  * 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>

    byte dataBlock[]    = {
        0x01, 0x02, 0x03, 0x04, //  1,  2,   3,  4,
        0x05, 0x06, 0x07, 0x08, //  5,  6,   7,  8,
        0x08, 0x09, 0xff, 0x0b, //  9, 10, 255, 12,
        0x0c, 0x0d, 0x0e, 0x0f  // 13, 14,  15, 16
    };
    byte trailerBlock   = 7;
    MFRC522::StatusCode status;

        Serial.println(F("  perhaps the write didn't work properly..."));
    }
    Serial.println();

    // Dump the sector data
    Serial.println(F("Current data in sector:"));
    mfrc522.PICC_DumpMifareClassicSectorToSerial(&(mfrc522.uid), &key, sector);
