title: TI Sensortag, how to use push buttons?
body: <p>I am working with the new <a href="http://www.ti.com/ww/en/wireless_connectivity/sensortag/index.shtml?INTC=SensorTag&amp;HQS=sensortag-bt1" rel="nofollow">TI Sensortag</a>.
  I'm trying to do a simple iOS app that reads the state of those buttons. I've found a lot of guide, tutorial etc. about using Sensortag's sensors (humidity, IR Temperature, ...) but no one talks about push buttons on his top.
  Has anyone an idea about them?</p>
  
  <p>Tank you very much</p>
  
  <p>Reda</p>
  
  <p>P.S. I'm using an iPhone 5</p>