int sensorPin = A3;


void setup() {
  Serial.begin(9600); 
  delay(500); 
}

void loop() {
  
  int sensorValue;
  sensorValue = analogRead(sensorPin);
  sensorValue = map(sensorValue, 0, 1023, 0, 100);
  Serial.print("Soil moisture: ");
  Serial.print(sensorValue);
  Serial.println(" %");
  
  delay(500);
}