@AwesomeDad Try a new HS200 first. Electronics do have a life span and can fail at any time. I have been using TP Link switches and modules for over 7 years now and none have failed yet. If you have...

@Engineer_Dan It appears your existing wall switch is a 3 way switch. Does that light turn off from another location? If it does you may need HS 210, 3 way switch 2pk (you only need to use one HS 210...