Ekin Labs says its free software can build a home-security system using hardware you already own

LAS VEGAS—You can’t swing a burglar’s bag of loot at CES without hitting some new smart-home security system. Amidst all the cameras, sensors, and touchscreen control panels, Ekin Labs’ exhibit stood out: It’s has a software solution, dubbed Hi WiFi, that transforms the hardware you already own into a sophisticated motion sensor array. And it will