- My repo https://github.com/t18n/zmk-config-corne
- Failed workflow: #76, #77
I am trying to enable backlight on my Cherry v3 Corne but the build always break. Above is the code and my build. Can somebody help?
#Backlight enabled build failed
wraith rain
lament elk
Backlighting is for single colour LEDs, you cant use SK6812/WS2812s for it
wraith rain
I bought it as instructed here
https://github.com/foostan/crkbd/blob/main/corne-cherry/doc/v3/buildguide_en.md
lament elk
you probably ned to configure it as part of the underglow node
wraith rain
Oh no. Do you happen to know how to configure it or have an example? I am pretty new with firmware stuff 😦
stuck lodge
Oh no. Do you happen to know how to configure it or have an example? I am pretty...
Increasing the underglow chain length to 27 might be enough: https://github.com/zmkfirmware/zmk/pull/1895/files#diff-cbfa08fa13ebf5e1f3e9ffbe7ac696a072575071a36bf6ab139d7a152ab38811R166
wraith rain
@stuck lodge Where should I add it?
wraith rain
Btw, the documentation you linked is for underglow 😦
gritty cape
ZMK doesn't support per-key backlighting. The only lighting code that works with RGB LEDs is the underglow code, hence the suggestion to add your backlight LEDs to be part of underglow
stuck lodge
<@224340879069020170> Where should I add it?
The link I sent also mentions where to put it
wintry gate
a couple of follow-up questions now. did you flash the firmware to both sides? and no lights are lighting up? do you have photos of the soldered pcbs (especially around the lowest numbered leds on each side)?
wraith rain
OMG it works. I added this into my keymap file and it fixed it.
&led_strip {
chain-length = <27>; /* 21 backlight + 6 glowlight */
};
Part of the problem was my soldering, since the 2nd glowlight led was not soldered, which makes all the backlight not working. That fixed my problem.
By the way, is there a way to separate the configuration for the backlight and the glow light? If not, can I configure individual pin so that I have each led display the color I wanted?
wintry gate
awesome! unfortunately, you can't separate them in zmk yet. they will all have to be the same color.
wraith rain
Thank you. This is already amazing.
wraith rain
The back light drain the battery quite a lot. I've heard that even if I turn off the backlight, it still drain the battery. Is it true? Do I have to desolder them to not consume power?
wintry gate
no, you can configure it so that it cuts power to them when you hit a keybinding. unfortunately, this will also turn off your display.
and, yes, otherwise even if they are not illuminated they will drain your battery. you can get a sense of the impact playing around with the power profiler https://zmk.dev/power-profiler
wraith rain
What about reducing the led brightness to lowest? Does it consume less power?
Using the profiler, should I list all my LEDs under Underglow?
Btw, I don't understand Percentage Asleep How to know that percentage?
wintry gate
all leds in underglow (for a single half). turn off backlight. percentage asleep is based on how often you’re actually typing. it won’t make any difference as long as you leave it at the same value while you play with the led settings.