iPad connection drops every 3 hours

[Tech Savvy]

I have a client that uses an iPad as a time clock kiosk. I recently updated their network hardware, untangle, 3 unifi 24 port Poe switches, and 3 unifi access points.

I received a call a while back about the WiFi dropping off for the time clock and I checked it out. All seemed good and they can never show me a time when it wasn’t working. So naturally I thought they were lying or at the very least exaggerating to cover for them being late to work... blame the IT guy he isn’t here. When I showed up everything worked just fine the entire day. So I started monitoring it with solar winds (as a network device not mobile device) and it basically just sends pings every so often. Now I come to find out. They haven’t been lying, it really has been going out all the time, I guess when I was in the timing was right.

The problem is the iPad is losing its WiFi connection every 3 hours almost on the dot. It’s down for a few min, and then comes back online. The access points seem to remain up.

It sounds to me like a sleep issue, but the iPad is plugged in and I turned off auto lock after X seconds.

I’ve tried the usual reset network settings and forgetting the network and it was joining but it seems to be not just the iPad but I have reports(without proof) of it happening to other iOS devices too which makes me think it’s something with my set up

Any ideas on what this can be? Here is a log of when it goes down/up you can see a longer gap when he employees come in in the morning (8-830 am) and/or when they clock out/in for lunch


Time clock
9/22
21:52 offline
21:56 online

9/23
00:45 offline
00:52 online
03:41 offline
03:50 online
06:39 offline
06:44 online
13:18 offline
13:38 online
16:17 offline
16:20 online
19:09 offline
19:22 online
22:06 offline
22:09 online

9/24
00:58 offline
01:04 online
03:52 offline
04:00 online
06:49 offline
06:55 online


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[YeOldeStonecat]

I'm thinking some sort of power management on the iPad too.....but to check other things:
*You have bandwidth steering set?
*With 4x APs...have you done a thorough site survey and tuned the channels and TX settings and RSSI? Perhaps disabling the 2.4 radio on at least 2x of the APs if they're relatively close?
*Default 40 wide on the 5.0 or did you lower to 20 wide?

 

[timeshifter]

Wondering if there's maybe some kind of outside interference involved. Maybe some kind of heavy machinery or HVAC or whatever that cycles every three hours.