Rei's Corne Keyboard ZMK Config

Overview

This ZMK configuration is designed to maximise the use of home row keys for efficient typing and navigation. It employs a hybrid approach between pure home row mods and dedicated navigation layers.

• Hardware: Corne (6 columns, 42 keys) with nice!nano v2 controllers
• Features: Mouse emulation, home row mods, extensive combos, power management

Layout

Diagram automatically updates when keymap changes

Key Features

Home Row Mods (tweaked)

• Modifiers: ASEF and ;LIJ -> Shift/Control/Option/Command
• Navigation Layer: heavily used functions accessible from D/K, "pushing" Option to the top row (E/I)
• Timing: 250ms hold-tap timing with 100ms prior idle requirement to prevent false positives during normal typing

Navigation Layer

• Access: Hold D or K keys from the base layer
• Right Hand: Arrow keys, page up/down, home/end
• Left Hand: Mouse movement and scroll control
• Design: Both hands can activate layer for versatile usage patterns
• Mouse Control: Full mouse functionality available from left hand only

Precision Layer

• Access: Hold Z or , keys from base layer
• Function: Identical to navigation layer with 1/3 speed mouse movement
• Purpose: Fine-grained control for precise cursor positioning tasks

System Layer

• Access: Hold X or . keys from base layer
• Bluetooth: Profile switching and clearing (tap-dance sequences)
• Keyboard: Reset halves, soft-off mode (3-second hold)
• Media: Volume, brightness, and playback controls

Idle Layer

• Access: Combo through system layer (G + H)
• Purpose: Disables all keys for safe keyboard transport
• Exit: Same combo or power cycle keyboard

Combos

• Commonly used keys: tab, space, enter, backspace, delete, esc and parentheses
• Convenient access: all combos use index and middle fingers, and are at most one key away from resting position
• Timing: 100ms prior idle and short 25ms timeout to prevent typing interference

Power Management

• Idle timeout: 5 minutes before entering idle state
• Deep sleep: 10 minutes before entering deep sleep mode
• Wake: Any key press wakes keyboard from deep sleep
• Soft-off: Manual transport mode via 3-second system layer hold

Building & Flashing

Automatic Build (Recommended)

1. Fork this repository
2. Enable GitHub Actions in your fork
3. Edit config/corne.keymap or config/corne.conf
4. Commit and push changes
5. Download firmware .uf2 files from Actions artifacts

Flashing Firmware

1. Put keyboard half into bootloader mode (double-tap reset button)
2. Drag appropriate .uf2 file to the mounted drive
3. Repeat for second half
4. Keyboards will restart with new firmware