title: Sending command to Bluetooth LE Device from a iOS App
body: <p>I'm building a simple IOS app for interacting with a Bluetooth LE device. </p>
  
  <p>Main steps ( Connecting, discovering services, discovering characteristics and reading characteristics' values ) are done rightly.  </p>
  
  <p>Now i'm searching for a tutorial/example for <strong>sending</strong> <strong>command</strong> to the Bluetooth LE device i'm connected on. </p>
  
  <p>I'm searching in the Apple Developer Guide but i'm not finding anything. </p>