RFID Lock System with MFRC522

1#include <SPI.h>
2#include <MFRC522.h>
3#include <Servo.h>
4
5
6#define  SS_PIN 53
7#define RST_PIN 5
8#define O 8
9
10MFRC522 mfrc522(SS_PIN, RST_PIN);
11MFRC522::MIFARE_Key  key;
12
13Servo Ser;
14
15int blockNum = 2;
16byte blockData [10];
17
18byte  bufferLen = 18;   //Set buffer length for reading, it has to be 2 more than block  size : 16 + 2
19byte readBlockData[18];   //Array to store data from card
20byte  Registry[18];   //Array to store key
21
22String UID, RUID = "f6255c11";   //UID  of the card you are going to use, use MFRC522 Library to find UID of your Card or  simply use your phone
23bool Access;
24
25MFRC522::StatusCode status;
26long  R;
27void setup() {
28  Serial.begin(115200);   //You can connect Serial output  for debugging
29  Ser.attach(7);
30  Ser.write(130);
31  SPI.begin();
32  mfrc522.PCD_Init();   //Initiate tranciever module
33  
34  long R = 1234567899;   //Default key  for which this code would be looking for, change it if you like and then write the  same key on RFID card for first time use
35  for(int i = 9;i >= 0;i--) {
36    int  D = R % 10;
37    R = R / 10;
38    Registry[i] = D;
39  }
40  Serial.print("Default  Key : ");
41  for (int j = 0 ; j < 10 ; j++) {
42    Serial.print(Registry[j]);
43  } 
44  Serial.println();
45  Serial.print("RUID : " + RUID);
46  Serial.println("\
47");
48  Serial.println("Place Key");
49}
50
51void loop() {
52  for (byte i = 0;  i < 6; i++) {
53    key.keyByte[i] = 0xFF;
54  }
55  if(!mfrc522.PICC_IsNewCardPresent())  {   //Detect if new card is present
56    return; 
57  }
58  if (!mfrc522.PICC_ReadCardSerial())  {
59    return;
60  }
61  Serial.println("Card Detected");
62  R = random(1000000000,  9999999999);   //New random key generation
63  
64  Serial.print(F("PICC type:  "));
65  MFRC522::PICC_Type piccType = mfrc522.PICC_GetType(mfrc522.uid.sak);
66  
67  if (piccType != MFRC522::PICC_TYPE_MIFARE_1K) {   //Check whether the card  is of supported type otherwise communication drops
68    Serial.println(F("Your  tag is not of supported type"));
69    return;
70  }
71  String Type = mfrc522.PICC_GetTypeName(piccType);
72  Serial.println(Type);
73
74  Serial.print("UID : ");
75  UID = "";
76
77  for(byte i = 0;i < mfrc522.uid.size;i++) {
78    UID = UID + String(mfrc522.uid.uidByte[i],  HEX);
79  }
80  Serial.println(UID);
81
82  if(UID == RUID) {   //Checks whether  Card UID are Stored UID are equal
83    Serial.println("UID Verification Successful");
84  }
85  else {
86    Serial.println("UID Verification Failed");
87  }
88  
89  Serial.print("Stored Key : ");
90  
91  mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A,  blockNum, &key, &(mfrc522.uid));   //Authenticate the sector and the block for reading  memory
92  mfrc522.MIFARE_Read(blockNum, readBlockData, &bufferLen);   //Store  read value in readBlockData
93
94  for (int j = 0 ; j < 10 ; j++) {
95    Serial.print(readBlockData[j]);
96  } 
97  Serial.println();
98
99  Serial.print("Current Registered Key Match  : ");
100  for (int j = 0 ; j < 10 ; j++) {
101    Serial.print(Registry[j]);
102  }
103  Serial.println();
104 
105  if(Check(readBlockData, Registry)) {   //Calls  function to check whether the arrays containing Card Key and Stored key are equal
106    Serial.println("Key Match Successful");
107    Serial.println("Access Granted");
108    Access = 1;
109  }
110  else {
111    Serial.println("Key Match Failed");
112    Serial.println("Access Denied");
113    Ring(0);
114    Serial.println();
115    mfrc522.PICC_HaltA();   //Communication broken, this makes the module ready  to scan card again
116    mfrc522.PCD_StopCrypto1();
117    return;   //nothing  else will execute, the loop starts over
118  }
119
120  Serial.print("New Key :  ");
121  Serial.println(R);
122  for(int i = 9;i >= 0;i--) {
123    int D = R %  10;
124    R = R / 10;
125    blockData[i] = D;
126    Registry[i] = D;   //Storing  new key in memory
127  }
128  
129  mfrc522.MIFARE_Write(blockNum, blockData, 16);   //write the new random key in block 2 of sector 0
130  Serial.println("New Key  Written Successfully");
131  Serial.println();
132
133  if(Access) {
134    Ring(1);   //buzzer plays welcome tone
135  }
136  Ser.write(130);   //door opens
137    
138  mfrc522.PICC_HaltA();   //communication broken
139  mfrc522.PCD_StopCrypto1();
140}
141
142void  Ring(bool I) {
143  if(I) {
144    tone(O, 330, 200);   //welcome tone
145    delay(200);
146    tone(O, 494, 250);
147    Ser.write(0);
148    delay(5000);
149  }
150  else  {
151    tone(O, 75, 150);   //access denied tone
152    delay(200);
153    tone(O,  75, 150);
154    Ser.write(130);
155  }
156}
157bool Check(byte A[], byte B[]) {
158  for(int i = 0;i < 10;i++) {
159    if(A[i] == B[i]) {
160      continue;
161    }
162    else {
163      return 0;
164    }
165  }
166  return 1;
167}