This project from maker MichaelH3777 makes good use of a Pi Zero W.
I needed a way to check the level of my underground water tank so that I can manage water usage.
A Raspberry Pi monitors the water level using a submersed 4-20ma sensor and sends MQTT messages over WIFI to Node-RED which is running on a Synology NAS, but it could be running on another Raspberry PI or other hardware.
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