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

// Pin definitions for SPI
#define OLED_MOSI   23    // Data pin (MOSI)
#define OLED_CLK    18    // Clock pin (SCK)
#define OLED_DC     16    // Data/Command pin
#define OLED_CS     5     // Chip select pin
#define OLED_RESET  17    // Reset pin

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

// Initialize display with SPI
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT,
  OLED_MOSI, OLED_CLK, OLED_DC, OLED_RESET, OLED_CS);

void setup() {
  Serial.begin(115200);

  // Initialize with the SPI interface
  if(!display.begin(SSD1306_SWITCHCAPVCC)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }

  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(0,25);
  display.println(F("Hello"));
  display.println(F("World!"));
  display.display();
}

void loop() {
  // Empty loop
}