#include "Wire.h"
#include "Adafruit_GFX.h"
#include "Adafruit_SSD1306.h"

Adafruit_SSD1306 oled(128, 64, &Wire, -1);

void setup() {
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(14, OUTPUT);
  pinMode(12, INPUT);
  oled.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  oled.display();
}

void loop() {
  digitalWrite(14, LOW);
  delay(1000);
  digitalWrite(14, HIGH);
  delay(1000);
  digitalWrite(14, LOW);
  
  int dur = pulseIn(12, HIGH);
  int dis = (0.034 * dur) / 2;
  Serial.println(dis);
  
  oled.clearDisplay();
  oled.setTextColor(SSD1306_WHITE);
  oled.setTextSize(1);
  oled.setCursor(0, 10);
  
  // Convert integer dis to a string
  String distanceString = String(dis);
  
  // Concatenate the string "Distance" with distanceString
  oled.println("Distance: " + distanceString + " cm");
  oled.display();
  delay(10);
}