Precisely. One would think that the local network could be polled, but I am unaware of the difficulty. My idea is to have a program that would poll the range of addresses the router addresses locally and see what is connected. Is this rather variable throughout the router world?
Basically, all devices hook up to my router, their MAC address, type of device, time Comma separated values to drop into Excel. Polling could be done at intervals requested 1 min, 5 min, ??, 1 hr, etc. Any more would be great.