Rfid to keyboard

hi all.
i need mifare uid keyboard using arduini micro.
i use rc522 library , response using serial.print.
the problem m not able send data keyboard emulating it.
this code
<code>
 /*
* mfrc522 - library use arduino rfid module kit 13.56 mhz tags spi w , r cooqrobot.
* library file mfrc522.h has wealth of useful info. please read it.
* functions documented in mfrc522.cpp.
*
* based on code dr.leong   ( www.b2cqshop.com )
* created miguel balboa (circuitito.com), jan, 2012.
* rewritten søren thing andersen (access.thing.dk), fall of 2013 (translation english, refactored, comments, anti collision, cascade levels.)
* released public domain.
*
* sample program showing how read data picc using mfrc522 reader on arduino spi interface.
*----------------------------------------------------------------------------- empty_skull
* aggiunti pin per arduino mega
* add pin configuration arduino mega
* http://mac86project.altervista.org/
----------------------------------------------------------------------------- nicola coppola
* pin layout should follows:
* signal     pin              pin               pin
*            arduino uno      arduino mega      mfrc522 board
* ------------------------------------------------------------
* reset      9                5                 rst
* spi ss     10               53                sda
* spi mosi   11               52                mosi
* spi miso   12               51                miso
* spi sck    13               50                sck
*
* reader can found on ebay around 5 dollars. search "mf-rc522" on ebay.com.
*/

#include <spi.h>
#include <mfrc522.h>

#define ss_pin 10
#define rst_pin 5
mfrc522 mfrc522(ss_pin, rst_pin);   // create mfrc522 instance.

void setup() {
   serial.begin(115200);   // initialize serial communications pc
   spi.begin();         // init spi bus
   mfrc522.pcd_init();   // init mfrc522 card
   keyboard.begin();
}

void loop() {
   // new cards
   if ( ! mfrc522.picc_isnewcardpresent()) {
      return;
   }

   // select 1 of cards
   if ( ! mfrc522.picc_readcardserial()) {

      return;
}
(byte = 0; < mfrc522.uid.size; i++) {
   serial.print(mfrc522.uid.uidbyte < 0x10 ? " 0" : " ");
   keyboard.print((mfrc522.uid.uidbyte < 0x10 ? " 0" : " "));
   serial.print(mfrc522.uid.uidbyte, hex);
   keyboard.print((mfrc522.uid.uidbyte < 0x10 ? " 0" : " "));
   
}
serial.println();
   

}                      
</code>

on pc text spaces. think casting problem, s true? how can solve that?
thanks

try this:

code: [select]


   serial.print(mfrc522.uid.uidbyte < 0x10 ? " 0" : " ");
    serial.print(mfrc522.uid.uidbyte, hex);
    keyboard.print((mfrc522.uid.uidbyte < 0x10 ? " 0" : " "));
    keyboard.print((mfrc522.uid.uidbyte, hex);


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