title: iOS - background app
body: <p>I have an iOS app, that is an TCP server, that receives a command an talks to something on the devices hardware.</p>
  
  <p>Example commands are: </p>
  
  <p>1: make a connection using blue tooth</p>
  
  <p>2: get devices mac address</p>
  
  <p>3: read from an audio card reader</p>
  
  <p>I need this app to always be running. Can someone advise the best course of action</p>