The problem is the actual light I want to control, not the light on switch. Is there a way to verify if my wire is "power through fixture"? If I don't connect the white wire, the symptom is the same.

Model : Hardware Version : Firmware Version : ISP : Hi, I have connected the smart switch with my iphone app, and when I tried to turn on the switch, the lights blinked once, but off right after that...