countup.ino

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

#ifdef U8X8_HAVE_HW_SPI
#include <SPI.h>
#endif
#ifdef U8X8_HAVE_HW_I2C
#include <Wire.h>
#endif

U8G2_SSD1306_128X64_NONAME_F_SW_I2C u8g2(U8G2_R0, /* clock=*/ SCL, /* data=*/ SDA, /* reset=*/ U8X8_PIN_NONE);   // All Boards without Reset of the Display

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

int count = 0;
void loop(void) {
  count++;
  char buf[12];
  u8g2.clearBuffer();					// clear the internal memory
  u8g2.setFont(u8g2_font_ncenB14_tr);	// choose a suitable font
  u8g2.drawStr(0,40, itoa(count, buf, 10));	// write something to the internal memory
  u8g2.sendBuffer();					// transfer internal memory to the display
  delay(1000);
}