#include <Ultrasonic.h>
Ultrasonic ultrasonic(4,14);
const int trigPin = 4;
const int echoPin = 14;
const int led = 2;


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(led, OUTPUT);
}

void loop() {
  int distance = ultrasonic.read();
  if (distance < 100) {
    digitalWrite(led, HIGH);
  }
  else{
    digitalWrite(led, LOW);
  }
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}