title: Fire an event on button click - on a TI CC2541 Keyfob device
body: <p>I am new to BLE communication and as for now I am working on an android
  <br> to communicate against the TI CC2541 keyfob device.
  <br> My problem however is that I want to know when the user clicks on the Keyfob right side
  <br> button (the one which is normally used to transmit a discovery signal) after I am connected to the device<br>
  I have used <a href="https://github.com/StevenRudenko/BleSensorTag" rel="nofollow">Steven Rudenko's Github project</a> to understand the communication basics
  <br>But I CANT FIND NO WHERE (Not even on TI's official Documents) how I can tell (On the client side)<br> If the right button is pressed.
  <br>Is it a service? do I have to register for some notification from the device?
  In case someone have a general guidance I would really appreciate the help.</p>