There’s a huge market for 433 MHz alarm system hardware out there, 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 ...

In this security system is based on the embedded system along with GSM and sensor networks. The human movement is detected using the PIR sensors.

It may not be as fancy as Skylink, or even the iSmartAlarm security system. But, for the cost of a Rasberry Pi, Pi Camera and PIR sensor, you could make a couple of these alert systems and still ...