epd_draw_pixel not working

[nellydocs]

i tried using

void epd_draw_pixel(int x, int y, uint8_t color,
                    uint8_t *framebuffer);

from epd_driver.h

i tried it using epd_draw_pixel(500,200,0,framebuffer); and epd_draw_pixel(500,200,255,framebuffer);

both lines didnt work unf.

i am using the touchtest example code where i removed the center text. a snippet where i added the line ` epd_poweron(); epd_clear();

//Draw Box
epd_draw_rect(600, 450, 120, 60, 0, framebuffer);
cursor_x = 615;
cursor_y = 490;
writeln((GFXfont *)&FiraSans, "Prev", &cursor_x, &cursor_y, framebuffer);

epd_draw_rect(740, 450, 120, 60, 0, framebuffer);
cursor_x = 755;
cursor_y = 490;
writeln((GFXfont *)&FiraSans, "Next", &cursor_x, &cursor_y, framebuffer);

epd_draw_pixel(500,200,0,framebuffer);

Rect_t area = {
    .x = 160,
    .y = 420,
    .width = lilygo_width,
    .height =  lilygo_height
};
epd_copy_to_framebuffer(area, (uint8_t *) lilygo_data, framebuffer);

epd_draw_rect(10, 20, EPD_WIDTH - 20, EPD_HEIGHT / 2 + 80, 0, framebuffer);

epd_draw_grayscale_image(epd_full_screen(), framebuffer);
epd_poweroff();` 

what am i doing something wrong? could someone correct me please or prive a small snipped?

thanks

[martinberlin]

Looks ok are you sure is not drawing the pixel over another black element and you don’t see it? Try to draw 3 or 4 and do it on gray (255/2 or alike) I would also start with an empty screen to draw a pixel like this. I’m adding here on my wiki the things I research about this epaper: https://github.com/martinberlin/cale-idf/wiki/Model-parallel-ED047TC1.h#analysis-of-pixel-buffer

[martinberlin]

@nellydocs unless Lilygo has the will of updating this one day ( Check #33 )

I highly recommend to use this repository: https://github.com/vroland/epdiy

That has an upgraded version of the same base library used here. This also supports software rotation that is here not implemented and comes with examples. Works for ESP-IDF Framework and also Arduino-esp32.

Alternatively if you want to use Espressif IDF and C++ I have a component called Cale-idf that fully supports this epaper and it's touch component.