Cardputer RFID

#include "M5Cardputer.h"
#include "MFRC522_I2C.h"

MFRC522 mfrc522(0x28);

void setup() {
  M5.begin();
  M5.Power.begin();
  M5.Lcd.setRotation(1);
  M5.Lcd.setTextSize(2);

  M5.Lcd.println("RFID_13_56MHz");
  M5.Lcd.println("Attach RFID2 unit");
  delay(500);
  Wire.begin();
  mfrc522.PCD_Init();

  M5.Lcd.fillScreen(BLACK);
  M5.Lcd.setCursor(0, 0);
  M5.Lcd.println("RFID2 Unit working");
  M5.Lcd.println("Gain: " + String(mfrc522.PCD_GetAntennaGain()));
  M5.Lcd.println("");
  M5.Lcd.println("Waiting for 13.56MHz");
  M5.Lcd.println("card...");
}

void loop() {
  if ((!mfrc522.PICC_IsNewCardPresent()) || (!mfrc522.PICC_ReadCardSerial() )) {
    delay(500);
    return;
  }

  M5.Lcd.fillScreen(BLACK);
  M5.Lcd.setCursor(0, 0);

  M5.Lcd.println("Card detected! ");
  M5.Lcd.println();

  M5.Lcd.print("Type: ");
  M5.Lcd.println(mfrc522.PICC_GetTypeName(mfrc522.PICC_GetType(mfrc522.uid.sak)));

  M5.Lcd.print("UID: ");
  for (byte i = 0; i < mfrc522.uid.size; i++) {
    if (mfrc522.uid.uidByte[i] < 0x10) M5.Lcd.print("0");
    M5.Lcd.print(mfrc522.uid.uidByte[i], HEX);
    M5.Lcd.print(' ');
  }
  M5.Lcd.println();

  delay(1000);
}