More and more people bring more and more “smart” devices into their home to make their lives easier and more convenient. But many find there’s one little problem with all these smart gadgets. After finally getting everything set up, most of these devices depend on an app even to do something as simple as turning a light on or off. What happens when your smartphone is charging? Or you’ve handed it to your kids to play a game? Or you have a guest visiting who doesn’t have the app?