RFID mit dem Arduino programmieren

Bitte erst alle Kabel (Juper Wire) aufbauen, dann den Arduino über USB-Kabel anstecken. Ansonsten kann es sein, dass es nicht funktioniert.

Hinweise

• MFRC522 --> Diese Library muss bei Verwendung der Arduino IDE mit Hilfe des Library Managers installiert werden
• SPI Erklärung auf Wikipedia

Video Erklärung

Der Code zum Video

#include <MFRC522.h>

#define SS_PIN 10
#define RST_PIN 13

MFRC522 rfid(SS_PIN, RST_PIN); // Instance of the class

MFRC522::MIFARE_Key key;

// Init array that will store new NUID
byte nuidPICC[4];


void setup() {


  //while (!Serial);
  Serial.begin(9600);


  SPI.begin(); // Init SPI bus
  rfid.PCD_Init(); // Init MFRC522

  //for (byte i = 0; i < 6; i++) {
  //  key.keyByte[i] = 0xFF;
  //}

  //Serial.println(F("This code scan the MIFARE Classsic NUID."));
  //Serial.print(F("Using the following key:"));
  //printHex(key.keyByte, MFRC522::MF_KEY_SIZE);



}

void loop() {
  checkRFID();
}


void checkRFID() {
  //Serial.println("Checking RFID");
  // RFID Reader
  // Reset the loop if no new card present on the sensor/reader. This saves the entire process when idle.
  if ( ! rfid.PICC_IsNewCardPresent())
    return;

  // Verify if the NUID has been readed
  if ( ! rfid.PICC_ReadCardSerial())
    return;

  //Serial.print(F("PICC type: "));
  MFRC522::PICC_Type piccType = rfid.PICC_GetType(rfid.uid.sak);
  //Serial.println(rfid.PICC_GetTypeName(piccType));

  // Check is the PICC of Classic MIFARE type
  if (piccType != MFRC522::PICC_TYPE_MIFARE_MINI &&
      piccType != MFRC522::PICC_TYPE_MIFARE_1K &&
      piccType != MFRC522::PICC_TYPE_MIFARE_4K) {
    Serial.println(F("Your tag is not of type MIFARE Classic."));
    return;
  }


  printDec(rfid.uid.uidByte, rfid.uid.size);

  rfid.PICC_HaltA();

  // Stop encryption on PCD
  rfid.PCD_StopCrypto1();
}

/**
   Helper routine to dump a byte array as hex values to Serial.
*/
void printHex(byte *buffer, byte bufferSize) {
  for (byte i = 0; i < bufferSize; i++) {
    Serial.print(buffer[i] < 0x10 ? " 0" : " ");
    Serial.print(buffer[i], HEX);
  }
}

/**
   Helper routine to dump a byte array as dec values to Serial.
*/
void printDec(byte *buffer, byte bufferSize) {
  Serial.println("Printing RFID Tag");

  for (byte i = 0; i < bufferSize; i++) {
    //Serial.print(buffer[i] < 0x10 ? " 0" : " ");
    Serial.print(buffer[i], DEC);
  }

  Serial.println();
}