In a world of increasingly app-controlled devices (I need three different apps just to turn my lights off at night, for example!), what was once a convenience soon becomes overbearing. The Deus EM Machina system augments a regular smartphone with a large copper antenna and a custom PCB, which amplifies electromagnetic (EM) emissions from electronic devices, allowing a custom background service on the phone to identify them and launch the appropriate app. In their study, they demonstrated iden...
