Ignore the soap example and just focus on the underlying Wi-Fi backscatter technology. There are many applications in extreme low power or no power devices. Most are missing the point.
More details here. http://iotwifi.cs.washington.edu/
660 karma · joined November 30, 2016
More details here. http://iotwifi.cs.washington.edu/
https://www.theatlantic.com/national/archive/2014/03/startin...