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

#define SDA_PIN 53
#define RST_PIN 5

MFRC522 mfrc522(SDA_PIN, RST_PIN);

void setup() {
  Serial.begin(9600);
  SPI.begin();
  mfrc522.PCD_Init();
}

void loop() {
  if (!mfrc522.PICC_IsNewCardPresent()) {
    return;
  }

  if (!mfrc522.PICC_ReadCardSerial()) {
    return;
  }

  Serial.println("Karte entdeckt!");

  byte block = 4;
  byte data[] = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10};

  MFRC522::StatusCode status = mfrc522.MIFARE_Write(block, data, 16);
  if (status != MFRC522::STATUS_OK) {
    Serial.print("Schreibfehler: ");
    Serial.println(mfrc522.GetStatusCodeName(status));
  } else {
    Serial.println("Daten erfolgreich geschrieben.");
  }

  delay(1000);
}