8 DIY Home Security Devices

No need to buy separate cameras and alarms: This hub has an integrated, 180-degree HD video camera, microphone with two-way audio, and a siren. It also monitors temperature and humidity, and for extra security, you can add door and window sensors. If there’s trouble, Piper can message, text, email and call you.

Iris is a hub that works with smart devices, letting you control them from your phone. The Safe & Secure kit includes a motion sensor and two door/window/cabinet sensors; you can optionally add more sensors, cameras and even smart locks. The app will alert you if any are triggered.

A small but powerful HD camera with two-way audio, Dropcam works with an app to let you see what’s happening in your house via your smart devices or computer. It sends emails or notifications when it detects movement. Crystal visuals plus night vision make this a great choice for monitoring pets and babies, too.

A series of products intended to make it easy to automate your home, WeMo lets you control everything via app — from cameras to motion sensors to lights. Schedule your house to light up at a certain time, lock or unlock, check cameras or even switch on the stereo, so it’s like you’re home even when you’re not.