@RBC Do the plugs still work with the KASA App? If not, being all stopped at the same time, I would look at the router WiFi settings. You may have received an update which set the WiFi to WPA3...

@aputschoegl TP-Link does not make a Combination Double Switch.

@suavemom Your Welcome Glad to be of help

@suavemom Yes you can replace a two wire dimmer switch with a HS200 as long as there is a neutral wire in the box. As to the number of devices, that is a question for the company that makes your...

@crazycowboy45 The orignal switch has 3 wires, sound like it is a 3 way switch.

@Alex0604 Maybe your router recevied a update and upgraded the WiFi to WPA3 Personal If it did set it back to WPA2 Personal Let us know how you make out