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Soil Moisture Sensor Module for Arduino, ESP32 & Automatic Plant Watering
Soil Moisture Sensor Module for Arduino, ESP32 & Automatic Plant Watering
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The Soil Moisture Sensor Module detects moisture levels in soil and helps determine whether a plant needs watering. Ideal for Arduino, ESP32, smart irrigation, automatic plant watering and DIY agriculture projects.
Technical Specifications
| Specification | Details |
|---|---|
| Sensor Type | Soil Moisture Sensor |
| Sensing Method | Resistive |
| Operating Voltage | Commonly 3.3V–5V |
| Output | Analog / Digital* |
| Sensitivity | Adjustable on common modules |
| Probe Type | Two-prong soil probe |
| Interface | VCC, GND, AO, DO* |
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Key Features
Key Features
Detects soil moisture
Simple probe-based design
Analog moisture output
Digital threshold output on common modules
Adjustable sensitivity
Easy Arduino integration
Compatible with ESP32
Suitable for automatic irrigation
Useful for educational projects
Applications
Applications
Automatic Plant Watering
Smart Irrigation
Home Gardening
Smart Agriculture
IoT Agriculture Projects
Arduino Projects
ESP32 Projects
Plant Monitoring
Water Pump Automation
Robotics
STEM Education
Engineering Projects
College Projects
Package Includes
Package Includes
1 × Soil Moisture Sensor Module
1 × Soil Moisture Probe
Compatibility
Compatibility
Frequently Asked Questions
Frequently Asked Questions
What does a soil moisture sensor measure?
It detects the relative moisture condition of soil.
Can I use it with Arduino Uno?
Yes. The analog output can be connected to an Arduino analog input.
Can I use it with ESP32?
Yes. Connect the output to a suitable ESP32 ADC input and ensure the voltage is within the ESP32's input limits.
Can it automatically water plants?
Yes. You can combine it with a microcontroller, relay module and water pump to build an automatic plant-watering system.
Does it directly control a water pump?
No. A suitable relay or switching circuit is required to control a pump safely.
Can I leave the sensor in soil permanently?
Basic resistive probes can corrode with prolonged exposure, especially when continuously powered. For permanent installations, a capacitive soil-moisture sensor is generally a better option.
Does it give an exact moisture percentage?
Not by itself. The output is relative and should be calibrated for your particular soil and application if you want meaningful moisture percentages.
