Post #2459294
2026-05-10 19:26 UTC
@cinebox@masto.hackers.town ah that would make a ton of sense. Wonder how they’re transmitting it.
Replies (1)
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@ret@furry.engineer 2026-05-10 19:29
@cinebox@masto.hackers.town saying that, I’ve worked on systems for that (albeit for use in combined sewage outflows) and they use an ultrasonic thing that reflects off the water. They ping every couple of minutes. Last a few years on battery transmitting over cellular.