title: How to measure distance between two iphone devices using bluetooth?
body: <p>I'd like to do something in the following using bluetooth.</p>
  
  <ol>
  <li>Measure and display how far my iPhone is from another iPhone.</li>
  <li>Display direction of my iPhone.</li>
  </ol>
  
  <p>For example,</p>
  
  <p>I'd like to display something in the following on my iPhone application.</p>
  
  <p>My iPhone is connected to another iPhone:Harry's iPhone.</p>
  
  <p>In this case, </p>
  
  <ul>
  <li>Distance  : 3m 45.3cm (Accuracy:milimeter)</li>
  <li>Direction : North East(one of 8 available directions)</li>
  </ul>
  
  <p>Does anyone know how to do this?</p>