int time1;
int dist;

void setup() {
Serial.begin(115200);
Serial.println("Hell, ESP32!");
pinMode(27, OUTPUT);
pinMode(26, INPUT);
}

void loop() {
  digitalWrite(27, LOW);
  delayMicroseconds(2);
  digitalWrite(27, HIGH);
  delayMicroseconds(10);
  digitalWrite(27, LOW);
  time1 = pulseIn(26, HIGH);
  //serial.printIn(time1);
  dist = (0.034 * time1)/2;
  Serial.println(dist);
  
}