For quite a while I had been longing to measure the waterlevel in my well.
The first attempt with a HC-SR04 failed due to distance (4 meter deep well) and problems of how to mount it in the well. Then I came across the JSN-SR04 sensor. It's all running on an esp2866 (I found it to have better wifi than the esp32). Several parts re-used from old projects. Added small solar panel to keep it all self contained. Data is sent to homeassistant (mqtt) and a bit of log/debug data to syslog.
Due to circumstances had it been lying on my desk quite a while, but finally, today I was able to install it!
I screwed a drainpipe cap to the lid of the well and mounted the sensor in another. A simple pipe connector in between works like a charm.
Awesome! Very cool. I am planning to do something similar with our 10kL tank, luckily not as deep and I can run PoE to it for full wired.
How do you use the well level data? It is obviously using groundwater and isn't a tank, but is there a sort of guideline to go by to know if you can use a lot or a little?
following this currently for my well might be interesting for you as well: https://nachbelichtet.com/en/measure-water-level-in-cisterns-and-tanks-with-homeassistant-esphome-and-tl-136-pressure-sensor-update-2
That is indeed very interesting. I didn't think of a pressure transducer, thanks for sharing! Waterproof ultrasonic sensors are cheap enough that I think I will put both in and see how they differ over time.
I register it as centemeters above the outlet. That will tell enough. Over time you'll get a feeling for it of how much you use i guess. (It's mainly to predict if my wife can refresh water for her ducks)