diff --git a/examples/FixBrickedUID/FixBrickedUID.ino b/examples/FixBrickedUID/FixBrickedUID.ino
index d367c22..c7aef0f 100644
--- a/examples/FixBrickedUID/FixBrickedUID.ino
+++ b/examples/FixBrickedUID/FixBrickedUID.ino
@@ -23,15 +23,17 @@
  http://mac86project.altervista.org/
  
  ----------------------------------------------------------------------------- Nicola Coppola
- * Pin layout should be as follows:
- * Signal     Pin              Pin               Pin
- *            Arduino Uno      Arduino Mega      MFRC522 board
- * ------------------------------------------------------------
- * Reset      9                5                 RST
- * SPI SS     10               53                SDA
- * SPI MOSI   11               51                MOSI
- * SPI MISO   12               50                MISO
- * SPI SCK    13               52                SCK
+ * Typical pin layout used:
+ * -----------------------------------------------------------------------------------------
+ *             MFRC522      Arduino       Arduino   Arduino    Arduino          Arduino
+ *             Reader/PCD   Uno           Mega      Nano v3    Leonardo/Micro   Pro Micro
+ * Signal      Pin          Pin           Pin       Pin        Pin              Pin
+ * -----------------------------------------------------------------------------------------
+ * RST/Reset   RST          9             5         D9         RESET/ICSP-5     RST
+ * SPI SS      SDA(SS)      10            53        D10        10               10
+ * 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
  *
  * The reader can be found on eBay for around 5 dollars. Search for "mf-rc522" on ebay.com. 
  */
@@ -47,7 +49,8 @@ MFRC522::MIFARE_Key key;
 
 void setup() {
         Serial.begin(9600);        // Initialize serial communications with the PC
-        SPI.begin();                // Init SPI bus
+        while (!Serial);           // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4)
+        SPI.begin();               // Init SPI bus
         mfrc522.PCD_Init();        // Init MFRC522 card
         Serial.println("Warning: this example clears your mifare UID, use with care!");