title: Understanding ibeacon distancing
body: <p>Trying to grasp a basic concept of how distancing with ibeacon (beacon/ Bluetooth-lowenergy/BLE) can work. Is there any true documentation on how far exactly an ibeacon can measure. Lets say I am 300 feet away...is it possible for an ibeacon to detect this?</p>
  
  <p>Specifically for v4 &amp;. v5 and with iOS but generally any BLE device.</p>
  
  <p>How does Bluetooth frequency &amp; throughput affect this? Can beacon devices enhance or restrict the distance / improve upon underlying BLE? </p>
  
  <p>ie</p>
  
  <pre><code>               | Range       | Freq       | T/sec      | Topo       |      
                 |–—–––––––––––|–—––––––––––|–—––––––––––|–—––––––––––|
  Bluetooth v2.1 | Up to 100 m | &lt; 2.481ghz | &lt; 2.1mbit  | scatternet |
                 |-------------|------------|------------|------------|
  Bluetooth v4   |     ?       | &lt; 2.481ghz | &lt; 305kbit  | mesh       |
                 |-------------|------------|------------|------------|
  Bluetooth v5   |     ?       | &lt; 2.481ghz | &lt; 1306kbit | mesh       |
  </code></pre>