How to use the Soil Moisture Sensor with Arduino

INTRODUCTION

Soil moisture sensors measure the volumetric water content in the soil. The relation between the measured property and soil moisture can be calibrated and vary depending on environmental factors such as soil type, temperature, etc.

APPLICATIONS

The soil moisture sensor can be used in Agriculture – To find the fertility of soil, Construction – To estimate the quantity and quality of building materials and also planning and maintaining landscape irrigation.

WIRING DIAGRAM

GND – GND

VCC – 5V

A0 – Analog Pin A0

D0 – Digital Pin 5

CODE

 

int sensor_pin = A0; 
int output_value ;

void setup() {
  Serial.begin(9600);
  Serial.println("Reading From the Sensor ...");
  delay(2000);
  }

void loop() {

  output_value= analogRead(sensor_pin);
  output_value = map(output_value,550,0,0,100);
  Serial.print("Mositure : ");
  Serial.print(output_value);
  Serial.println("%");
  delay(1000);
  }

END RESULT

Open the serial terminal. Dip the nobs of the sensor in soil to find its moisture.

ADDITIONAL RESOURCES

https://create.arduino.cc/projecthub/electropeak/complete-guide-to-use-soil-moisture-sensor-w-examples-756b1f

https://www.instructables.com/id/Arduino-Soil-Moisture-Sensor/