Arduino – Soil Moisture Sensor

In this video i’ll be showing you how to get started with an Arduino compatible soil moisture sensor.

This particular sensor consists of a set of probes that are put into the soil and the control board.
The module can give both a digital and an analog output, the threshold for the digital output can be set with the onboard potentiometer.

To get started with this soil moisture sensor you’ll need the following items:

• Jumper wires
• Arduino board
• A suitable USB cable

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To begin I’ll be connecting the the probes to the control board and the control board to the Arduino using the jumper wires.

The board only requires 4 connections on your Arduino, 5 volts, ground, an analog input and a digital input, I’ll be using analog pin 0 and digital pin 7.

I’m then going to connect the Arduino to a computer with the Arduino IDE on it.
For this project I’ve created two sketches, one to read the analog input and another for the digital.

Downloads:

• Soil Moisture Digital
• Soil Moisture Analog

We can then upload the analog read sketch to the Arduino board and open the serial monitor to view the analog reading from the sensor board.