Cant display image in esp with oled ssd1306

Other Hardware Displays
1

i cant display image in oled display ssd1306. i use image2cpp (javl.github.io) to convert in byte
but i cant still display image
here the code

#include <U8g2lib.h>
#include <Wire.h>
U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);

const unsigned char epd_bitmap_wifi [] PROGMEM = {
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x0f, 0xc7, 0xe3, 0x9f, 0xf9, 0xf0, 0x0f, 0xe3, 0xc7, 
	0xfe, 0x7f, 0xf8, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
};

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

void loop() {
u8g2.clearBuffer();
u8g2.setFontMode(1);
u8g2.setBitmapMode(1);
u8g2.drawXBM(46, 0, 16, 16, epd_bitmap_wifi);
u8g2.sendBuffer();
}

Screenshot 2024-03-24 155101
Screenshot 2024-03-24 1551011317×516 47.4 KB

*error on wokwi simulator dislay
can anyone help me

2

why did you post a screen grab of the wokwi... just save your project and share the link...

3

oh okay here's the link iot smartwatch - Wokwi ESP32, STM32, Arduino Simulator

4

can you share the bitmap you wanted to display? (the one you used with image2cpp)

5

wifi
here;s the image. i can't display this one

6

The image did not make it to the forum

ah actually it's there. it's just hidden by the dark theme

7

why i cant display the image? using imagecpp? i've error in the code?

8

well one issue is that your should use drawXBMP() as the bitmap is in progmem

image

but that will draw the bitmap in a weird way

➜ you need to modify the settings (black background, invert image colors and swap the bits in byte at the end)

image
image999×1398 115 KB

then your bitmap is

const unsigned char epd_bitmap_wifi [] PROGMEM = {
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0x0f, 0x1c, 0x38, 0x06, 0x60, 0xf0, 0x0f, 0x38, 0x1c, 
	0x80, 0x01, 0xe0, 0x07, 0x00, 0x00, 0x00, 0x00, 0x80, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

and you'll see
image

➜ the code

#include <U8g2lib.h>
#include <Wire.h>
U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);

const unsigned char epd_bitmap_wifi [] PROGMEM = {
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0x0f, 0x1c, 0x38, 0x06, 0x60, 0xf0, 0x0f, 0x38, 0x1c,
  0x80, 0x01, 0xe0, 0x07, 0x00, 0x00, 0x00, 0x00, 0x80, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

void setup() {
  u8g2.begin();
  u8g2.clearBuffer();
  u8g2.setFontMode(1);
  u8g2.setBitmapMode(1);
  u8g2.drawXBMP(46, 0, 16, 16, epd_bitmap_wifi); // drawXBMP because the bitmap is in PROGMEM
  u8g2.sendBuffer();
}

void loop() {}
9

oo i see, thanks to your help bro🤗

10

have fun