title: What is the difference between CBCentralManagerStatePoweredOn and CBPeripheralManagerState?
body: <p>Not getting What is the difference between CBCentralManagerStatePoweredOn and CBPeripheralManagerState? At what situations we should use these variables? 
  Can anyone make me understand through Objective-C samples/code?</p>
  
  <p>I am developing an App, where i should know bluetooth power status of my iPhone device through Objective-C. I just want bluetooth power status(ON/OFF). </p>