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xkcd #3109: Dehumidifier
(imgs.xkcd.com)
Title text:
It's important for devices to have internet connectivity so the manufacturer can patch remote exploits.
Transcript:
[A store salesman, Hairy, is showing Cueball a dehumidifier, with a "SALE" label on it. Several other unidentified devices, possibly other dehumidifier models, are shown in the store as well.]
Salesman: This dehumidifier model features built-in WiFi for remote updates.
Cueball: Great! That will be really useful if they discover a new kind of water.
Source: https://xkcd.com/3109/
This is the around the long way method, but it'll start you on a crippling hobby to instrument your entire life.
Raspberry Pi home assistant zigbee USB zigbee water sensor.
you could stop here at notifications.
or
Descend into madness, put a small ac submersible pump into your dehumidifier tray with a smart outlet. When the sensor trips full, have it run the submersible pump for x minutes.
Jokes on you I have like 5 raspberry pi’s that aren’t doing anything labeled future projects.