Published May 23, 2022 © CC0

YL69 Soil Moisture Sensor with Arduino | Sheekar Banerjee

This project is about interfacing YL69 soil moisture or hygrometer sensor which is generally used to detect the humidity of the soil.

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YL69 Soil Moisture Sensor with Arduino | Sheekar Banerjee

Things used in this project

Hardware components

YL-69 Soil Hygrometer Humidity & Soil Moisture Detection Sensor For Arduino

Arduino UNO

Software apps and online services

Arduino IDE

Story

This project is about the interfacing of YL69 soil hygrometer sensor module with Arduino for measuring humidity of soil. This module can be interfaced with other microcontrollers and processors as well. This sensor module has a wide range of potentiality in the field of Sensor based Smart Agriculture, Vertical farming and Internet of Things (IOT).

Circuit Planning:

Arduino UNO R3 YL69 Sensor

Pins--> Vin Vcc

Pins--> GND GND

Pins--> A0 A0

Code:

int rainPin = A0;
// you can adjust the threshold value
int thresholdValue = 1000;
void setup(){
    pinMode(rainPin, INPUT);
    Serial.begin(9600); //Sensor streaming 9600 bits of data per seconds
}
void loop() {
  // read the input on analog pin 0:
    int sensorValue = analogRead(rainPin);
    Serial.println("Soil-humidity sensor value: ");
    Serial.print(sensorValue);
    if(sensorValue < thresholdValue){
    Serial.println(" - Plant doesn't need watering now...");
    }
    else {
        Serial.println(" - Time to water your plant now...");
        
    }
    delay(1500);
}

Results:

SerialMonitor:

Serial Monitor Output from Arduino IDE while getting data from YL69 Soil Sensor

SerialPlotter:

Code

Program of YL69 Soil Sensor with Arduino UNO R3

int rainPin = A0;

// you can adjust the threshold value
int thresholdValue = 1000;

void setup(){
  pinMode(rainPin, INPUT);
  Serial.begin(9600); // Streaming 9600 bits of Sensor Data per Second
}

void loop() {
  // read the input on analog pin 0:
  int sensorValue = analogRead(rainPin);
  Serial.println("Soil-humidity sensor value: ");
  Serial.print(sensorValue);
  if(sensorValue < thresholdValue){
    Serial.println(" - Plant doesn't need watering now...");
    
  }
  else {
    Serial.println(" - Time to water your plant now...");
    
  }
  delay(3000);
}