Ok - had a bit more time to diagnose this morning. Ever since updating my WyzeCam V1 cameras with the new firmware - I’ve had MAJOR issues on my 2.4Ghz network. Again - nothing has changed on my wifi router - no firmware, settings, etc.
I haven’t even been able to connect Raspberry Pi computers or ANY other device (including iOS devices) to my 2.4Ghz network since the camera firmware upgrade. After upgrading to iOS 12, I COULD connect to the 2.4Ghz network - but after upgrading the cameras - COULD NOT.
Experimenting, there is an option to “Enable 20/40Mhz Coexistence”. It was enabled. Has been enabled for a year (when I bought the router). I disabled it and booted the router. Magically - I can connect devices OTHER than my cameras to the 2.4Ghz network. This setting is to allow mixed 802.11 b/g and 802.11 n devices to intermix (apparently later 802.11n devices operate at a higher frequency). By NOT enabling this, it means all my 2.4Ghz speeds are reduced to about 192Mbps across the board.
And no, there are no other wifi networks in the area. I live in the country - and I can only “see” ONE other wifi network - and only when I go outside. It’s a neighbor who lives about 250 yards away from my house.
As I said in my first post - after updating the cameras it appeared that my 2.4Ghz network was “jammed”. Resetting the router allowed the cameras on - but nothing else. The 5Ghz network was unaffected, and devices that could support 5Ghz wireless were fine.
My assumption here is that something in the camera upgrade is messing with the 2.4Ghz radio in the camera, and causing issues with my wifi network.