Note:  We bought 3 switches, and now we have 2 that no matter what we do, will not reconnect.    We have power to the switches, and can connect via Bluetooth throught my phone app, BUT regardless of what I try, it will not connect to the wi-fi.  I have one more HS200 switch in the same room working perfectly.   This is the second of the 3 switches that have failed within less than 2 years  this way, and will not reconnect.  I have done factory resets, set the router to 2.4ghz, and completely killed power to the switch.  Nothing works to enable me to connect the wifi.  I have completely removed the switch from the App, reset the modem, etc.  Everyting mentioned on the internet I have tried.    Upon replacing the HS200 with a new HS200, it worked perfectly.   So what is the next step?   Not very happy that I've now had two of these fail within less than 2 years.  I have multiple different KASA wi-fi devices in my house working fine, except for these light switches.  With this switch, if I manually turn it on, withinj a few seconds it turns itsefl off.   Pleas help!