3 ms·
No battery wifi devices
- teh_klev 9y agoPrevious discussion: https://news.ycombinator.com/item?id=15861123 https://news.ycombinator.com/item?id=15861123
- Zee2 9y agoI'd like to repeat this point from the last time this was discussed: these no-battery devices do NOT "connect" to the WiFi protocol in any way. They simply modify the electromagnetic characteristics of existing packets/signals. This still requires some powered device to interpret these backscatter signals.