title: Bluetooth Low Energy Characteristic Value from Byte
body: <p>Background:</p>
  
  <p>I am following <a href="http://www.raywenderlich.com/85900/arduino-tutorial-integrating-bluetooth-le-ios-swift" rel="nofollow noreferrer">this tutorial from raywenderlich</a> about connecting a bluetooth low energy shield to my project. I am using the Adafruit BLE friend.</p>
  
  <p>Question:</p>
  
  <p>I cannot figure out how to specify the UUID for the BLE friend. Here is a picture of Adafruits information about the characteristics:</p>
  
  <p><a href="https://i.stack.imgur.com/pzXaP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/pzXaP.png" alt="Adafruit&#39;s documentation on the characteristics"></a></p>
  
  <p>Here is <a href="https://learn.adafruit.com/introducing-adafruit-ble-bluetooth-low-energy-friend/uart-service" rel="nofollow noreferrer">the link to the page on Adafruits page</a></p>
  
  <p>How can I format the characteristic UUID so it is in this style: F38A2C23-BC54-40FC-BED0-60EDDA139F47</p>
  
  <p>Thanks for any help,</p>
  
  <p>Joel</p>