Corne keyboard with ZMK

The layers, shortcuts and combos of my split keyboard, written as code.

My own configuration

Drawing of a split keyboard with the keys of the main layer. — The main layer.

What it is

A 42-key Corne keyboard has no numpad or arrow keys, so everything lives in layers. This is my ZMK configuration: home-row modifiers, combos for everyday shortcuts and a gaming layer, with the map drawn out.

Firmware: the ZMK project.

What it does

Layers for numbers, symbols, movement, mouse, media, function and gaming.
Home-row modifier keys and two-key combos for undo, copy, paste, save and search.
A custom alt-tab and shortcuts for virtual desktops and the task manager.
Bluetooth with several devices and the map drawn automatically from the configuration.

What I did

I designed the layers of a 42-key keyboard, where every key has to count for several: numbers, symbols, movement, mouse, media, function and gaming.
I tuned the timing of home-row modifier keys, the combos and a custom alt-tab, commit by commit over weeks.
I wrote the whole configuration as code, versioned in Git, with the map drawn from it.
It’s the same drive that later led to my QMK keymap: making the keyboard adapt to me.