Soil Moisture Sensor Hygrometer Module – Arduino DIY Kit
Soil Moisture Sensor Hygrometer Module – Arduino DIY Kit
Soil Moisture Sensor Hygrometer Detection Module – Arduino DIY Kit
Take the guesswork out of plant care with this Soil Moisture Sensor Hygrometer Detection Module — the perfect component for hobbyists, students, and makers building Arduino-based automatic watering systems or smart garden projects. This compact, easy-to-use module detects the water content in soil and outputs a readable signal so your microcontroller always knows when it's time to water.
Why You'll Love This Module
- Accurate Moisture Detection: The dual-probe sensor measures soil conductivity to deliver reliable, real-time moisture readings for smarter automated irrigation.
- Arduino Compatible: Plug-and-play with Arduino Uno, Nano, Mega, and most other popular microcontroller boards — no complex wiring required.
- Analog & Digital Output: Both AO (analog) and DO (digital) output pins let you choose threshold-based switching or precise variable readings depending on your project needs.
- Onboard Indicator LEDs: Built-in power and signal LEDs give you instant visual feedback during testing and setup.
- DIY Kit Friendly: Ideal for STEM education, school projects, maker labs, and home automation enthusiasts looking to build their own smart watering system.
- Compact & Durable: Lightweight design makes it easy to integrate into any enclosure, breadboard setup, or permanent installation.
Technical Specifications
- Operating Voltage: 3.3V – 5V DC
- Output Type: Analog (AO) & Digital (DO)
- Onboard Comparator: LM393 for stable digital output
- Interface: 4-pin connector (VCC, GND, AO, DO)
- Compatible Platforms: Arduino, Raspberry Pi, ESP8266, ESP32, and more
- Brand: Hello STEM
- Country of Origin: Made in China
What's Included
- 1 × Soil Moisture Sensor Probe
- 1 × Comparator Control Module (LM393)
- Connecting wires
Perfect For
- Arduino automatic plant watering projects
- Smart garden & greenhouse automation
- STEM classroom experiments and DIY electronics kits
- Home IoT (Internet of Things) builds
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Frequently Asked Questions
Q: Is this soil moisture sensor module compatible with Arduino boards?
A: Yes! This soil moisture sensor hygrometer module is fully compatible with Arduino Uno, Nano, Mega, and most other Arduino-based microcontroller boards, as well as Raspberry Pi, ESP8266, and ESP32 platforms. It operates on 3.3V–5V, making it universally versatile for DIY electronics projects.
Q: What is the difference between the analog (AO) and digital (DO) outputs on this module?
A: The analog output (AO) provides a variable voltage signal that corresponds to the exact moisture level in the soil, allowing your Arduino sketch to read a range of values. The digital output (DO) uses the onboard LM393 comparator to output a simple HIGH/LOW signal based on a threshold you set with the onboard potentiometer — ideal for triggering automatic watering when the soil drops below a set dryness level.
Q: Can I use this module to build an automatic plant watering system?
A: Absolutely! This sensor module is one of the most popular components used in Arduino automatic watering systems. By connecting the module to your Arduino and pairing it with a relay and water pump, you can create a fully automated smart watering system that activates only when the soil moisture level drops below your desired threshold.
Q: How do I connect this soil moisture sensor to my Arduino?
A: Connecting is straightforward. The module has 4 pins: VCC (connect to 5V on Arduino), GND (connect to GND), AO (connect to an analog input pin such as A0), and DO (connect to a digital input pin). Power on the module, insert the probe into the soil, and start reading moisture values through your Arduino sketch immediately.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.