OLED Display 0.91 inch

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

// 0.91" OLED modules are commonly SSD1306 128x32 I2C displays.
// Constructor uses the exact wiring: SDA=A4, SCL=A5.
U8G2_SSD1306_128X32_UNIVISION_F_HW_I2C u8g2(U8G2_R0, U8X8_PIN_NONE);

void setup() {
  Wire.begin();
  u8g2.begin();

  u8g2.clearBuffer();
  u8g2.setFont(u8g2_font_ncenB08_tr);
  u8g2.drawStr(0, 12, "OLED 0.91\" Example");
  u8g2.setFont(u8g2_font_6x10_tr);
  u8g2.drawStr(0, 28, "Hello from Arduino Uno");
  u8g2.sendBuffer();
}

void loop() {
  // Static demo: the message stays on screen.
}