I had this idea of placing a Estimote at the entrance of a room with only one entrance and create a app that when the user enters the room the app triggers my backend business logic into sending the person a greeting message and remembering on the server that, that user is in the room.
When the person leaves and passes by the door again the app triggers the backend again and because it remembers that this user was in the room and recognises that she is leaving (because its the second time she has passed by the beacon) sends her a goodbye message.
Is this possible ? Any developers care to tune in on this ?