title: What APDU command gets card ID
body: <p>Which APDU command gets 7 bytes of the card ID?
  I use T=CL (ISO7816) protocol with ISO14443 layer. On detect card I can see only 4 bytes of the card ID.
  I found that this should be the APDU command to get a card ID.
  For example its:<br>
  <code>0xFF, 0xCA,  0x00, 0x00, 0x00</code><br>
  but result of this command is: <code>6E 00</code>, that on specifications of APDU answers tell that <i>&quot;Class not supported&quot;</i></p>
  <p>Then I found that its APDU command may be as:<br>
  <code>0x00, 0xCA,  0x00, 0x00, 0x00</code><br>
  this command return <code>6A 88</code><br>
  where <code>6A XX</code> - <i>&quot;Wrong parameter(s) P1-P2&quot;</i> and <code>88</code> - <i>&quot;Referenced data not found&quot;</i><br></p>
  <p>What you think about it?</p>
  <p>Thank you!</p>
  <p>P.S. All command as: <code>CLA, INS, P1, P2, LenData, Data</code><br>
  Other my command work normaly (such as sellect aplet and work with it), problem only at getting card ID</p>