While PIR sensors can be used with Arduino and other microcontroller boards, those best-suited for hobby use are smart enough to perform simple tasks without any programming.

Monoprice also sells a motion sensor, but that model is unable to trigger routines (only the Stitch contact sensor can), so you still need a hub if you want to use motion sensors in your home.

Using your smartphone to control smart devices is convenient. But if you want to automate your home, try smart sensors.

The Verge, which spotted the leak, mentions that this new feature will use “the bulbs’ Zigbee radios to detect motion between ...

If your iPhone's sensors aren't working correctly, you may need to calibrate them. Here's how to calibrate an iPhone's brightness and motion sensors.