print("Hora actual: ");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(" ");
    Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(" (");
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();

    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(5000);
    digitalWrite(ledverde, LOW);
    }



//CONTRASEÑA 13



  else{
    if(i[0] == '3' && i[1] == '3' && i[2] == '3' && i[3] == '4' ){

    Serial.println("CONTRASEÑA CORRECTA!!");
    i[0] = 0;
    i[1] = 0;
    i[2] = 0;
    i[3] = 0;
    Serial.println("Bienvenida Claudia Huber García");
    Serial.println("Identificador: 013");

    DateTime now = rtc.now();
    Serial.print("Hora actual: ");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(" ");
    Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(" (");
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();
    
    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(5000);
    digitalWrite(ledverde, LOW);
    }
    
    

// CONTRASEÑA 14

  else{
    if(i[0] == '9' && i[1] == '9' && i[2] == '6' && i[3] == '4' ){

    Serial.println("CONTRASEÑA CORRECTA!!");
    i[0] = 0;
    i[1] = 0;
    i[2] = 0;
    i[3] = 0;
    Serial.println("Bienvenido Santiago Ávila Navarro");
    Serial.println("Identificador: 014");

    DateTime now = rtc.now();
    Serial.print("Hora actual: ");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(" ");
    Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(" (");
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();

    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(5000);
    digitalWrite(ledverde, LOW);
    }

// CONTRASEÑA 15

  else{
    if(i[0] == '9' && i[1] == '9' && i[2] == '9' && i[3] == '9' ){

    Serial.println("CONTRASEÑA CORRECTA!!");
    i[0] = 0;
    i[1] = 0;
    i[2] = 0;
    i[3] = 0;
    Serial.println("Bienvenido Marcos Vives Albiol");
    Serial.println("Identificador: 015");

    DateTime now = rtc.now();
    Serial.print("Hora actual: ");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(" ");
    Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(" (");
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();

    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(5000);
    digitalWrite(ledverde, LOW);
    }

// CONTRASEÑA 16

  else{
    if(i[0] == '6' && i[1] == '5' && i[2] == '4' && i[3] == '3' ){

    Serial.println("CONTRASEÑA CORRECTA!!");
    i[0] = 0;
    i[1] = 0;
    i[2] = 0;
    i[3] = 0;
    Serial.println("Bienvenida Claudia Huber García");
    Serial.println("Identificador: 016");

    DateTime now = rtc.now();
    Serial.print("Hora actual: ");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(" ");
    Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(" (");
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();

    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(5000);
    digitalWrite(ledverde, LOW);
    }

// CONTRASEÑA 17

  else{
    if(i[0] == '2' && i[1] == '7' && i[2] == '0' && i[3] == '7' ){

    Serial.println("CONTRASEÑA CORRECTA!!");
    i[0] = 0;
    i[1] = 0;
    i[2] = 0;
    i[3] = 0;
    Serial.println("Bienvenido Santi Ávila Plaza");
    Serial.println("Identificador: 017");
    
    DateTime now = rtc.now();
    Serial.print("Hora actual: ");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(" ");
    Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(" (");
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();

    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(200);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    digitalWrite(ledverde, LOW);
    delay(200);
    digitalWrite(ledverde, HIGH);
    delay(5000);
    digitalWrite(ledverde, LOW);
    }

// CONTRASEÑA INCORRECTA

  else{
    Serial.println("CONTRASEÑA INCORRECTA:(");
    i[0] = 0;
    i[1] = 0;
    i[2] = 0;
    i[3] = 0;

    DateTime now = rtc.now();
    Serial.print("Hora actual: ");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(" ");
    Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(" (");
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();

    
    
    digitalWrite(ledrojo, HIGH);
    tone(piezo, 700);
    delay(400);
    digitalWrite(ledrojo, LOW);
    noTone(piezo);
    delay(400);
    digitalWrite(ledrojo, HIGH);
    tone(piezo, 700);
    delay(400);
    digitalWrite(ledrojo, HIGH);
    tone(piezo, 700);
    digitalWrite(ledrojo, LOW);
    noTone(piezo);
    delay(400);
    digitalWrite(ledrojo, HIGH);
    tone(piezo, 700);
    delay(5000);
    digitalWrite(ledrojo, LOW);
    noTone(piezo);
    
    }
  }
  }
  }
  }
  }
  }
  }
  }
  }
  }
  }
  }
  }
  }
  }
  }
  

cont = 0; // Reinciamos el valor "cont" a 0
j = 0; // Reinciamos el valor "j" a 0
key = 0; // Reinciamos el valor "key" a 0
}