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RFID CARD READER WITH ARDUINO, RFID-RC522 and LCD 16x2





Radio-frequency identification (RFID) uses electromagnetic fields to automatically identify and track tags attached to objects. The tags contain electronically stored information. Passive tags collect energy from a nearby RFID reader's interrogating radio waves. Active tags have a local power source such as a battery and may operate at hundreds of meters from the RFID reader. Unlike a barcode, the tag need not be within the line of sight of the reader, so it may be embedded in the tracked object. RFID is one method for Automatic Identification and Data Capture (AIDC).
RFID tags are used in many industries, for example, an RFID tag attached to an automobile during production can be used to track its progress through the assembly line; RFID-tagged pharmaceuticals can be tracked through warehouses; and implanting RFID microchips in livestock and pets allows positive identification of animals.
Since RFID tags can be attached to cash, clothing, and possessions, or implanted in animals and people, the possibility of reading personally-linked information without consent has raised serious privacy concerns. These concerns resulted in standard specifications development addressing privacy and security issues. ISO/IEC 18000 and ISO/IEC 29167 use on-chip cryptography methods for un-traceability, tag and reader authentication, and over-the-air privacy. ISO/IEC 20248 specifies a digital signature data structure for RFID and barcodes providing data, source and read method authenticity. This work is done within ISO/IEC JTC 1/SC 31 Automatic identification and data capture techniques.
COMPONENTS:
  • RFID RC-522
  • ARDUINO UNO
  • LED
  • BUZZER
  • JUMPPER WIRES
  • BATTERY (9V WITH CAP)
  • PLUG (5 x 2.1)
  • LCD (16 x 2)
  • ADDITIONAL CONNECTION PINS
  • RISISTANCE (220 ohm) (x 2)
  • VARIABLE RESISTOR (10 K)
CIRCUIT DIAGRAM:


ARDUINO CODE:
  • /*------------------------------------------
  •   RFID CARD READER 
  •   By https://nonstopengineering.blogspot.com/
  •   Using Arduino,RFID-RC522 and LCD 16x2
  •   ------------------------------------------*/

  • #include <EEPROM.h>  //Library To read and write PICC's UIDs from/to EEPROM
  • #include <SPI.h>      //Library  RC522 Module uses SPI protocol
  • #include <MFRC522.h> //Library  RC522 Module
  • #include <LiquidCrystal.h> //Library  for LCD Display

  • boolean match = false; // initialize card match to false
  • boolean programMode = false; // initialize programming mode to false
  • int successRead; // Variable integer to keep if we have Successful Read from Reader
  • byte storedCard[4];   // Stores an ID read from EEPROM
  • byte readCard[4];           // Stores scanned ID read from RFID Module
  • byte masterCard[4]; // Stores master card's ID read from EEPROM
  • #define SS_PIN 10
  • #define RST_PIN 9
  • MFRC522 mfrc522(SS_PIN, RST_PIN);  // Create MFRC522 instance.
  • LiquidCrystal lcd(7, 6, 5, 4, 3, 2); //Initializing LCD PINS as (RS,EN,D4,D5,D6,D7)
  • void setup() {
  •   // put your setup code here, to run once:
  •   Serial.begin(9600);  // Initialize serial communications with PC
  •   lcd.begin(16, 2);    //Initializing LCD 16x2
  •   pinMode(8, OUTPUT);  //LED and Buzzer PIN OUT
  •   SPI.begin();           // MFRC522 Hardware uses SPI protocol
  •   mfrc522.PCD_Init();    // Initialize MFRC522 Hardware
  •   mfrc522.PCD_SetAntennaGain(mfrc522.RxGain_max);
  •   if (EEPROM.read(1) != 1) {  // Look EEPROM if Master Card defined, EEPROM address 1 holds if defined
  •     Serial.println("No Master Card Defined"); //When no Master Card in Your EEROM (Serial Display)
  •     Serial.println("Scan A PICC to Define as Master Card");
  •     lcd.clear();
  •     lcd.setCursor(0, 0);
  •     lcd.println("SET MASTERCARD   "); //When no Master Card in Your EEROM (LCD Display)
  •     lcd.setCursor(0, 1);
  •     lcd.println("SCAN A PICC....."); //Scan any RFID CARD to set Your Master Card in Your EEROM (LCD Display)
  •     delay(1500);
  •     do {
  •       successRead = getID(); // sets successRead to 1 when we get read from reader otherwise 0
  •     }
  •     while (!successRead); //the program will not go further while you not get a successful read
  •     for ( int j = 0; j < 4; j++ ) { // Loop 4 times
  •       EEPROM.write( 2 + j, readCard[j] ); // Write scanned PICC's UID to EEPROM, start from address 3
  •     }
  •     EEPROM.write(1, 1); //Write to EEPROM we defined Master Card.
  •     Serial.println("Master Card Defined");
  •     
  •   }
  •   Serial.println("Master Card's UID");
  •   for ( int i = 0; i < 4; i++ ) {     // Read Master Card's UID from EEPROM
  •     masterCard[i] = EEPROM.read(2 + i); // Write it to masterCard
  •     Serial.print(masterCard[i], HEX); //Master Card only view in serial
  •      Serial.println("Waiting PICCs to bo scanned :)"); 
  •   }
  •   //WAITING TO SCAN THE RFID CARDS:
  •   Serial.println("");
  •   Serial.println("Waiting PICCs to bo scanned :)");
  •   lcd.clear();
  •   lcd.setCursor(0, 0);
  •   lcd.println("WAITING         ");
  •   lcd.setCursor(0, 1);
  •   lcd.println("FOR PICC....     ");
  •   delay(1500);
  • }
  • void loop() {
  •   lcd.clear();
  •   lcd.setCursor(0, 0);
  •   lcd.print("      SWIPE");
  •   lcd.setCursor(0, 1);
  •   lcd.print("    YOUR CARD");

  •  /* 
  •  if (digitalRead(BUTTON) == HIGH);                     //To Delete the EEROM USE the below command just run it
  •   {
  •   // for (int i = 0 ; i < EEPROM.length() ; i++) {
  •   // EEPROM.write(i, 0);
  •   // }
  •   // }                                     */
  •   do {
  •     successRead = getID(); // sets successRead to 1 when we get read from reader otherwise 0
  •     if (programMode) {
  •       // Program Mode cycles through RGB waiting to read a new card
  •     }
  •     else {
  •    }}
  •   while (!successRead); //the program will not go further while you not get a successful read
  •   if (programMode) {
  •     if ( isMaster(readCard) ) {  //If master card scanned again exit program mode
  •       Serial.println("This is Master Card");
  •       Serial.println("Exiting Program Mode");
  •       lcd.clear();
  •       lcd.setCursor(0, 0);
  •       lcd.print("EXITING FROM");
  •       lcd.setCursor(0, 1);
  •       lcd.print("MASTERCARD MODE");
  •       delay(2000);
  •       programMode = false;
  •       return;
  •     }
  •     else {
  •       if ( findID(readCard) ) { //If scanned card is known delete it
  •         Serial.println("I know this PICC, so removing");
  •         lcd.clear();
  •         lcd.setCursor(0, 0);
  •         lcd.print("AVAILABLE!");
  •         lcd.setCursor(0, 1);
  •         lcd.print("SO DELETING.....");
  •         delay(5000);
  •         deleteID(readCard);
  •         Serial.println("-----------------------------");
  •       }
  •       else {                    // If scanned card is not known add it
  •         Serial.println("I do not know this PICC, adding...");
  •         lcd.clear();
  •         lcd.setCursor(0, 0);
  •         lcd.print("Card no:");
  •         lcd.setCursor(0, 1);
  •         lcd.print(readCard[0], HEX);
  •         lcd.print(readCard[1], HEX);
  •         lcd.print(readCard[2], HEX);
  •         lcd.print(readCard[3], HEX);
  •         lcd.print(readCard[4], HEX);
  •         delay(4000);
  •         lcd.clear();
  •         lcd.setCursor(0, 0);
  •         lcd.print("NOT AVAILABLE");
  •         lcd.setCursor(0, 1);
  •         lcd.print("SO ADDING.......");
  •         delay(5000);
  •         writeID(readCard);
  •         Serial.println("-----------------------------");
  •       }} }
  •   else {
  •     if ( isMaster(readCard) ) {  // If scanned card's ID matches Master Card's ID enter program mode
  •       programMode = true;
  •       Serial.println("Welcome to Mastercard Mode");
  •       lcd.clear();
  •       lcd.setCursor(0, 0);
  •       lcd.print("WELCOME TO");
  •       lcd.setCursor(0, 1);
  •       lcd.print("MASTERCARD MODE");
  •       delay(3000);
  •       int count = EEPROM.read(0); // Read the first Byte of EEPROM that
  •       Serial.print("I have ");    // stores the number of ID's in EEPROM
  •       Serial.print(count);
  •       Serial.print(" record(s) on EEPROM");
  •       Serial.println("");
  •       Serial.println("Scan a PICC to ADD or REMOVE");
  •       Serial.println("-----------------------------");
  •       lcd.clear();
  •       lcd.setCursor(0, 0);
  •       lcd.print("SCAN PICC TO");
  •       lcd.setCursor(0, 1);
  •       lcd.print("ADD OR REMOVE...");
  •       delay(2500);
  •     }
  •     else {
  •       if ( findID(readCard) ) {        // If not, see if the card is in the EEPROM
  •         Serial.println("Acces Granted");
  •         lcd.clear();
  •         lcd.setCursor(0, 0);
  •         lcd.print(" CONGRATULATION");
  •         lcd.setCursor(0, 1);
  •         lcd.print(" ACCESS GRANTED");
  •         digitalWrite(8, HIGH);
  •         delay(1500);
  •         digitalWrite(8, LOW);
  •         lcd.clear();
  •       }
  •       else {        // If not, show that the ID was not valid
  •         Serial.println("Access Denied");
  •         for (int abcd = 0; abcd < 6; abcd++)
  •         {
  •           lcd.clear();
  •           lcd.setCursor(0, 0);
  •           lcd.print("     SORRY");
  •           lcd.setCursor(0, 1);
  •           lcd.print("  ACCESS DENIED");
  •           digitalWrite(8, HIGH);
  •           delay(700);
  •           digitalWrite(8, LOW);
  •           lcd.clear();
  •           lcd.print("   YOU'RE NOT  ");
  •           lcd.setCursor(0, 1);
  •           lcd.print("   AUTHORIZED   ");
  •           delay(700);
  •         }
  •         lcd.clear();
  •       }}}}
  • int getID() {
  •   // Getting ready for Reading PICCs
  •   if ( ! mfrc522.PICC_IsNewCardPresent()) { //If a new PICC placed to RFID reader continue
  •     return 0;
  •   }
  •   if ( ! mfrc522.PICC_ReadCardSerial()) { //Since a PICC placed get Serial and continue
  •     return 0;
  •   }
  •   // There are Mifare PICCs which have 4 byte or 7 byte UID care if you use 7 byte PICC
  •   // I think we should assume every PICC as they have 4 byte UID
  •   // Until we support 7 byte PICCs

  •   Serial.println("Scanning PICC's UID.........");
  •   lcd.clear();
  •   lcd.setCursor(0, 0);
  •   lcd.print("SCANNING");
  •   lcd.setCursor(0, 1);
  •   lcd.print("PICC's UID.....");
  •   delay(2000);
  •   for (int i = 0; i < 4; i++) {  //
  •     readCard[i] = mfrc522.uid.uidByte[i];
  •     Serial.print(readCard[i], HEX);
  •   }
  •   Serial.println("");
  •   mfrc522.PICC_HaltA(); // Stop reading
  •   return 1;
  • }
  • boolean isMaster( byte test[] ) {
  •   if ( checkTwo( test, masterCard ) )
  •     return true;
  •   else
  •     return false;
  • }

  • boolean checkTwo ( byte a[], byte b[] ) {
  •   if ( a[0] != NULL ) // Make sure there is something in the array first
  •     match = true; // Assume they match at first
  •   for ( int k = 0; k < 4; k++ ) { // Loop 4 times
  •     if ( a[k] != b[k] ) // IF a != b then set match = false, one fails, all fail
  •       match = false;
  •   }
  •   if ( match ) { // Check to see if if match is still true
  •     return true; // Return true
  •   }
  •   else  {
  •     return false; // Return false
  •   }}
  • boolean findID( byte find[] ) {
  •   int count = EEPROM.read(0); // Read the first Byte of EEPROM that
  •   for ( int i = 1; i <= count; i++ ) {  // Loop once for each EEPROM entry
  •     readID(i); // Read an ID from EEPROM, it is stored in storedCard[4]
  •     if ( checkTwo( find, storedCard ) ) { // Check to see if the storedCard read from EEPROM
  •       return true;
  •       break; // Stop looking we found it
  •     }
  •     else {  // If not, return false
  •     }}
  •   return false;
  • }
  • void readID( int number ) {
  •   int start = (number * 4 ) + 2; // Figure out starting position
  •   for ( int i = 0; i < 4; i++ ) { // Loop 4 times to get the 4 Bytes
  •     storedCard[i] = EEPROM.read(start + i); // Assign values read from EEPROM to array
  •   }
  • }
  • void deleteID( byte a[] ) {
  •   if ( !findID( a ) ) { // Before we delete from the EEPROM, check to see if we have this card!
  •     failedWrite(); // If not
  •   }
  •   else {
  •     int num = EEPROM.read(0); // Get the numer of used spaces, position 0 stores the number of ID cards
  •     int slot; // Figure out the slot number of the card
  •     int start;// = ( num * 4 ) + 6; // Figure out where the next slot starts
  •     int looping; // The number of times the loop repeats
  •     int j;
  •     int count = EEPROM.read(0); // Read the first Byte of EEPROM that stores number of cards
  •     slot = findIDSLOT( a ); //Figure out the slot number of the card to delete
  •     start = (slot * 4) + 2;
  •     looping = ((num - slot) * 4);
  •     num--; // Decrement the counter by one
  •     EEPROM.write( 0, num ); // Write the new count to the counter
  •     for ( j = 0; j < looping; j++ ) { // Loop the card shift times
  •       EEPROM.write( start + j, EEPROM.read(start + 4 + j)); // Shift the array values to 4 places earlier in the EEPROM
  •     }
  •     for ( int k = 0; k < 4; k++ ) { //Shifting loop
  •       EEPROM.write( start + j + k, 0);
  •     }
  •     successDelete();
  •   }}
  •   //For Failed to add the card:
  • void failedWrite() {

  •   Serial.println("something wrong with Card");
  •   lcd.clear();
  •   lcd.setCursor(0, 0);
  •   lcd.print("SOMETHING WRONG");
  •   lcd.setCursor(0, 1);
  •   lcd.print("WITH CARD");
  •   delay(2000);
  • }
  • //For Sucessfully Deleted:
  • void successDelete() {
  •   Serial.println("Succesfully removed");
  •   lcd.clear();
  •   lcd.setCursor(0, 0);
  •   lcd.print("SUCCESFULLY");
  •   lcd.setCursor(0, 1);
  •   lcd.print("REMOVED");
  •   delay(2000);
  • }
  • int findIDSLOT( byte find[] ) {
  •   int count = EEPROM.read(0); // Read the first Byte of EEPROM that
  •   for ( int i = 1; i <= count; i++ ) { // Loop once for each EEPROM entry
  •     readID(i); // Read an ID from EEPROM, it is stored in storedCard[4]
  •     if ( checkTwo( find, storedCard ) ) { // Check to see if the storedCard read from EEPROM
  •       // is the same as the find[] ID card passed
  •       return i; // The slot number of the card
  •       break; // Stop looking we found it
  •     }
  •   }
  • }
  • //For Sucessfully Added:
  • void successWrite() {

  •   Serial.println("Succesfully added");
  •   lcd.clear();
  •   lcd.setCursor(0, 0);
  •   lcd.print("SUCCESFULLY");
  •   lcd.setCursor(0, 1);
  •   lcd.print("ADDED");
  •   delay(2000);
  • }
  • //For Adding card to EEROM:
  • void writeID( byte a[] ) {
  •   if ( !findID( a ) ) { // Before we write to the EEPROM, check to see if we have seen this card before!
  •     int num = EEPROM.read(0); // Get the numer of used spaces, position 0 stores the number of ID cards
  •     int start = ( num * 4 ) + 6; // Figure out where the next slot starts
  •     num++; // Increment the counter by one
  •     EEPROM.write( 0, num ); // Write the new count to the counter
  •     for ( int j = 0; j < 4; j++ ) { // Loop 4 times
  •       EEPROM.write( start + j, a[j] ); // Write the array values to EEPROM in the right position
  •     }
  •     successWrite();
  •   }
  •   else {
  •     failedWrite();
  •   }
  • }


 ARDUINO CODE FILE → CLICK HERE

 WORKING:





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