Κλειδαριά με relay

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

#define Password_Length 5 
int led = 10;
int led2 = 13;

int signalPin = 12;
const int buzzer = 11;
char Data[Password_Length]; 
char Master[Password_Length] = "1111"; 
char Master2[Password_Length] = "1010"; 

byte data_count = 0, master_count = 0;
bool Pass_is_good;
char customKey;

const byte ROWS = 4;
const byte COLS = 4;

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

byte rowPins[ROWS] = {9, 8, 7, 6};
byte colPins[COLS] = {5, 4, 3, 2};

Keypad customKeypad = Keypad(makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS);

LiquidCrystal_I2C lcd(0x3F, 16, 2);  

void setup(){
  lcd.init(); 
  lcd.backlight();
  pinMode(signalPin, OUTPUT);
  pinMode(led, OUTPUT);
    pinMode(led2, OUTPUT);

}

void loop(){

  lcd.setCursor(0,0);
  lcd.print("Enter Password:");

  customKey = customKeypad.getKey();
  if (customKey){
    Data[data_count] = customKey; 
    lcd.setCursor(data_count,1); 
    lcd.print(Data[data_count]); 
    data_count++; 
    }

  if(data_count == Password_Length-1){
    lcd.clear();

    if(!strcmp(Data, Master)){
      lcd.print("door closed");
      digitalWrite(signalPin, HIGH); 
      digitalWrite(led, HIGH);
delay(1000);
            digitalWrite(led, LOW);
     
      }
   
    else  if(!strcmp(Data, Master2)){
      lcd.print("door open");
         
      digitalWrite(signalPin, LOW);
            digitalWrite(led, HIGH);
      delay(1000);
            digitalWrite(led, LOW);

      }
    
    
    
    
    
    else{
      lcd.print("Incorrect");
tone(buzzer, 2500);
            digitalWrite(led2, HIGH);
delay(1000);
            digitalWrite(led2, LOW);

noTone(buzzer);
      }
    
    lcd.clear();
    clearData();  
  }
  
}

void clearData(){
  while(data_count !=0){
    Data[data_count--] = 0; 
  }
  return;
}