I already have my home WiFi but I was wondering if it would be possible to create a temporary pass for when the guests come to visit? I would like to give them a password to the network but I would want it to die off after say 30 minutes. Is something like this possible? 

PS I can't modify the firmware on the router.


Question: Is there a good field methods book that covers terrestrial ecology?
Answer: Take a look at Field and Laboratory Methods for General Ecology by James E. Brower, Jerrold H. Zar, and Carl N. von Ende.

If you are only interested in plant sampling techniques, an great resource published by U.S. Bureau of Land Management is Measuring &amp; Monitoring Plant Populations by Caryl L. Elzinga, Daniel W. Salzer, and John W. Willoughby.

Another great resource that covers wildlife research and management techniques (2 volume set) is The Wildlife Techniques Manual published by The Wildlife Society and edited by Nova J. Silvy.