I see the moisture reading slowly increasing over days especially in mostly dry soil. If I move the probe the reading resets itself so I assume this is polarization. I reduced the time the PWM is on and decreased the number of readings but still see the effect to a lesser extent at the default 2MHz. Any ideas how to further reduce this or depolarize it somehow? This graph attached shows moisture slowly increasing and then where I wiggle the probe around a little and moisture content drops
I see the moisture reading slowly increasing over days especially in mostly dry soil. If I move the probe the reading resets itself so I assume this is polarization. I reduced the time the PWM is on and decreased the number of readings but still see the effect to a lesser extent at the default 2MHz. Any ideas how to further reduce this or depolarize it somehow? This graph attached shows moisture slowly increasing and then where I wiggle the probe around a little and moisture content drops