title: programmatically control bluetooth status light
body: <p>Is it possible to control the bluetooth status light on modern laptops, and how would I go about this?</p>
  
  <p>If it's manufacturer/model specific, any tips on finding details for particular models?  I'm particularly interested in Dell and Asus models.</p>
  
  <p>EDIT: just to be clear, I don't want to control the bluetooth hardware at all, just the status light.  In fact, the status light often exists even when there is no bluetooth radio install.</p>