title: Python barcode scanner serial trigger
body: <p>I'm messing around with a Honeywell 4600 barcode scanner in python, configured as a serial device. All is well and I can read barcodes with it, but I would like to test the serial trigger option instead of pressing the trigger all the time. 
  The manual is very brief on this feature and only states "SYN T CR" has to be written to the device to activate the serial trigger</p>
  
  <pre><code>ser.write('SYN T CR')
  </code></pre>
  
  <p>does not seem to do much.</p>
  
  <p>Can someone point me in the right direction? Thank you!</p>