A PIR sensor is used to detect motion. It sounds an external 12v Alarm horn or loud buzzer as well as sends an SMS message to your phone via IFTTT (www.ifttt.com).

These RF433 Units from M5Stack are perfect for home security and automation. Lets mashup code from a couple of example sketches in the M5Stack Github repository and make a motion sensing alarm.

from PIR motion detectors to door and window sensors. If you want to put them to work, all you need is a receiver, a network-enabled microcontroller, and some code. In his latest video ...

With solar efficiency, dual motion detection, and simple setup, the S2 is designed for eco-conscious, hassle-free security.

A home security system can help keep your house safe, from cameras to smart doorbells and motion sensors. While you can go for professional installation services, we like DIY systems for their ...

one entry sensor and one motion sensor. Sometimes you can get a free Smart Alarm wireless indoor security camera and a free trial of professional monitoring if they're running a promotion.