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Wi-Fi has traditionally been considered a power-consuming communication system and has not been widely adopting in the sensor network and IoT space. We introduce Passive Wi-Fi that demonstrates for the first time that one can generate 802.11b transmissions using backscatter communication, while consuming 3-4 orders of magnitude lower power than existing Wi-Fi chipsets. Passive Wi-Fi transmissions can be decoded on any Wi-Fi device including routers, mobile phones and tablets. Building on this,doi:10.1145/3036699.3036711 fatcat:eju2x6vj4zakdhmxj2pnnbnzbu