Soil Hygrometer Detection Module Arduino

Features:

• Functionality: Detects soil moisture; outputs high level when soil is wet and low level when dry.
• Usage: Can be used to create an automatic watering system for garden plants, reducing the need for manual management.
• Adjustable Sensitivity: Features a blue digital potentiometer for sensitivity adjustment.
• Operating Voltage: 3.3V to 5V.
• Output Modes:
  • Digital output (simple)
  • Analog output (more accurate)
• Installation: Comes with fixed bolt holes for easy installation.
• PCB Size: Small size of 3cm x 1.6cm.
• Indicators:
  • Power indicator (red)
  • Digital output indicator (green)
• Chip: Utilizes LM393 comparator chip for stability.

Interface Specifications (4-wire)

1. VCC: 3.3V-5V external power.
2. GND: External ground.
3. DO: Digital output interface (0 and 1).
4. AO: Analog output interface.

Instructions

1. Sensitivity: Module is highly sensitive to soil moisture.
2. Threshold Detection:
   • DO port outputs high when moisture reaches the set threshold.
   • Outputs low when moisture exceeds the threshold.
3. Microcontroller Connection:
   • Digital output DO can connect directly to a microcontroller to detect moisture levels.
4. Alarm System:
   • Digital output DO can drive relay modules, buzzers, etc., to create moisture alarm systems.
5. Analog Output:
   • AO can connect to an AD converter for more accurate soil moisture readings.