Capacitive Soil Moisture sensor from https://github.com/Miceuz/soil-moisture-sensor-analog . Some parts changed because of local availability.
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README.md

soil-moisture-sensor-analog

3D render

Analog soil moisture sensor. Continuation of my Chirp project. The idea behind this version is to provide an analog output for the microcontroller and increase the resolution by detecting both peaks and dips of filtered waveform.