int LED=2;
int trig=12;
int echo=14;

unsigned long previousMillis = 0;
const long interval = 1000;

bool status;
float distance;


void setup() {
  pinMode(LED, OUTPUT); // Use the built-in LED pin
  pinMode(trig,OUTPUT);
  pinMode(echo,INPUT);
    Serial.begin(9600);
}

void loop() {
  Serial.println("hello  ");

unsigned long currentMillis = millis();

  if (currentMillis - previousMillis >= interval) {
    // Save the last time you ran the function
    previousMillis = currentMillis;

    // Call your function here
    status=pumpStatus();
  
Serial.println("status : " + String(status));

  }
  
//----------arduino code
  digitalWrite(trig,LOW);
  delay(2);
  digitalWrite(trig,HIGH);
  delay(10);
  digitalWrite(trig,LOW);
  digitalWrite(LED, HIGH);  // turn the LED on
  //delay(1000);
// digitalWrite(LED, LOW);   // turn the LED off
 // delay(1000);

 long duration = pulseIn(echo, HIGH);
   distance = (duration * 0.0343) / 2;

  // Print the distance to the Serial Monitor
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");
  delay(2000);

  Serial.println("------------");
}

bool pumpStatus() {
  

bool pumpon;

if(distance>=300){
pumpon=true;

return true;

}
else if(pumpon==true & distance<50){
pumpon=false;
  return false;
}

}