Sensors 4 pins

Soil Moisture Sensor

Soil moisture sensor module. Analog and digital output, 3.3V or 5V.

// connector diagram 4 pins

// loading diagram...

// Specifications

Supply Voltage

3.3V – 5V

Output

Analog + digital threshold

Analog Output

0V (wet) to VCC (dry)

Threshold

Adjustable via potentiometer

Package

Module with probe

// Pin Reference Table

Pin	Name	Function	Type
VCC	VCC	3.3V–5V power	PWR
GND	GND	Ground	GND
AOUT	AOUT	Analog output	ADC
DOUT	DOUT	Digital output, LOW = wet	I/O

A capacitive or resistive soil moisture sensor module with analog and digital outputs. Measures soil water content, widely used in automated plant watering systems. Analog output is higher in dry soil, lower in wet.