A few devices not connecting to WiFi

[RamJen]

All of my devices were successfully connected to the WiFi, but since lunchtime on Tuesday, 9th September, some of them have stopped connecting

[caesarome]

@RamJen 

Try a reboot of your broadband hub at the mains.

[RamJen]

Thank you for responding. 

I have rebooted the WiFi again and still no change. The device is not connecting to the Ring doorbell and my WiFi extender which is connected to the hub via WAN/LAN port. 

[JimM1]

@RamJen Does your wifi extender work as a wired backhaul device, some do not, as for the Ring doorbell do you have a sufficient 2.4Ghz wireless wi-fi signal to reach it, easy check stand outside with the doorbell, if your mobile loses connection wi-fi is not reaching the area!

You do not say which sky Hub you have but the Port 4/wan is good as a Lan port as long as you are not on a FF connection will work fine as a Lan port, if you do go and set it as a WanoE then it can ONLY ever be a FF connection, all Lan functonality will cease as it wants Wan Connection Only!