diff --git a/examples/ReadAndWrite/ReadAndWrite.ino b/examples/ReadAndWrite/ReadAndWrite.ino
index 10ee876..09f1a4b 100644
--- a/examples/ReadAndWrite/ReadAndWrite.ino
+++ b/examples/ReadAndWrite/ReadAndWrite.ino
@@ -2,17 +2,17 @@
  * ----------------------------------------------------------------------------
  * This is a MFRC522 library example; see https://github.com/miguelbalboa/rfid
  * for further details and other examples.
- * 
+ *
  * NOTE: The library file MFRC522.h has a lot of useful info. Please read it.
- * 
+ *
  * Released into the public domain.
  * ----------------------------------------------------------------------------
  * This sample shows how to read and write data blocks on a MIFARE Classic PICC
  * (= card/tag).
- * 
+ *
  * BEWARE: Data will be written to the PICC, in sector #1 (blocks #4 to #7).
- * 
- * 
+ *
+ *
  * Typical pin layout used:
  * -----------------------------------------------------------------------------------------
  *             MFRC522      Arduino       Arduino   Arduino    Arduino          Arduino
@@ -24,7 +24,7 @@
  * 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>
@@ -56,7 +56,7 @@ void setup() {
     Serial.print(F("Using key (for A and B):"));
     dump_byte_array(key.keyByte, MFRC522::MF_KEY_SIZE);
     Serial.println();
-    
+
     Serial.println(F("BEWARE: Data will be written to the PICC, in sector #1"));
 }
 
@@ -95,8 +95,8 @@ void loop() {
     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
+        0x09, 0x0a, 0xff, 0x0b, //  9, 10, 255, 11,
+        0x0c, 0x0d, 0x0e, 0x0f  // 12, 13, 14, 15
     };
     byte trailerBlock   = 7;
     MFRC522::StatusCode status;
@@ -159,7 +159,7 @@ void loop() {
     }
     Serial.print(F("Data in block ")); Serial.print(blockAddr); Serial.println(F(":"));
     dump_byte_array(buffer, 16); Serial.println();
-        
+
     // Check that data in block is what we have written
     // by counting the number of bytes that are equal
     Serial.println(F("Checking result..."));
@@ -177,7 +177,7 @@ void loop() {
         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);