[riobard]

One of the culprits I encountered is that some of the IoT WiFi chips cannot do proper authentication if the AP is using WPA2/WPA3 mixed mode (very common for WiFi6 to increase security with modern devices while keeping backwards-compatibility). The flawed chips can initially connect successfully but disconnect after a few days.

Solved it by creating a dedicated IoT SSID advertising just WPA2 w/ AES and only on 2.4GHz w/ 20MHz (you shouldn't use 40MHz on 2.4GHz anyway for god's sake).

Here're some useful tips to tune WiFi for IoT https://www.wiisfi.com/#iotconnect

[supakeen]

Thanks, I've written that one down in my notes as well it definitely fits the superstitions because it sounds like it should work well.