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.

Making your own security system isn't too hard, but if you'd like a super cheap and simple method, Instructables user deba168 shows how to make a wireless motion detector with an Arduino.

Installing your home security system yourself can save you hundreds of dollars. These are the best DIY options, with and without professional monitoring.

Ring Alarm is a spectacular DIY home security system with the potential to be much more, but don’t buy one if what you’re really looking for is a smart home solution. Ring builds some of our ...

The best home security systems are 1. SimpliSafe, 2. Ring, 3. Abode, 4. Arlo, 5. ADT and 6. Vivint. They include sensors, detectors, cameras and more.