They use magnets and a reed switch to sense if the door or window is opened ... The NESDR runs a tool called RTL_433, which can decode the sensor signals, and spit out MQTT messages to interface ...

The best home security systems (such as those from Vivint or ADT) come bundled with several useful gadgets, including motion ...

The Vivint Smart Home security system is a full-blown home security system that gives you 24/7 monitoring and full control over door locks, cameras, thermostats, and lights. You can even monitor ...