#include <SPI.h>
#include <MFRC522.h>
#include <LiquidCrystal.h>
// initialize the library by associating any needed LCD interface pin
// with the arduino pin number it is connected to
const int rs = 12, en = 11, d4 = 6, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
 
#define SS_PIN 53
#define RST_PIN 5
MFRC522 mfrc522(SS_PIN, RST_PIN);   // Create MFRC522 instance.


void setup() 
{
  lcd.begin(16, 2);
  SPI.begin();      // Initiate  SPI bus
  mfrc522.PCD_Init();   // Initiate MFRC522
  pinMode(7, OUTPUT); //Electric strike 

}
void loop() 
{
  lcd.display();
  lcd.setCursor(0, 0); // top left
  // Look for new cards
  String CardID = "";
  if ( ! mfrc522.PICC_IsNewCardPresent()) 
  {
    return;
  }
  // Select one of the cards
  if ( ! mfrc522.PICC_ReadCardSerial()) 
  {
    return;
  }
  //Show UID on LCD
 

  for (byte i = 0; i < mfrc522.uid.size; i++) 
  {
   lcd.print(mfrc522.uid.uidByte[i],HEX);//Comment out this line after reading card ID
   CardID.concat(String(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " "));
   CardID.concat(String(mfrc522.uid.uidByte[i], HEX));
  
  }
  // if (CardID.substring(1) == "XX XX XX XX")//Change  XX XX XX XX to your Card ID
  if (CardID.substring(1) == "a6 1d eb 06")
  {
  lcd.print(" Access ");
  lcd.setCursor(0, 1); //
  lcd.print(" granted ");
  digitalWrite(7,HIGH);
  delay(5000);
  digitalWrite(7,LOW);
  }
  
  //if (CardID.substring(1) != "XX XX XX XX")//Change  XX XX XX XX to your Card ID
  if (CardID.substring(1) != "a6 1d eb 06")
  {
  lcd.print(" Access " );
  lcd.setCursor(0, 1); //
  lcd.print(" denied " );
  }

 //else   {
  //  Serial.println(" Access denied");
 //   delay(3000);
 // }
}