What would be the best way to have a server recognize when a specific mobile device (cell phone, iPad, etc.) connects to the network (wirelessly, of course)?
As an example situation, a person has his home wifi network properly configured on his cellphone. When he gets within range of the router, it would connect (nothing new about that). Upon connection to that router, his home server would launch a certain program (or throw a notification, write to a file, etc.).
I thought that a possible solution would be a network-hosted custom "web app" that would be launched from the phone so that the server would recognize the page was called. However, if this could be done when the phone connects automatically, that would be best.
Any thoughts or alternate solutions would be greatly appreciated, so thanks in advance!