HALJIA Soil Hygrometer Detection Module Soil Moisture Water Sensor Automatic Watering System Compatible with Arduino Robot smart car

Operating voltage:3.3V~5V Dual output mode,analog output more accurate Panel PCB Dimension: 30mm * 16mm Soil Probe Dimension:60mm*30mm Interface Description (4-wire) VCC: 3.3v-5v GND: GND DO: Digital output interface (0 and 1) AO: Analog output interface Soil moisture module is most sensitive to the ambient humidity is generally used to detect the moisture content of the soil. A fixed bolt hole for easy installation Instructions for use With power indicator (red) and digital switching output indicator (green),Having LM393 comparator chip,stable Module to reach the threshold value is set in the soil moisture, DO port output high, when the the soil humidity exceeds a set threshold value, the module D0 output low; The digital output D0 can be connected directly with the microcontroller to detect high and low by the microcontroller to detect soil moisture; The digital outputs DO shop relay module can directly drive the buzzer module, which can form a soil moisture alarm equipment; Analog