#define TRIG_PIN 14  
#define ECHO_PIN 12  

long lastStartTime = 0; // Variable to store the last start time

void setup() {
  Serial.begin(115200);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
}

void loop() {
  // Measure distance
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  long duration = pulseIn(ECHO_PIN, HIGH);
  long distance = (duration / 2) / 29.1;

  Serial.print("Distance : ");
  Serial.println(distance); // Print CPU time in milliseconds

  delay(1000); // Delay for 1 second
}