The Soil Moisture Sensor Module is a reliable and practical solution for measuring soil moisture levels in automatic watering systems, smart agriculture projects, and DIY electronics. Designed with a waterproof and corrosion-resistant probe, this soil moisture test module ensures stable performance and extended lifespan even when continuously inserted into soil. Available from BDTronics, this module is widely used in Bangladesh for Arduino, ESP32, ESP8266, and other microcontroller-based projects.

This soil moisture sensor supports both digital (DO) and analog (AO) signal outputs, allowing flexible integration with different control systems. The onboard voltage comparator evaluates soil moisture levels and provides accurate threshold-based digital output, while the analog output delivers real-time moisture data. BDTronics supplies this soil moisture sensor module for hobbyists, students, farmers, and automation developers across Bangladesh.

Features:

• Waterproof soil probe with high corrosion resistance

• Long operational life when inserted into soil

• Digital output (DO) for threshold-based control

• Analog output (AO) for real-time moisture measurement

• Wide operating voltage range from 3.3V to 12V DC

• Low power consumption suitable for embedded systems

• Adjustable detection sensitivity via onboard potentiometer

• Power and signal indicator LEDs for easy status monitoring

• Compact PCB design for easy installation

• Ideal for smart irrigation and automation projects

How to Use the Soil Moisture Sensor Module

• Connect the positive (+) terminal to the power supply and negative (-) to ground

• Ensure correct polarity to avoid damaging the module

• Power indicator LED will turn on when connected properly

• Insert the probe into the soil at the desired depth

• Adjust the blue potentiometer to set moisture detection threshold

• Read digital output (DO) for ON/OFF control signals

• Read analog output (AO) using microcontroller ADC pin

• Use the output to control pumps, valves, or alarms

Product Instructions and Operating Notes

• Potentiometer adjustment only affects the digital output (DO)

• Analog output (AO) provides continuous voltage based on moisture level

• Avoid reversing power connections to prevent chip damage

• Do not exceed the adjustment threshold range during calibration

• Suitable for long-term soil insertion with corrosion-resistant probe

• Commonly used with control boards sourced from BDTronics

Applications:

• Automatic watering and irrigation systems

• Smart agriculture and farming projects

• Plant monitoring systems

• Home garden automation

• Greenhouse environment control

• Educational electronics projects

• DIY Arduino and ESP32 projects

• Soil condition monitoring systems

Specifications:

• Product Name: Soil Moisture Sensor Module

• Operating Voltage: 3.3V – 12V DC

• Working Current: < 20 mA

• Output Current: < 30 mA

• Output Type: Digital (DO), Analog (AO)

• Interface Pins: + / - / DO / AO

• Detection Type: Soil moisture level

• Principle: Voltage comparator with moisture probe

• Board Dimensions: 35.5 x 15 x 9.2 mm

• Probe Dimensions: 109 x 18.7 x 8 mm

• Cable Length: 117 cm

• Weight: 20 g

Package Contents:

• 1 x Soil Moisture Sensor Module

• 1 x Waterproof Soil Moisture Probe

• 1 x Pen Head Connector

BDTronics is a trusted electronics components seller in Bangladesh, supplying reliable soil moisture sensors for automation, agriculture, and embedded system projects. This soil moisture sensor module from BDTronics is suitable for long-term use in smart watering and soil monitoring applications.

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