How do I calibrate my STEMMA Soil Sensor to return volumetric water content (VWC)?

You can't. This soil sensor provides only a capacitive measurement. You could try to calibrate it against a known source, but this is NOT guaranteed to work.

This guide was first published on Nov 21, 2018. It was last updated on Nov 21, 2018. This page (FAQ) was last updated on Dec 14, 2019.