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4.4 Measure Soil Moisture

In the planting industry, the crops themselves cannot directly obtain the inorganic elements in the soil, Water in the soil acts as a solvent for dissolving these inorganic elements.

Crops absorb soil moisture through the root system, obtain nutrients, and promote growth.

In the process of crop growth and development, the requirements for soil temperature are also different. Therefore, a soil moisture sensor is required.

Required Components

In this project, we need the following components.

It’s definitely convenient to buy a whole kit, here’s the link:

Name	ITEMS IN THIS KIT	LINK
3 in 1 Starter Kit	380+	3 in 1 Starter Kit

You can also buy them separately from the links below.

COMPONENT INTRODUCTION	PURCHASE LINK
Arduino Uno R4 Minima	-
Jumper Wires	BUY
Soil Moisture Module	BUY

Schematic

Wiring

Code

Note

• Open the 4.4.measure_soil_moisture.ino file under the path of 3in1-kit\learning_project\4.4.measure_soil_moisture.

• Or copy this code into Arduino IDE.

Once the code is successfully uploaded, the serial monitor will print out the soil moisture value.

By inserting the module into the soil and watering it, the value of the soil moisture sensor will become smaller.