Wholesale Soil Moisture Sensor Module with Corrosion-Resistant Probe

1. Power Connection Instructions

• [+]: Connect to the positive terminal of the power supply.
• [-]: Connect to the negative terminal of the power supply.
• ⚠️ Critical Warning: Do NOT reverse the polarity, as this may damage the chip permanently.
• After correct power connection, the [P] power indicator light will illuminate, confirming the module is operating normally.

2. Sensitivity Adjustment (Blue Potentiometer)

• Clockwise rotation: Increases the probe's detection sensitivity.
• Counterclockwise rotation: Decreases the probe's detection sensitivity.
• Example (Thermistor Sensor):
  • Default trigger threshold: 25°C (low-level output on [D0] when triggered).
  • After clockwise adjustment: Trigger activates at temperatures below 25°C.
  • After counterclockwise adjustment: Trigger activates at temperatures above 25°C.

3. Potentiometer Adjustment Limits

• When the potentiometer is rotated clockwise until the [S] output indicator light turns on: The adjustment range has exceeded the test threshold.
• When the potentiometer is rotated counterclockwise to its maximum limit: The adjustment range has also exceeded the threshold.
• ⚠️ Important: Do NOT adjust beyond the threshold in either direction, as this will cause the module to malfunction.
• Note: Potentiometer adjustment only affects the [D0] digital output and has no impact on the [A0] analog output.

4. Analog Output (A0)

• The [A0] port outputs an analog voltage signal, which can be directly detected by the ADC (Analog-to-Digital Converter) port of a microcontroller.

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At Muren Technology, we prioritize authenticity and traceability. Every batch undergoes strict quality inspection with full lot traceability and customs declaration support. Whether you require samples, small-batch trials, or large-volume orders, our professional team ensures accurate delivery and long-term stable cooperation.