WiFi Backscatter – Connecting RF-Powered Devices to the Internet (2014) [video]
Looks like a great proof of concept, but I wonder whether the off-the-shelf WiFi devices will need to support some sort of protocol to enable this to work? I didn't see anything in the video about how they specifically integrate with WiFi, but I'm assuming there will need to be some sort of broadcast and then response read. Either way, very interesting project from both a software and electronics point of view.