Arduino RFID Locker

1#include <Servo.h>
2 Servo midway;
3#include <SPI.h>
4#include <MFRC522.h>
5  
6
7#define SS_PIN 10
8#define RST_PIN 9
9MFRC522 mfrc522(SS_PIN, RST_PIN);   // Create MFRC522 instance.
10int LED = 6; 
11
12 
13void setup()
14{
15    midway. attach(7);
16  Serial.begin(9600);   // Initiate a serial communication
17  SPI.begin();      // Initiate  SPI bus
18  mfrc522.PCD_Init();   // Initiate  MFRC522
19  Serial.println("Approximate your card to the reader...");
20  Serial.println();
21  
22    pinMode(6, OUTPUT);
23
24}
25void loop() 
26{
27
28 
29  // Look  for new cards
30  if ( ! mfrc522.PICC_IsNewCardPresent()) 
31  {
32    return;
33  }
34  // Select one of the cards
35  if ( ! mfrc522.PICC_ReadCardSerial()) 
36  {
37    return;
38  }
39  //Show UID on serial monitor
40  Serial.print("UID  tag :");
41  String content= "";
42  byte letter;
43  for (byte i = 0; i <  mfrc522.uid.size; i++) 
44  {
45     Serial.print(mfrc522.uid.uidByte[i] < 0x10  ? " 0" : " ");
46     Serial.print(mfrc522.uid.uidByte[i], HEX);
47     content.concat(String(mfrc522.uid.uidByte[i]  < 0x10 ? " 0" : " "));
48     content.concat(String(mfrc522.uid.uidByte[i],  HEX));
49  }
50  Serial.println();
51  Serial.print("Message : ");
52  content.toUpperCase();
53  if (content.substring(1) == "79 5E AB 48 , 09 77 60 29=") //change here the  UID of the card/cards that you want to give access
54  {
55    Serial.println("Authorized  access");
56    Serial.println();
57    delay(3000);
58  }
59 
60 else   {
61    Serial.println(" Access denied");
62   
63    digitalWrite(6, HIGH);   //  turn the LED 
64     delay(1500);
65       midway.write(0);
66  delay (300);
67     digitalWrite(6, LOW);    // turn the LED  LOW
68               delay(1500);  
69 midway.write(90);
70  delay (200);
71  }
72} 
73