const int trigPin = 5;
const int echoPin = 18;
void setup() {
  
  Serial.begin(115200);
  pinMode(trigPin,OUTPUT);
  pinMode(echoPin, INPUT);
  Serial.println("Hello, ESP32!");
}

void loop() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  long duration = pulseIn(echoPin,HIGH);
  long distance = duration * 0.034/2;

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

  delay(500);

  
}