RC522

index.md

/*
 * --------------------------------------------------------------------------------------------------------------------
 * Example sketch/program showing how to read data from a PICC to serial.
 * --------------------------------------------------------------------------------------------------------------------
 * This is a MFRC522 library example; for further details and other examples see: https://github.com/miguelbalboa/rfid
 * 
 * Example sketch/program showing how to read data from a PICC (that is: a RFID Tag or Card) using a MFRC522 based RFID
 * Reader on the Arduino SPI interface.
 * 
 * When the Arduino and the MFRC522 module are connected (see the pin layout below), load this sketch into Arduino IDE
 * then verify/compile and upload it. To see the output: use Tools, Serial Monitor of the IDE (hit Ctrl+Shft+M). When
 * you present a PICC (that is: a RFID Tag or Card) at reading distance of the MFRC522 Reader/PCD, the serial output
 * will show the ID/UID, type and any data blocks it can read. Note: you may see "Timeout in communication" messages
 * when removing the PICC from reading distance too early.
 * 
 * If your reader supports it, this sketch/program will read all the PICCs presented (that is: multiple tag reading).
 * So if you stack two or more PICCs on top of each other and present them to the reader, it will first output all
 * details of the first and then the next PICC. Note that this may take some time as all data blocks are dumped, so
 * keep the PICCs at reading distance until complete.
 * 
 * @license Released into the public domain.
 * 
 * Typical pin layout used:
 * -----------------------------------------------------------------------------------------
 *             MFRC522      Arduino       Arduino   Arduino    Arduino          Arduino
 *             Reader/PCD   Uno           Mega      Nano v3    Leonardo/Micro   Pro Micro
 * Signal      Pin          Pin           Pin       Pin        Pin              Pin
 * -----------------------------------------------------------------------------------------
 * RST/Reset   RST          9             5         D9         RESET/ICSP-5     RST
 * SPI SS      SDA(SS)      10            53        D10        10               10
 * SPI MOSI    MOSI         11 / ICSP-4   51        D11        ICSP-4           16
 * SPI MISO    MISO         12 / ICSP-1   50        D12        ICSP-1           14
 * SPI SCK     SCK          13 / ICSP-3   52        D13        ICSP-3           15
 */

#include <SPI.h>
#include <MFRC522.h>
#include <Servo.h>

#define RST_PIN         9          // Configurable, see typical pin layout above
#define SS_PIN          10         // Configurable, see typical pin layout above
#define OK_PIN 4
#define READ_PIN 3
#define BAD_PIN 2
#define SERVO_PIN 5
#define LOCK_PIN 8

MFRC522 mfrc522(SS_PIN, RST_PIN);  // Create MFRC522 instance
byte readCard[4];
Servo myservo;

void setup() {
  Serial.begin(9600);   // Initialize serial communications with the PC
  while (!Serial);    // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4)
  SPI.begin();      // Init SPI bus
  mfrc522.PCD_Init();   // Init MFRC522
  mfrc522.PCD_DumpVersionToSerial();  // Show details of PCD - MFRC522 Card Reader details
  Serial.println(F("Scan PICC to see UID, SAK, type, and data blocks..."));
  pinMode(BAD_PIN, OUTPUT);
  pinMode(OK_PIN, OUTPUT);
  pinMode(READ_PIN, OUTPUT);
  pinMode(LOCK_PIN, INPUT);
  myservo.attach(SERVO_PIN);
  if (mfrc522.PCD_PerformSelfTest())
  digitalWrite(READ_PIN, HIGH);
  else {
  digitalWrite(BAD_PIN, HIGH); return; }
  myservo.write(10); 
}

void loop() {
  // Look for new cards
  if ( ! mfrc522.PICC_IsNewCardPresent()) {
    return;
  }

  // Select one of the cards
  if ( ! mfrc522.PICC_ReadCardSerial()) {
    return;
  }

  for (int i = 0; i < 4; i++) {  //
    readCard[i] = mfrc522.uid.uidByte[i];
    Serial.println(readCard[i], HEX);
  }
  mfrc522.PICC_HaltA();

  digitalWrite(OK_PIN, LOW);
  digitalWrite(READ_PIN, LOW);
  digitalWrite(BAD_PIN, LOW);
  
  if ((readCard[0] == 0x01) && (readCard[1] == 0x75) && (readCard[2] == 0x1F) && (readCard[3] == 0xB5)) {
    digitalWrite(OK_PIN, HIGH);
    myservo.write(90); 
  } else {
    digitalWrite(BAD_PIN, HIGH);
  }
  while(digitalRead(LOCK_PIN) != HIGH) {
    delay(100);
  }
  digitalWrite(OK_PIN, LOW);
  digitalWrite(BAD_PIN, LOW);
  digitalWrite(READ_PIN, HIGH);
  myservo.write(10); 
}