@Bondo2k Your wiring diagram may not be correct. Power through fixture is shown in the 3rd diagram on 3 way switch wiring, and if that's what you have you don't have a neutral line available in your...

AutomationManager, an aftermarket app available from google play, can be run as a hub/server and will log power consumption information (and pretty much anything else about these devices) to google...

Sorry, didn't see MAC mentioned and assumed... If the MAC folks say WPA2 isn't supported then a low end router would be a much better/safer/inexpensive choice. I definitely would not host an open...

Or look for an aftermarket app, many can do this.

Check with a windows forum/community. Unless it's a pretty old version of windows it should support WPA2 in hotspot mode. For Win10 it's in the wifi properties hotspot settings under "Edit".

It can also happen if you've prevented the devices from reaching the internet - they need to contact an NTP server to get the current time and will throw this error if they cannot sync.