Soil Moisture Sensor Soil Hygrometer Sensor for Arduino project Capacitive/Resistive TechMakers

Type A: Resistive

Features:

- This is a simple water sensor can be used to detect soil moisture when the soil moisture deficit module outputs a high level, and vice versa output low. Use this sensor produced an automatic plant waterer device, so that the plants in your garden without people to manage.
- Sensitivity adjustable the blue digital potentiometer adjustment (Figure)
- Operating voltage 3.3V-5V
- Module dual output mode, digital output, analog output more accurate.
- With fixed bolt hole for easy installation
- PCB size: 3cm * 1.6cm
- Power indicator (red) and digital switching output indicator (green)
- Comparator LM393 chip, stable

Interface Description (4-wire)

1. VCC: .3 V-5V
2. GND: GND
3. DO: digital output interface (0 and 1)
4. AO: Analog Output Interface

Instructions for use:

- Soil moisture module is most sensitive to the ambient humidity is generally used to detect the moisture content of the soil.
- Module to reach the threshold value is set in the soil moisture, DO port output high, when the the soil humidity exceeds a set threshold value, the module D0 output low;
- The digital output D0 can be connected directly with the microcontroller to detect high and low by the microcontroller to detect soil moisture;
- The digital outputs DO shop relay module can directly drive the buzzer module, which can form a soil moisture alarm equipment;
- Analog output AO and AD module connected through the AD converter, you can get more precise values of soil moisture

Type B: Capacitive

Description:

This soil moisture sensor measures soil mositure levels by capacitive sensing rather than resistive sensing like other sensors on the market. It is made of corrosion resistant material which gives it an excellent service life. Insert it in to the soil around your plants and impress your friends with real-time soil moisture data! This module includes an on-board voltage regulator which gives it an operating voltage range of 3.3 ~ 5.5V. It is perfect for low-voltage MCUs, both 3.3V and 5V. For compatibility with a Raspberry Pi it will need an ADC converter.

Specification:

- Operating Voltage: 3.3 - 5.5 VDC
- Operating Current: 5mA
- Output Voltage: 0 to 3 VDC
- Interface: PH2-3P
- Application: Gardening and Farming Moisture Detection Intelligent Agriculture
- Weight: 15g