ESPectro32_Ultrasonic_3

#include <Wire.h>
#include "SSD1306.h"

SSD1306 display(0x3c, 21, 22);

const int trigger = 2;
const int echo = 5;
int distance;
long duration;

void setup() {
  Serial.begin(9600);
  display.init();
  pinMode(trigger, OUTPUT);
  pinMode(echo, INPUT);
}

void loop() {
  display.clear();
  digitalWrite(trigger, LOW);
  delayMicroseconds(2);
  digitalWrite(trigger, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigger, LOW);

  duration = pulseIn(echo, HIGH);
  distance = duration / 58.8;
  display.drawString(0, 0, "Distance :  " + String(distance) + " cm");
  display.display();
  Serial.print("Distance : ");
  Serial.print(distance);
  Serial.println(" cm");
  delay(500);
}