title: Bluetooth SPP to a Raspberry returns looping weird values
body: <p>I'm running out of ideas, I finally got a connection to a Bluetooth Barcode Scanner via SPP, but once I'm listening to the connection with</p>
  <pre><code>sudo cat /dev/rfcomm0
  </code></pre>
  <p>It's repeating the scanned code, everytime prepending some ^JJJ values:</p>
  <pre><code>^J^JJ^JJJJ^J^4000539103766
  
  ^J^JJ^JJJJ^J^4000539103766
  
  ^^J^JJ^JJJJ^J^4000539103766
  
  ^J^J^JJ^JJJJ^J^4000539103766
  
  ^^J^J^JJ^JJJJ^J^4000539103766
  
  J^^J^J^JJ^JJJJ^J^4000539103766
  </code></pre>
  <p>and this continues, sometimes till it stop by itself or till I kill it.</p>
  <p>Anyone has ever seen this?</p>