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.
| 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 |