I have something similar, yet very different running that accomplishes much the same thing. I have a web server running on the arduino and it is contacted directly to report status and change the state of various things. For example, it knows if my garage door is open or closed and presents a button to change the state of the door. If the user clicks the button, it opens(closes) the door and reports back that it did. This is a much easier approach than the interaction you describe.