This is a really awesome development.<p>Several news stories tie this feature to Phillips Hue lights, or Zigbee lighting generally. I think this is only because that's what has a lot of market penetration. As far as I can tell, ambient sensing would leverage all your Zigbee devices since it's looking at signal interference.<p>So, when they talk about firmware updates, is this really FW updates to the Zigbee endpoints, or are they just talking about the controller that processes all those LQI numbers?<p>If it works, this could allow really refined zone occupancy detection depending on how many devices are covering an area. I could see a lot of false positives and limitations to only very course grained detection - large bodies moving through an area. I don't know if a pet moving low to the ground and all would be disrupting zigbee signals enough to be detected.<p>Anyway, super cool. Anonymous (for subject) and low profile (for instruments) presence/occupancy/motion detection needs all the help it can get.