Not all "Smart Home hacks" have to be automated, or even high-tech. Sometimes the handiest, most useful hack is also the simplest. Consider, for example, the Big Jammer Door Brace. It's a fantastic security device that I've used for almost 20 years, in 3 or 4 different homes. In addition to working with any door that opens inward, it works with sliding glass doors too. Well worth having and provides much peace of mind. It's also available from Amazon.