title: Sphero: getting real time location data to stop sphero (android)
body: <p>I am trying to build an android application for sphero where I need to stop sphero in certain zones of the room and I am trying to do so with the <code>locatorData</code> using a <code>DeviceMessenger.AsyncDataListener</code>.</p>
  
  <p>I have noticed, however that it is impossible to tell where he is while he is still rolling and stop it when it is in a certain set of coordinates, because the data arrives with great delay. He basically stops much farther and I can see the coordinates increasing with delay on screen. I know the communication is asynchronous and i could somehow be losing some data during communication but I thought that by giving him a window around the coordinates I want him to be I would be able to stop him more or less in that zone, but it doesn't look like it works decently.</p>
  
  <p>For now, the only solution I've come up with is to send a roll command, calculate the amount of time it needs to roll to get to those coordinates based on velocity and send a delayed stop command, but I don't like this solution and I don't think it's going to work correctly in the long run, when I implement all the features I need. Does anyone have any suggestions about the <code>locatorData</code> and how to use it in this case?</p>