Soil Moisture Sensor

The Soil Moisture Sensor was developed to detect variations in soil moisture, and when the soil is dry the sensor output is in a high state and when it is wet it is in a low state.

The limit between dry and wet can be adjusted using the potentiometer on the module, which will regulate the digital output D0. However, to have a better resolution it is possible to use the A0 analog output and connect to an AD converter, which is present in the Arduino, for example.

Specifications:

• Operation Voltage: 3.3-5V
• Adjustable sensitivity via potentiometer
• Digital & Analog Output
• Easy installation
• LED indicator for voltage (red)
• LED indicator for digital output (green)
• Comparator LM393
• PCB Dimensions: 3×1.5 cm
• Probe dimensions: 6×2 cm
• Cable Length: 21 cm