#include <ESP32Servo.h>

const int servoPin = 13;
const int trigPin = 5;
const int echoPin = 18;

#define SOUND_SPEED 0.034
#define CM_TO_INCH 0.393701

Servo servo;

int volume = 0;
long duration;
float distanceCm;
float distanceInch;

void setup() {
  Serial.begin(115200);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  servo.attach(servoPin, 500,2400);
  servo.attach(13);
}

int Pos = 0;

void loop() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  duration = pulseIn(echoPin, HIGH);

  distanceCm = duration * SOUND_SPEED/2;

  distanceInch = distanceCm * CM_TO_INCH;

  Serial.print("Distance (cm): ");
  Serial.print(distanceCm);
  Serial.print("Distance (inch): ");
  Serial.print(distanceInch);

  delay(1000);
  
  
  servo.write(distanceCm);
  delay(500);
  servo.write(distanceCm);
  delay(500);
}