Example Code for Arduino-Multi-language Display

Hardware Preparation

• DFRduino UNO R3 (or similar) x 1
• 0.91" 128x32 OLED-A x 1
• M-M/F-M/F-F Jumper wires x 1 set

Software Preparation

• Arduino IDE
• Download and install the 0.91" 128x32 OLED-A u8g2 Library (About how to install the library?)
• Download and install the [0.91" 128x32 OLED-A DFRobot_GDL Library] (Not released yet)
• It is recommended to use Arduino 1.8.9 and above.

Wiring Diagram

Other Preparation Work

• The IIC address is 0x3C
• When welding, please try to keep the pin or line on the pad at arm's length from the mounting hole.
• The font takes up a lot of memory, so please use it with caution. Get your own Chinese encode for displaying only several fixed words.
• Display by drawXBM or use controller with larger memory
• Chinese Font：require a controller with larger memory than Leonardo
• Japanese Font：require a controller with larger memory than UNO
• Korean Font：Arduino INO files of the current version do not support for displaying Korean, but it can displayed properly on the Screen

Sample Code

/*!
 * @file Language.ino
 * @brief Display multiple languages in U8G2
 * @n A demo for displaying “hello world！” in Chinese, English, Korean, Japanese
 * @n U8G2 Font GitHub Address：https://github.com/olikraus/u8g2/wiki/fntlistall
 * 
 * @copyright  Copyright (c) 2010 DFRobot Co.Ltd (https://www.dfrobot.com)
 * @licence     The MIT License (MIT)
 * @author [Ajax]([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 <Wire.h>

/*
 *IIC Constructor
 *@param  rotation：	U8G2_R0 No rotation, horizontal, draw from left to right
		                U8G2_R1 Rotate 90 degrees clockwise, draw from top to  bottom
			            U8G2_R2 Rotate 180 degrees clockwise, draw from right to left 
			            U8G2_R3 Rotate 270 degrees clockwise, draw from bottom to top.
			            U8G2_MIRROR Display image content normally（v2.6.x and above)   Note: U8G2_MIRROR needs to be used with setFlipMode（）.
 *@param reset：U8x8_PIN_NONE Empty pin, reset pin will not be used.
 *
*/
U8G2_SSD1306_128X32_UNIVISION_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);  //M0/ESP32/ESP8266/mega2560/Uno/Leonardo

void setup(void) {
  u8g2.begin();    //init
  u8g2.enableUTF8Print();		// Enable UTF8 support for Arduino print（）function.
}

void loop(void) 
{
  /*
   *The font takes up a lot of memory, so please use it with caution. Get your own Chinese encode for displaying only several fixed words.
   *Display by drawXBM or use controller with larger memory
   *Chinese Font：require a controller with larger memory than Leonardo  
   *Japanese Font：require a controller with larger memory than UNO
   *Korean Font：Arduino INO files of the current version do not support for displaying Korean, but it can displayed properly on the Screen
  */
  u8g2.setFont(u8g2_font_unifont_t_chinese2);  //Set all fonts in “你好世界” to chinese2
  //u8g2.setFont(u8g2_font_b10_t_japanese1);  // Japanese 1 includes all fonts in “こんにちは世界” ：Lerning level 1-6 
  //u8g2.setFont(u8g2_font_unifont_t_korean1);  // Korean 1 includes all fonts in “안녕하세요세계”：Lerning level 1-2
  
  /*@brief Set font direction  of all strings setFontDirection(uint8_t dir)
   *@param dir=0，rotate 0 degree
				 dir=1，rotate 90 degrees
				 dir=2，rotate 180 degrees
				 dir=3，rotate 270 degrees
   *@param When completed font setting, re-set the cursor position to display normally. Refer to API description for more details.
  */
  u8g2.setFontDirection(0);  
  
  /*
   * firstPage Change the current page number position to 0 
   * Revise content in firstPage and nextPage, re-render everything every time
   * This method consumes less ram space than sendBuffer
  */
  
  u8g2.firstPage();
  do {
    u8g2.setCursor(/* x=*/0, /* y=*/15);    //Define the cursor of print function, any output of the print function will start at this position.
    u8g2.print("Hello World!");
    u8g2.setCursor(0, 30);
    u8g2.print("你好世界");		// Chinese "Hello World" 
    //u8g2.print("こんにちは世界");		// Japanese "Hello World" 
    //u8g2.print("안녕하세요 세계");   // Korean "Hello World" 
  } while ( u8g2.nextPage() );
  delay(1000);
}

Result

Additional Information

• u8g2 API Functions
• u8g2 Font Parameters