Soil Moisture

soil-moisture

int soil=0;
int rEye = 10; //define right eye as pin10 on the Arduino
int lEye = 11; //define left eye as pin11 on the Arduino

// the setup routine runs once when you press reset:
void setup() {
  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
  pinMode(rEye, OUTPUT); //set right eye for output
  pinMode(lEye, OUTPUT); //set left eye for output
}

// the loop routine runs over and over again forever:
void loop() {
  digitalWrite(rEye, LOW);
  digitalWrite(lEye, LOW);
  // read the input on analog pin 0:
  int sensorValue = analogRead(A0);
  sensorValue = constrain(sensorValue, 485, 1023);
  // print out the value you read:
  //Serial.println(sensorValue);

  //map the value to a percentage
  soil = map(sensorValue, 485, 1023, 100, 0);
  
  // print out the soil water percentage you calculated:

  if(soil<21){
    digitalWrite(rEye, HIGH);
    delay(1000);
    digitalWrite(rEye, LOW);
    delay(1000);
    digitalWrite(rEye, HIGH);
  }
  
  if(soil>20){
    digitalWrite(lEye, HIGH);
    digitalWrite(rEye, LOW);
  }
  Serial.print(soil);
  Serial.println("%");

  delay(1000);        // delay in between reads for stability
}