What is SpaceFN and why you should give it a try
The SpaceFN concept - setting up your space key as a layer switch when held - is probably one of the most useful tweaks in the keyboard hobby. Let me explain how it works. My SpaceFN article on kbd.news made some rounds recently - quite surprisingly given the age of this concept. This piece you're reading is a condensed version of the full post. If you're left with unanswered questions, you'll most likely find the info you're looking for in the original write-up. On my imaginary top list of the most useful keyboard features, tweaks and hacks, SpaceFN would deserve a podium finish for sure. But what makes it so special? In short: SpaceFN is easy to implement, easy to learn, costs nothing, can be used with any keyboard, and can improve your productivity instantly. I will list its benefits below, but can state right at this point that the SpaceFN concept, setting up your space key as a layer switch when held, is clearly one of the most useful tweaks in the keyboard hobby....
Apr 30, 2024
- 4 edges LEDs
- 21 tops LEDs
- 8 right LEDs
- 23 bottom LEDs
- 8 left LEDs
However in my tests using QMK (based of default_md keymap), I was able to map only 22 bottom LEDs (instead of 23) starting from right to left at id4/bit 6 until id4/bit 28. When I configure id4/bit 29 is activates the bottom left edge LED. What's id the correct underglow LED distribution? Is there any documentation with the correct LEDs mapping? It's also worth notting that the comments in https://github.com/Massdrop/qmk_firmware/blob/master/keyboards/massdrop/shift/keymaps/default_md/keymap.c#L288-L303 are unreliable. Don't appear to have been copied from another keyboard, as dropshift uses until id5, and underglow starts at id3 instead of id2.