[BUG] Screen brightness going down somethimes when increasing value

[PilotOfGolf]

Did you test with a precompiled firmware?

Yes, and the problem still exists.

Bug Description

When changing the screen brightness, the screen brightness when increasing the value usually goes up, but it goes down at one point.

Bug Timeline

It has presisted since I have had the firmware (2-3 months)

Expected behavior

I expected the screen to increase the brightness as I increased the value.

Actual behavior

When I increased the value, the brightness usually increased. However at one point, the brightness decreased when increasing this value. This specifcally happens when going from 4 -> 5.

Steps to Reproduce

I was able to get this to reproduce when changing the brightness whilst printing, and whilst not printing. I put the steps to reproduce while not printing

1. Navigate to screen brightness setting
2. increase value steadily
3. Notice that going from 4 to 5 the screen gets dimmer (This is the issue).

Version of Professional Firmware

2.1.3

Printer model

Ender 3 S1

Electronics

F4 Board (stock board)

LCD/Controller

Stock E3S1 Screen

Other add-ons

None related

Bed Leveling

ABL Bilinear mesh

Your Slicer

Prusa Slicer

Host Software

SD Card (headless)

Additional information & file uploads

This video shows the issue. https://drive.google.com/file/d/1XuYBCbVtvJy80d7Nw-c6eB_T4JGRJYVM/view?usp=drive_link

[mriscoc]

Some displays units have that behaviour with the generic firmware version, there is not an unique Stock E3S1 Screen, you must to compare your screen with these 5 possible versions: https://github.com/mriscoc/Ender3V2S1/wiki/How-to-update-the-display
So, some displays need an custom firmware compiled for that units.

[mriscoc]

For TJC displays the brightness range is defined like:

  #ifdef TJC_DISPLAY
    #define LCD_BRIGHTNESS_MIN 6
    #define LCD_BRIGHTNESS_MAX 40
    #define LCD_BRIGHTNESS_DEFAULT 20
  #else 

[github-actions]

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