#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define LED_PIN 23

Adafruit_SSD1306 display(SCREEN_WIDTH,SCREEN_HEIGHT,  &Wire, -1);

void setup () {
  pinMode(LED_PIN, OUTPUT);

  display.begin(SSD1306_PAGEADDR, 0x3C);
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0, 0);
  display.print("Hello, ESP321!");
  display.display();

  // Turn on the LED
  digitalWrite(LED_PIN, HIGH);
}

void loop() {
  //You can add more functionally here
}