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 ...

Smart switches are great, but you can’t just drop any old thing into a three-way switch that turns a light on and off from two different locations. Today, Amazon is selling TP-Link’s Kasa Smart ...