title: Bluetooth packet capture on Android
body: <p>I use the technic described <a href="https://www.nowsecure.com/blog/2014/02/07/bluetooth-packet-capture-on-android-4-4/" rel="nofollow">here</a> to capture the Bluetooth paquets exchanged between my Android phone and a device (a very simple device).</p>
  
  <p>I can capture a lot of scanning and the pairing between the two devices, but I can't see any of the later exchanges, only the scanning.
  Moreover, just after the pairing there is a huge gap in the time, and other gaps later when I think data are exchanged between the device.
  For exemple, the timeline is in this form:</p>
  
  <ul>
  <li>0-8s: scanning (<code>LE Set Scan</code>)</li>
  <li>8-15s: pairing</li>
  <li>80-120s: scanning</li>
  <li>180-200s:scanning</li>
  </ul>
  
  <p>I'm sure that the gaps correspond with data exchanges, but I don't know why I can't see the paquets.</p>
  
  <p>I've tried simple file exchange between the phone and a computer, and I've been able to see the paquets containing the file.</p>