The Earth Sensor unit is a Soil Moisture Sensor for measuring the moisture in soil and similar materials. The two large exposed pads function as probes for the sensor, together acting as a variable resistor. The more moisture in the soil means the better the conductivity between the two, and the sensor will result in a lower resistance, and a higher SIG out. You can read the moisture in soil by using the ADC. Inside this unit we've added extra potentiometers to change the measurement range. The electrode part of the unit is not anti-corrosive, or waterproof, it is for POC purpose only. Please do NOT put it in a humidity environment for a long time. Features * Adjustable threshold, including 10K adjustable resistor * Analog & Digital output * GROVE interface, support UIFlow and Arduino * Two Lego-compatible holes Package Contents * 1x Earth Sensor Unit * 1x GROVE Cable Specifications Resources Parameter Net weight 5g Gross weight 18g Product Size 64.4 x 24.1 x 8.1mm Product Size 67 x 53 x 12mm Resources * Documents https://elecena.pl/product/22723915/m5stack-earth-moisture-sensor-unit-analog-and-digital-output 2023-03-07 https://elecena.pl/product/22723915/m5stack-earth-moisture-sensor-unit-analog-and-digital-output 2023-12-27 https://elecena.pl/product/22723915/m5stack-earth-moisture-sensor-unit-analog-and-digital-output 2024-09-19 https://elecena.pl/product/22723915/m5stack-earth-moisture-sensor-unit-analog-and-digital-output 2024-11-29 https://elecena.pl/product/22723915/m5stack-earth-moisture-sensor-unit-analog-and-digital-output 2024-11-30 https://elecena.pl/product/22723915/m5stack-earth-moisture-sensor-unit-analog-and-digital-output 2025-04-29 https://elecena.pl/product/22723915/m5stack-earth-moisture-sensor-unit-analog-and-digital-output 2025-11-28 https://elecena.pl/product/22723915/m5stack-earth-moisture-sensor-unit-analog-and-digital-output 2025-11-29