int sensorPin = A2;

void setup() {
  Serial.begin(9600); 
  delay(100); 
}

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