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- Operating voltage: 3.3V to 5V
- Dual output mode for more accurate readings
- Fixed bolt hole for easy installation
- Power indicator (red) and digital output indicator (green)
- Highly sensitive for detecting soil moisture
- Features LM393 comparator chip for stability
- Digital output (D0) connects directly to MCU for moisture detection
Soil Moisture Sensor Module
This is a Soil Moisture Sensor or Soil Humidity Sensor. With this module, you can tell when your plants need watering by how moist the soil is in your pot, garden, or yard.
Use it in a home automated watering system, hook it up to IoT, or just use it to find out when your plant needs a little care. Installing this sensor and its PCB will have you on your way to growing a green thumb!
This soil moisture sensor consists of two probes which are used to measure the volumetric content of water. The two probes allow the current to pass through the soil and then it gets the resistance value to measure the moisture value.
Applications:
- DIY Agriculture Projects.
- DIY Plant Watering System.
- Agriculture
- Horticulture
- Ecological Environmental Protection
- Water Resource Management
- Research and Education
Also check the Automatic Plant Watering System Kit includes components such as a relay module, mini water pump, plastic battery storage case holder, jumper wires, vinyl tubing, and a soil moisture detector module.
Features:
- Operating voltage: 3.3V to 5V
- Dual output mode for accuracy
- Easy installation with bolt-hole
- Power (red) and digital output (green) indicators
- LM393 comparator chip for stability
- Digital output (D0) for moisture detection
- Uses two probes to measure soil water content
Soil Moisture Sensor pinout
Build your Automatic Plant Watering System with Arduino:
To download the code Click Here
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Package Includes:
- 1 x Soil Moisture Sensor Kit
Specifications:
| Sensor Type | Soil Moisture Sensor |
| Operating Voltage (VDC | 3.3 ~ 5 |
| PCB Dimension | 3cm x 1.5cm |
| Soil Probe Dimension | 6cm x 3cm |
| Cable Length (CM) | 20 |
| Weight | 50 grams |
1. How does the soil moisture sensor work?
Soil Moisture sensor mainly uses capacitance to determine the soil's water content. This sensor works by inserting the module into the soil. The fork-shaped probe with two exposed conductors functions as a variable resistor, with resistance varying with soil moisture content.
2. How to connect a soil moisture sensor module with an Arduino?
It is very simple to use a Moisture sensor module with a Arduino. Connect the sensor module's Analog/Digital Output pin to the Microcontroller's Analog/Digital pin. Connect the VCC and GND pins to the Microcontroller's 5V and GND pins. Then, insert the probe into the soil.
3. How do you calibrate a soil moisture sensor?
A built-in potentiometer allows you to calibrate the digital output of the module (DO). You can set a threshold by turning the potentiometer's knob. The Status LED will light up and the module will output LOW when the moisture level exceeds the threshold value. When your plant is ready to be watered, insert the probe into the soil and turn the pot clockwise until the Status LED turns on, then counter-clockwise until the LED turns off to calibrate the sensor. That’s it your sensor is now calibrated and ready for use.
4. Where can we use soil moisture sensor?
Soil moisture sensors aid in good irrigation management, which results in better crops, lower input costs, and increased profitability. Irrigators can use soil moisture sensors to figure out what's going on in a crop's root zone.
5. What are the benefits of soil moisture sensor?
Soil moisture is a crucial factor in agriculture, landscaping, and gardening. The proper amount of soil moisture ensures the optimal growth and health of plants. Traditionally, farmers have relied on manual methods to measure soil moisture levels which can be time-consuming and inaccurate. This is where the benefits of using a soil moisture sensor become apparent for modern-day farmers. These sensors provide accurate real-time data on the water content in soils giving farmers precise information about irrigation needs, allowing them to make informed decisions that ultimately increase crop yield while conserving water usage. Additionally, these sensors save both time and resources by eliminating guesswork and reducing labor costs associated with traditional methods.
