/technologies/sensor-technology/b/blog/posts/upgrade-zigbee-devices-and-turn-them-into-motion-sensors-with-a-firmware-updateThree or four Zigbee devices grouped within a room act as virtual sensors that detect human movement, turning the lights on/off. (Image Credit: Ivani ) Zigbee bulbs and plugs have gotten a whole lot better. With a simple firmware update, these smart en-USTelligent Community 12