Skog Reboot

Product relationship

Skog Reboot is a keyboard product with two PCB versions, rev A and rev B, both supporting legacy BLE firmware (Bluefruit) and AVR DuoChord wireless backends.

Quick identification

• rev A: MCU AT90USB646.
• rev B: MCU AT90USB1286.
• Both have an encoder, RGB Matrix, and light-strip/logo zones.
• Wireless backend: Bluefruit or DuoChord.
• Flashing: .hex + qmk-dfu.

Do-not-mix warning

• Skog Reboot rev A and rev B differ in MCU, RGB driver, and firmware; do not mix.
• Bluefruit and DuoChord firmware on the same revision are not interchangeable.
• Migrating from Bluefruit to DuoChord requires a fixed sequence, see first migration.

Spec summary

Item	rev A	rev B
MCU	AT90USB646	AT90USB1286
Connectivity	USB + BLE	USB + BLE
Bootloader	qmk-dfu	qmk-dfu
Firmware format	.hex	.hex
Lighting	RGB Matrix + strip/logo	RGB Matrix + strip/logo (different driver)
Encoder	Yes	Yes
Wireless backend	Bluefruit / DuoChord	Bluefruit / DuoChord

Recommended firmware download

Firmware, VIA JSON definitions, and SHA-256 checksums are available in the Download Center (see Firmware Downloads). DuoChord targets also need a matching nRF OTA package, shipped as part of the first-migration kit.

First use / migration prerequisites

1. Confirm whether the PCB silkscreen says Skog Reboot rev A or rev B.
2. Legacy BLE firmware (Bluefruit): download the matching legacy BLE firmware for the rev, flash it, then pair following Legacy BLE firmware.
3. DuoChord: if the module currently runs Bluefruit, flash the AVR DuoChord firmware first, then hold both Shift keys and press F twice to enter DfuTarg, perform OTA, and re-pair. See Legacy BLE firmware → DuoChord first migration.
4. Flashing methods: see Wired Flashing (DFU / TinyUF2).

Common features

• Legacy BLE firmware operations: see Legacy BLE firmware.
• DuoChord operations: see AVR DuoChord.
• PCB identification: see Identify Your Keyboard & PCB.

Default keymap

The default keymap provides a standard layout with encoder and lighting keys. Wireless function keys (BLE1–BLE5, PAIR, CLR, etc.) follow the firmware you flash.

Model-specific features

• rev A / rev B versions (different MCU and RGB driver).
• Encoder, RGB Matrix, light-strip/logo zones.
• Bluefruit / DuoChord dual wireless backends.

Troubleshooting

• Cannot connect wirelessly: see Troubleshooting / Wireless.
• Lighting/encoder issues: confirm you flashed the matching rev firmware.
• Stuck keys (legacy BLE firmware): see the Legacy BLE firmware limits.
• Stuck mid-migration: see the first migration.

Version compatibility

• Hardware revisions: rev A / rev B (firmware not interchangeable).
• Config tools: VIA / Vial.
• Firmware: QMK / Vial builds for the Skog Reboot rev A/rev B targets; DuoChord targets also need the matching nRF OTA package.