#define VOLT_IN      A0
#define RED_LED      3
#define GREEN_LED    4

int ADCValue;
int percentWet;

void setup() {
  Serial.begin(9600);
  pinMode(VOLT_IN, INPUT);
  pinMode(RED_LED, OUTPUT);
  pinMode(GREEN_LED, OUTPUT);
}

void loop() {
  ADCValue = analogRead(VOLT_IN);
  //Serial.println(ADCValue);
  percentWet = map(ADCValue, 0, 1023, 100, 0);
  Serial.print("Percent = "); 
  Serial.println(percentWet);

  if(percentWet <= 30){
    Serial.println("Turn On Pump");
    digitalWrite(RED_LED, HIGH);
    digitalWrite(GREEN_LED, LOW);
  }else{
    Serial.println("Turn Off Pump");
    digitalWrite(RED_LED, LOW);
    digitalWrite(GREEN_LED, HIGH);
  }

  delay(500);  
}