         // Card found! (Known card OR found free spot for new card)
         // Attempt to add credits to card
         if(updateAndVerify(addr,card)){
-          Serial.print("C");
+          //Serial.print("C");
           // OK Beep
         } else{
           // Reset credits on vending machine

#define SS_PIN 10
#define RST_PIN A0

#include <SPI.h>
#include <MFRC522.h> // MFRC522 library by Miguel Balboa (circuitito.com, Jan, 2012) & Søren Thing Andersen (access.thing.dk, fall of 2013)
#include "EEPROMAnything.h"
#include "VendingMachineRFID.h"

/* Hack to fix sizeof(card_uid_t) sometimes becoming 5 (?) */
// #define CARD_UID_SIZE 4
// Caused by Stream.parseInt();

MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance.
uint32_t lastCardScan; // Debounce RFID reads

  uint8_t first_half   = number >> 8;   // >>>> >>>> 0001 0110
  uint8_t sencond_half = number & mask; // ____ ____ 0100 0111
  char waiting_for_ok = 1;
  uint8_t transmitAttemptsRemaining = transmission_attempts;
  while(waiting_for_ok && transmitAttemptsRemaining-- > 0){
    // Flush incoming buffer
    while(Serial.available()){Serial.read();}
