With Ambient Sensing, groups of Zigbee devices—like smart lights—can work together to detect motion in a given area.

The Connectivity Standards Alliance teased an update to the Zigbee protocol The update will let Zigbee devices like Hue lights work as occupancy sensors We don't yet have a timeline for when the feature might be rolled out Your Philips Hue lights could soon get a lot smarter thanks to a free firmware update that would let them do double-duty as occupancy sensors.

Ambient Sensing for Zigbee lights allows zone-based lighting setups with just a firmware update and no additional hardware. Philips Hue products may support Ambient Sensing, requiring at least three lights.