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- This is Soil Moisture Sensor Module (Pack of 25)
- This Soil moisture module has an operating 3.3V~5V.
- Dual output mode, analog output more accurate.
- The Soil moisture module has a fixed bolt hole for easy installation.
- With power indicator (red) and digital switching output indicator (green).
- Soil moisture module is most sensitive to the ambient, generally used to detect the moisture content of the soil. Having LM393 comparator chip, stable.
- The Soil moisture module's digital output D0 can be connected directly to the MCU, MCU to detect high and low, to detect soil moisture.
Soil Moisture Sensor Module
This is Soil Moisture Sensor Module or Soil Moisture Meter, Soil Humidity Sensor, Water Sensor, Soil Hygrometer for Ardunio. With this module, you can tell when your plants need watering by how moist the soil is in your pot, garden, or yard. The two probes on the sensor act as variable resistors. 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 love. Installing this sensor and its PCB will have you on your way to growing a green thumb!
The 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.
When there is more water, the soil will conduct more electricity which means that there will be less resistance. Therefore, the moisture level will be higher. Dry soil conducts electricity poorly, so when there will be less water, then the soil will conduct less electricity which means that there will be more resistance. Therefore, the moisture level will be lower.
Applications:
- DIY Agriculture Projects.
- DIY Plant Watering System.
Wiring Connection
Soil Moisture Sensor Interfacing With Arduino Uno
- VCC: Connect to 3.3V-5V
- GND: Connect To GND
- DO: Digital output interface(0 and 1)
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Package Includes:
- 25 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.