There’s a huge market for 433 MHz alarm system hardware out there ... that pulled them all together into a complete home automation system on the cheap.

He’s using an Arduino Uno and an Ethernet breakout board to hook it up to the network. This allows him to send text messages to himself when the alarm system is armed, disarmed, or triggered.

The alarm only stops when you press the push ... to monitor for light sources from other directions. Making an Arduino-powered automatic trash bin that opens and closes the lid for you is a ...