Yeah, I think wiring them is the only solution to this problem.
We've only got three (well, had one and bought two more this summer - that's when the trouble started).
The first one I got had trouble connecting with the wireless network, so Apple support said to reboot the main router. That is, shut down the entire network while we reboot for one Apple TV. So...OK, I get it, Apple is a CONSUMER company and we're trying to use their products in a school...in spite of that, so far, it has been worth the effort.
But YESTERDAY I got that message about too many devices on the network and to "disconnect a device..." (you know the rest).
So, I called Aruba, knowing that it was a wireless issue and that I've had issues with them and, particularly
Bonjour. Aruba appears to be a Windows only network - would that I would have known that three years ago. But Aruba TAC has NO CLUE what the issue is. So I called Apple Tech Support and they have NO CLUE - weren't even aware of this posting, what, six months ago? (Shows you how much they read and value the forum - we're on our own, boys and girls!)
So...I wired the front of the school Apple TV to a nearby wireless access point and now it's a steady as a rock. But prior to that I actually stood in front of the ATV and watched as it connected, then disconnected, then connected, then disconnected (ad nauseum). Interferrence? Well, maybe, there are only about 150 rogue networks detected in the immediate vicinity - but Aruba ASSURED ME that their WAPs were sophisticated enough to recongnize that and filter them out. (Maybe not?)
So the ATV at the front of the building ocassionally just drops off the network. I can tell because we run a Flickr slideshow on it all day long with announcements and stuff. When I go by the TV and see the thumbnails and no slideshow, I know it has dropped off the network. Usually I can reconnect it. But that's not good enough.
Finally, yesterday, a teacher called me who has an ATV (long story on how she got that) and said she was not longer connected to the network. A shudder ran through my body as I expected (and realized) the worst.
So, my installer is coming tomorrow to wire her ATV into the WAP in her classroom. But TODAY, I have to call Aruba and enable the additional port since it's not enabled by default.
I'll tell you, every day, I get this horrific feeling in the pit of my stomach that this whole world of technology we have built is held together with bailing wire and duct tape and that it just has to blow at some point.
Then I watch Bob Ross do his paintings (and a NEW KID on the block - watch out for him - Kevin Hill - this kid takes Bob Ross to the next level and he's only 18 years old) and think - "What the heck am I doing here, anyway? Why am I not home painting?" But them I start feeling guilty that I'm leaving the school in the lurch. Who will stand up to these bozos who don't have a clue what's going on and, further, don't seem to care, yet, get this, think they are doing a GREAT JOB! I'm telling you, I'm living on Superman's Planet Bizarro!