johntwinkletits@lemmynsfw.comtoTechnology@lemmy.world•Researchers discover battery-free technology which harvests power from radio and Wi-Fi signals for low-powered devicesEnglish
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2 months agoDefinitely not new. This is how RFID tags work. They harvest energy from the transmitter to power the circuitry in the tag to send back a response.
Cockpit is what I use. Simple setup and shows all sorts of graphs and statistics. https://cockpit-project.org/