#include <Arduino.h>
#include <Wire.h>
#include <U8g2lib.h>

// Hardware I2C SSD1306, 128x64
U8G2_SSD1306_128X64_NONAME_F_HW_I2C oled(U8G2_R0, U8X8_PIN_NONE);

void setup() {
  // Explicitly use the Wokwi STM32 Nucleo-C031C6 default I2C pins
  Wire.setSDA(14);   // D14
  Wire.setSCL(15);   // D15
  Wire.begin();

  oled.begin();
  oled.clearBuffer();

  oled.setFont(u8g2_font_ncenB08_tr);
  oled.drawStr(10, 20, "VECTOR OLED TEST");

  oled.setFont(u8g2_font_6x12_tr);
  oled.drawStr(10, 40, "Hello from Wokwi");
  oled.drawStr(22, 56, "NUCLEO-C031C6");

  oled.sendBuffer();
}

void loop() {
  // keep displayed text stable
}