Adafruit Simple Soil Moisture Sensor - For micro:bit, and more

Perfect for educational uses, the Adafruit Simple Soil Moisture Sensor is low cost and easy to use. It utilizes a straightforward resistive design with two prongs to measure soil conductivity.

The gold-plated prongs help reduce the risk of oxidation. If buildup occurs, simply clean with a dish-scrubber to maintain performance. This sensor is ideal for use with micro:bit or Arduino boards that have an analog input, but it won't work with a Raspberry Pi due to its lack of analog inputs.

Getting started is simple. With a micro:bit, use small alligator clips to connect the GND, 3V, and 0 (or 1 or 2) pads on the micro:bit to the corresponding pads on the sensor. Watch as the analog reading increases from under 100 for dry soil to around 1000 as the soil becomes wetter.

On an Arduino, connect 3V to the 3V output pin (or 5V if there's no 3V pin) and GND to ground, with the OUT connected to A0 or another analog input. AnalogRead() will show 600 for dry soil. No soldering required!

Please note: This package includes just the sensor, so you'll need alligator clips or a JST-SH cable for connectivity.