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

U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/U8X8_PIN_NONE);

String vakk = "";

void setup() {
  Wire.begin();
  u8g2.begin();
  Serial.begin(9600);  // Initialize serial at 9600 baud
  while (!Serial);     // Wait for serial port to connect (optional)
}

void loop() {
  if (Serial.available()) {
    char incoming = Serial.read(); // Read incoming byte
    vakk=vakk+incoming;
    if (incoming == '\n') {
      // Draw text inside the page loop
      u8g2.firstPage();
      do {
        u8g2.clearBuffer();
        u8g2.setFontMode(1);
        u8g2.setBitmapMode(1);
        u8g2.setFont(u8g2_font_6x13_tr);
        u8g2.drawStr(3, 10, vakk.c_str());
      } while (u8g2.nextPage());
      vakk = "";
    }
  }
  delay(10);
}