If you are designing your own intelligent “Graden Computer” with an optional digital plant moisture sensor/water pump controller that lights an ... Arduino Soil Moisture Sensor Module. July 23, 2015 .

Note that with the “DFR” sensor, we get a signal output very close to VCC (in digital mode) when the sensor is not submerged or is in clear water (and a bit lower than that in analog mode). Here’s one ...