Carl wrote

  @SomersetM 

 

Can you share an image of how you have the switch wired? 

  @Carl 

Hi ,

Her's an image for the wiring..

The middle single pole swtich was replaced by the TAPO S500 . The original toggle switch had only 2 lines( line and load?)lke shown on the left toggle switch.

Here, the right yellow nut wth green line is the ground and the left yellow one with white lines is the neutral. The right orange nut is the load line(verified) and the other orange is a line ( to the light bulbs).

Hope it helps.

 

Thanks.

Thanks.

Hi, Soemhow, I found another neutral lines hiddden at the back .of ther irght toggle switch. When I connected to this neutral line, the light turns on. But I don't know why there are 2 neutral line nuts. Thanks .