   if (result)
     Serial.println(F("OK"));
   else
-    Serial.println(F("defect or unknown"));
+    Serial.println(F("DEFECT or UNKNOWN"));
   Serial.println();
 }
 

  Serial.println(F("*****************************"));
  Serial.println(F("MFRC522 Digital self test"));
  Serial.println(F("*****************************"));
  ShowReaderDetails();  // Show details of PCD - MFRC522 Card Reader details
  Serial.println(F("Performing test..."));
  bool result = mfrc522.PCD_PerformSelfTest();
  Serial.println(F("-----------------------------"));

/*
 * ----------------------------------------------------------------------------
 * Example sketch/program to test your firmware.
 * ----------------------------------------------------------------------------
 * This is a MFRC522 library example; see https://github.com/miguelbalboa/rfid
 * for further details and other examples.
