We present the first power over Wi-Fi system that delivers power and works with existing Wi-Fi chipsets. Specifically, we show that a ubiquitous piece of wireless communication infrastructure, the Wi-Fi router, can provide far field wireless power without compromising the network's communication performance. Building on our design we prototype, for the first time, battery-free temperature and camera sensors that are powered using Wi-Fi chipsets with ranges of 20 and 17 feet respectively. We also demonstrate the ability to wirelessly recharge nickel-metal hydride and lithium-ion coin-cell batteries at distances of up to 28 feet. Finally, we deploy our system in six homes in a metropolitan area and show that our design can successfully deliver power via Wi-Fi in real-world network conditions.
Cite
@article{arxiv.1505.06815,
title = {Powering the Next Billion Devices with Wi-Fi},
author = {Vamsi Talla and Bryce Kellogg and Benjamin Ransford and Saman Naderiparizi and Shyamnath Gollakota and Joshua R. Smith},
journal= {arXiv preprint arXiv:1505.06815},
year = {2015}
}