#include <Ultrasonic.h>

const int trigPin = A0; // Trigger pin of the ultrasonic sensor
const int echoPin = A1; // Echo pin of the ultrasonic sensor
const int relayPin = 9; // Relay pin connected to Arduino

Ultrasonic ultrasonic(trigPin, echoPin);

int targetWaterLevel = 10; // Adjust this value based on your setup (in centimeters)

void setup() {
  pinMode(relayPin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  int distance = ultrasonic.read(); // Read distance from sensor

  Serial.print("Distance: ");
  Serial.println(distance);

  if (distance <= targetWaterLevel) {
    digitalWrite(relayPin, LOW); // Close the tap
  } else {
    digitalWrite(relayPin, HIGH); // Open the tap
  }

  delay(1000); // Adjust delay as needed
}