This is just in the thinking process now, however this is what I am needing.

Right now this is what we have. In our service trucks we have a video camera that records to an SD-Card and this device is also wireless. Each device has it's our SSID (Example truck #1, #2, #3, Etc.) What happens now is when the truck parks in our parking lot from a central computer in the office we can login to each device and pull over the video files for that day from each truck.

What I am wanting is for the central computer to know when one of the wireless networks has just come into range and at that point automatically login and pull over the files from the SD-Card. I am sure I can do all of that, what I don't know is what would be needed for the central computer to auto sense the wireless network coming into range and then logging into that network.

Thanks for any Ideas!!!