A light switch is the simplest of electrical devices. Flip the switch, electricity flows. Flip it again, electricity stops. Lights on, lights off. That’s great for a small room with one entrance.

Wemo adds three-way capabilities to its Wemo WiFi smart switch, providing homeowners extra flexibility and saving them some cash by eliminating the need for a companion switch. Wemo has handily solved ...

Q: At either end of my staircase I have a light switch that turns the staircase light on and off. The problem is that the switches don’t work correctly anymore ...