Hi @Ted9
The first question would be whether it's just your WiFi dropping out, or your full internet connection. Do the lights on your Hub change when this happens on the iPhone/iPad? If so, that's an internet problem and will likely require BT investigation; if not, it's purely a WiFi problem in your own home.
If it's only a WiFi problem, and it happens intermittently, there are a number of possibilities:
- congestion, ie other users/devices clogging up the WiFi. Note that this doesn't need to be another user/device in your home, it can be a neighbour. You can start to investigate this by downoading a WiFi Analyser app to your iPhone - it will show you which channels are busy, and then you can tell your Hub to use a less busy one
- interference from other electrical devices. In particular, if your devices are connecting to the 2.4GHz frequency, microwave ovens use the same fequency and their power output can completely overwhelm the WiFi (happens to my internet radio in my kitchen regularly when the microwave in the utility room is running). There's not a lot you can do about the microwave, but if it's another device causing the problem, replacing a power supply or moving it to a different location might help.
- changing WiFi bands. BT Hubs run two WiFi bands, one at 2.4GHz, and one at 5GHz. The 2.4GHz has longer range and better wall penetration, but offers lower data rates (and see above re microwaves). The 5GHz offers higher data rates, but less range and is less able to penetrate walls and other obstructions. Your device chooses which one to connect to - it's possible your device is originally choosing 5GHz, then losing the connection - it should ideally then switch to 2.4 GHz, but they don't always behave ideally. You don't mention which Hub you have - on earlier Hubs (before the SH2) it's possible to separate the two bands so that you can choose which one your device connects to.
Good luck!
[EDIT: typos]
