title: using iPhone to send data with btstack
body: <p>I'm developing an aplication which send a few data from an iPhone to a external bluetooth module. I have been reading the information in this forum but I still don't understand how to use btstack in order to develop that app (if it is possible). I'm using xCode enviroment to develop it. So I was wonder if somebody has a kind of simple and basic code to understand the use of btstack (either a project). I will be greatful of any help that you can give me in this topic.</p>
  
  <p>Best regards.</p>