Overview

The Micro Journal Rev.3: Nadia ships with QMK firmware compiled with Vial support, turning the 48-key ortholinear keyboard into a fully programmable writing tool. The firmware runs on the RP2040 (Raspberry Pi Pico) and exposes all 48 keys plus two EC11 rotary encoders for real-time configuration via the Vial desktop application.

Features

Real-time keymap editing via the Vial GUI — no recompilation needed
Multiple keyboard layers for function keys, navigation, symbols, and macros
Dual rotary encoder support — configure scrolling, volume, undo/redo per layer
N-key rollover (NKRO) — full anti-ghosting with diode matrix
Mouse keys — use the keyboard as a mouse when needed
Bootmagic reset — hold top-left key while plugging in to enter bootloader

Hardware Configuration

The firmware is configured for a 12-column x 5-row matrix using GPIO pins GP2-GP18 for the key matrix, and GP19-GP22 for two rotary encoders. The diode direction is ROW2COL.

Flashing

The precompiled unkyulee_vial.uf2 firmware file is available in the repository. To flash:

Hold the BOOTSEL button on the Raspberry Pi Pico and plug in the USB cable
The Pico appears as a USB mass storage device
Drag and drop the .uf2 file onto the drive
The keyboard reboots automatically

For custom builds from source, use the QMK build system:

make unkyulee/ortho_48:default

Customization

Open the Vial desktop application (available at get.vial.today) to:

Remap any key on any layer
Configure tap-dance, combos, and one-shot modifiers
Set rotary encoder actions per layer
Create macros for frequently typed phrases

QMK/Vial Firmware for Micro Journal Rev.3 Nadia