06-30-2018 06:23 PM
I've wrestled with this same problem and was able to fix it.
For some reason these devices don't get along well with wifi networks that have special characters in the network name. For example "Sam's Wifi Network" can create problems because of the apostrophe. If you have anything other than numbers and letters in your network name (and maybe even wifi password), I'd try renaming it and see if that fixes it.
I'd additionally make sure your smart switch is connected to a 2.4 Ghz network. It is my understanding that Wemo mini smart switches only support 2.4Ghz networks and not 5Ghz so that could also be your problem.
I've had my fair share of problems with these things but following these two rules has helped with my devices. Hopefully they should get your's working as well!