Example Code for Arduino-Hello World

Sample Code

/*!
 * @file HelloWorld.ino
 * @brief A simple and classic "Hello World!"
 * @n U8G2 supports fonts of multiple sizes, and this demo is just one font size to choose for display.
 * @n U8G2 Font GitHub Link: https://github.com/olikraus/u8g2/wiki/fntlistall
 * 
 * @copyright  Copyright (c) 2010 DFRobot Co.Ltd (https://www.dfrobot.com)
 * @licence     The MIT License (MIT)
 * @author [Ivey]([email protected])
 * @version  V1.0
 * @date  2019-11-29
 * @get from https://www.dfrobot.com
 * @url https://github.com/DFRobot/U8g2_Arduino
*/
#include <Arduino.h>
#include <U8g2lib.h>

//#include <SPI.h>
#include <Wire.h>

/*
 * Display hardware IIC interface constructor
 *@param rotation：U8G2_R0 Not rotate, horizontally, draw direction from left to right
		   U8G2_R1 Rotate clockwise 90 degrees, drawing direction from top to bottom
		   U8G2_R2 Rotate 180 degrees clockwise, drawing in right-to-left directions
		   U8G2_R3 Rotate clockwise 270 degrees, drawing direction from bottom to top
		   U8G2_MIRROR Normal display of mirror content (v2.6.x version used above)
		   Note: U8G2_MIRROR need to be used with setFlipMode().
 *@param reset：U8x8_PIN_NONE Indicates that the pin is empty and no reset pin is used
 * Display hardware SPI interface constructor
 *@param  Just connect the CS pin (pins are optional)
 *@param  Just connect the DC pin (pins are optional)
 *
*/
U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(/* rotation=*/U8G2_R0, /* reset=*/ U8X8_PIN_NONE);    //  M0/ESP32/ESP8266/mega2560/Uno/Leonardo
//U8G2_SSD1306_128X64_NONAME_1_4W_HW_SPI u8g2(/* rotation=*/U8G2_R0, /* cs=*/ 10, /* dc=*/ 9);
// End of constructor list


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

void loop(void) {
  u8g2.clearBuffer();					// clear the internal memory
  u8g2.setFont(u8g2_font_t0_17b_tr  );	// choose a suitable font
  u8g2.drawStr(0,10,"Hello World!");	// write something to the internal memory
  u8g2.sendBuffer();					// transfer internal memory to the display
  delay(1000);  
}

Result