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

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET    -1 // Reset pin (-1 if sharing Arduino reset pin)
#define SDA_PIN 21
#define SCL_PIN 22

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

void setup() {
    Wire.begin(SDA_PIN, SCL_PIN); // Initialize I2C
        Serial.begin(115200);

            if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // I2C address: 0x3C
                    Serial.println("OLED initialization failed!");
                            while (1);
                                }

                                    display.clearDisplay();
                                        display.setTextSize(2);
                                            display.setTextColor(WHITE);
                                                display.setCursor(10, 20);
                                                    display.println("Hello, ESP32!");
                                                        display.display();
                                                        }

                                                        void loop() {
                                                            // No code needed, as we just display static text
                                                            }