5 smart home devices that save you money (and 3 that are a waste)

The secret to smart home technology isn’t making your house feel like a sci-fi movie—it’s focusing strictly on your return on investment. A handful of smart devices will pay for themselves within a year or two through lower utility bills and prevented disasters. Others, however, are expensive novelties that will never recoup their cost. Here are five smart home upgrades that deliver genuine financial savings, along with three overengineered gadgets you should skip. Smart dev...