Support Waveshare 7.5in XSRUPB 2025 eink display

[candrews]

Component name

epaper_spi

Link to component documentation on our website

https://esphome.io/components/display/epaper_spi/

Describe the enhancement

epaper_spi doesn't currently support the Waveshare 7.5in XSRUPB 2025 eink panel.

@mutilator submitted esphome/esphome#8635 a while back to add support for this panel to the waveshare_epaper component, and it worked great. I'm using it on multiple devices with great success. However, the PR now has conflicts and no longer works with the current version of esphome.

Could the work from the PR be reimplemented for the new epaper_spi component?

Use cases

Supporting the Waveshare 7.5in XSRUPB 2025 eink panel would be great because the display is pretty cheap (only about $20 all costs included delivered to the US). They look and really great.

Anything else?

Apparently this display is also known as DEPG0750RWF86BF30andFPC-8612` ; here's the datasheet: https://github.com/user-attachments/files/20256633/FPC-8612.pdf

For reference, someone figured out how to add support for this display to GxEPD2: ZinggJM/GxEPD2#127 (comment)

[github-actions[bot]]

🏷️ I've automatically added the component: epaper_spi label to help categorize this feature request.

[mutilator]

I'm working on an update for this to work with the epaper_spi component. It's close but there are a few issues and I need to generate the documentation for it as well. I'm hoping the implementation is generic enough for any UC8129 bwr display like the waveshare or these other brand models.

[candrews]

That's fantastic! I'm happy to test, including any work in progress. I have a new display and I'm eager to start using it. :)

[mutilator]

You can copy down the folder from here https://github.com/mutilator/esphome/tree/uc8179-bwr/esphome/components/epaper_spi

The template would look something like this.

# Define colors
color:
  - id: color_blk
    red: 0%
    green: 0%
    blue: 0%
    white: 0%
  - id: color_white
    red: 100%
    green: 100%
    blue: 100%
    white: 100%
  - id: color_red
    red: 100%
    green: 0%
    blue: 0%
    white: 0%
    
display:
  - platform: epaper_spi
    model: 7.5in-bv3-bwr-xsrupb
    dimensions:
      width: 800
      height: 480            
    id: eink_display
    cs_pin: 
      number: GPIO15
      ignore_strapping_warning: True
    dc_pin: GPIO27
    busy_pin:
      number: GPIO25
      inverted: True
    reset_pin: GPIO26
    lambda: |-
      it.fill(color_white);  // white background
      it.print(10, 10, id(font), color_blk, "Black text");
      it.print(10, 50, id(font), color_red, "Red text");

[mutilator]

draft pr for now

esphome/esphome#14885

[mutilator]

I found settings and updated it so the border no longer shows. @candrews