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.

A structured meal plan consistently supports a healthy lifestyle, regulating body weight and reducing the risk of diabetes ...

It hosts the user interface in the form of buttons, LEDs, and a graphic LCD ... to the Arduino compatible ATmega328 microcontroller on the back. There is also a piezo buzzer for your alarm needs.