#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Keypad.h>
#define pinRelay 2
#define Password_Lenght 8
char Data[Password_Lenght];
char Master[Password_Lenght] = "123A456";
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] = {11, 10, 9, 8};
byte colPins [COLS] = {7, 6, 5, 4};
Keypad customKeypad = Keypad (makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS);

LiquidCrystal_I2C lcd(0x27, 16,2);
void setup() {
  lcd.begin(16,2);
  lcd.backlight();
  pinMode(pinRelay, OUTPUT);
  // put your setup code here, to run once:

}

void loop() {
  char customKey = customKeypad.getKey();
  if (customKey) {
    lcd.print (customKey);
    switch(customKey) {
      case'*':
      digitalWrite(pinRelay, HIGH);
      break;
      case '#':
      digitalWrite(pinRelay, LOW);
      break;
    }
  }
  // put your main code here, to run repeatedly:

}