Wifi is a limited resource, people!

bp2008

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It seems like there are always a few threads where someone is running multiple wifi cameras, having connectivity problems, and not understanding the cause.

Let me use an analogy to explain. Imagine 4 people living together in one house.



As long as it is quiet in the house, each person can communicate reliably by talking (e.g. by transmitting sound waves which the other people hear). They can generally speak whenever they feel the need, and rarely interrupt each other by accident. In this analogy, people are wifi devices, because wifi devices communicate the same way as people (just at much higher frequencies). They transmit bursts of radio waves which the other devices can hear.

=


As long as the air is quiet, everything works great.

:peaceful:




Now imagine one of these people, lets call him Bob, buys a boombox.



Bob places this boombox on the kitchen table, and plays talk radio from it continuously, 24 hours a day, loudly enough that he can understand it clearly from his bedroom. Now, people trying to talk have to compete with the boombox. They may have to repeat themselves in order to be understood, making communication less efficient. They must take advantage of any pauses in the boombox's transmission. The boombox is equivalent to a wifi camera, and has a similar effect on the other wifi devices in the house.

=


Now, Bob isn't happy with just talk radio. So Bob gets a second boombox for classical music. This time, bob mounts the boombox outside, above the front door of the house, and again cranks up the volume so he can hear it clearly from his bedroom. Now, the people inside the house have two continuous noise sources interfering with their verbal communication.

=


But Bob doesn't know when to quit.

Bob buys a third, fourth, and fifth boombox, and places two in the backyard and one on the side of the house. All playing loudly enough to be clearly heard from Bob's bedroom.


=


Bob's mind can barely separate all the signals coming in. Other people in the house can't communicate effectively, and even the neighbors are beginning to have problems.

You would never do this with boomboxes, so why would you do it with wifi cameras?
 
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