I installed an $9 water flow meter into the path of my pool fill valve to watch for excessive filling or perhaps leaks (yep, I've had them - I should make a video about fixing that!). The water flow meter is attached to a Raspberry Pi (Rpi) ZeroW which counts the pulses from the meter and if the count goes over the limit, it emails me. I didn't attach the code but if you'd like it just message me and I can send it or put it into the description.
The flow meter's data line (yellow wire) is attached to the Rpi GPIO4 connection, power/VCC (red wire) is attached to 3.3V and of course ground (black wire) is attached to ground.
Here are some useful links:
Water flow meter: smile.amazon.com/gp/product/B...
Raspberry Pi GPIOs: www.raspberrypi.org/documenta...
Nice video on the Hall effect: • What is Hall Effect an...
Code can be found here: github.com/ravra/waterFlowMeter
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