Example Code for Arduino-Multi-language Display

Hardware Preparation

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

Software Preparation

• Arduino IDE
• Download and install the 0.91" 128x32 OLED-B u8g2 Library. (About how to install the library?)
• Download and install the [0.91" 128x32 OLED-B DFRobot_GDL Library]
  (Not released yet)

Wiring Diagram

Other Preparation Work

• The IIC address is 0x3C
• It is recommended to use Arduino 1.8.9 and above.
• 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

1.u8g2 API Functions

2.u8g2 Font Parameters

3.DFRobot_GDL API Functions