Title: ESP8266+0.96oled guide to get into the pit

Equipment List

esp8266 development board oled (0.96) DuPont Line

Equipment circuit diagram

Add library

u8g2 library file

Project 1 Hello World

/*

HelloWorld.ino

esp8266+oled project example

Forum: bbskali.cn

Blog: blog.bbskali.cn

*/

#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=*/D2, /* data=*/D1, /* reset=*/U8X8_PIN_NONE); //Here D1 D2 is the corresponding welding pin

void setup(void) {

u8g2.begin();

}

void loop(void) {

u8g2.clearBuffer(); //clear the internal memory

u8g2.setFont(u8g2_font_ncenB08_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);

}The effect is as follows

The code of

Item 2 Display Chinese characters

is as follows:

/*

esp8266+oled display

Show Chinese character items

Forum address: bbskali.cn

Blog: blog.bbskali.cn

*/

#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=*/D2, /* data=*/D1, /* reset=*/U8X8_PIN_NONE); //All Boards without Reset of the Display

void setup(void) {

u8g2.begin();

u8g2.enableUTF8Print(); //enable UTF8 support for the Arduino print() function

}

void loop(void) {

u8g2.setFont(u8g2_font_unifont_t_chinese2); //use chinese2 for all the glyphs of 'Hello world'

u8g2.setFontDirection(0);

u8g2.clearBuffer();

u8g2.setCursor(0, 15);

u8g2.print('kali forum');

u8g2.setCursor(0, 30);

u8g2.print('bbskali.cn'); //Chinese 'Hello World'

u8g2.setCursor(0, 45);

u8g2.print('kali Hacker Teaching');

u8g2.sendBuffer();

delay(1000);

}The effects are as follows:

The code of

Item 3 Display multiple lines of text

is as follows:

/*

*/

#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_1_SW_I2C u8g2(U8G2_R0, /* clock=*/D2, /* data=*/D1, /* reset=*/U8X8_PIN_NONE); //All Boards without Reset of the Display

#define FONT u8g2_font_wqy14_t_gb2312b

//#define FONT u8g2_font_wqy16_t_chinese1

//#define FONT u8g2_font_wqy16_t_gb2312b

//The next two macros define the scroll speed of the short story

#define SCROLL_DELTA 2

#define SCROLL_DELAY 200

const char c_str[]=

'Shen Nong\n\n'

'KALI Forum Introduction\n'

'kali forum was created at 20\n'

'17, Webmaster Priess\n'

'This forum is based on kali'

'Full Research and Cybersecurity\n'

'For the convenience of friends' learning\n'

'We built this forum\n'

'Forum study is completely free\n'

'Our URL :\n'

'bbskali,cn\n'

'WeChat official account:\n'

'【kali Hacker Teaching】\n'

'Thank you for your attention. \n';

char buf[48]; //there are at most 8 chinese glyphs per line, max buf size is 8*3=24

uint8_t total_lines; //the total number of lines in the story

uint8_t i; //loop variable for the lines

uint8_t line_cnt; //number of lines to draw, usually equal to lines_per_draw

uint8_t start_line; //topmost visible line, derived from top_window_pos

uint8_t lines_per_draw; //how many lines to draw on the screen, derived from font and display height

uint16_t glyph_height; //height of the glyphs

uint16_t top_window_pos; //defines the display position in pixel within the text

uint16_t total_height; //total height in pixel, derived from font height and total_lines

u8g2_uint_t top_offset; //offset between the first visible line and the display

void setup(void) {

/* U8g2 Project: SSD1306 Test Board */

pinMode(D2, OUTPUT);

pinMode(D1, OUTPUT);

digitalWrite(10, 0);

digitalWrite(9, 0);

/* U8g2 Project: T6963 Test Board */

//pinMode(18, OUTPUT);

//digitalWrite(18, 1);

/* U8g2 Project: KS0108 Test Board */

//pinMode(16, OUTPUT);

//digitalWrite(16, 0);

/* U8g2 Project: LC7981 Test Board, connect RW to GND */

//pinMode(17, OUTPUT);

//digitalWrite(17, 0);

/* U8g2 Project: Pax Instruments Shield: Enable Backlight */

//pinMode(6, OUTPUT);

//digitalWrite(6, 0);

u8g2.begin();

/* select a font */

//u8g2.setFont(u8g2_font_wqy12_t_chinese1); //two unknown glyphs

//u8g2.setFont(u8g2_font_wqy12_t_chinese3); //two unknown glyphs

//u8g2.setFont(u8g2_font_wqy12_t_gb2312a); //';' is missing

//u8g2.setFont(u8g2_font_wqy12_t_gb2312b); //all glyphs available

u8g2.setFont(FONT);

/* calculate the length of the text in lines */

total_lines=u8x8_GetStringLineCnt(c_str);

/* get the height of the glyphs */

glyph_height=u8g2.getMaxCharHeight();

/* calculate the height of the text in pixel */

total_height=(uint16_t)total_lines * (uint16_t)glyph_height;

/* calculate how many lines must be drawn on the screen */

lines_per_draw=u8g2.getDisplayHeight()/glyph_height;

lines_per_draw +=2;

/* start at the top of the text */

top_window_pos=0;

}

void loop(void) {

start_line=top_window_pos/glyph_height;

top_offset=top_window_pos %glyph_height;

line_cnt=total_lines - start_line;

if ( line_cnt lines_per_draw )

line_cnt=lines_per_draw;

u8g2.firstPage();

do {

for( i=0; i line_cnt; i++ )

{

/* copy a line of the text to the local buffer */

u8x8_CopyStringLine(buf, i+start_line, c_str);

/* draw the content of the local buffer */

u8g2.drawUTF8(0, i*glyph_height-top_offset +glyph_height, buf);

}

} while ( u8g2.nextPage() );

delay(SCROLL_DELAY);

top_window_pos +=SCROLL_DELTA;

}