Ergohaven RMK Firmware v0.1.8-rc.1

K:04 host BLE power-saving test

This prerelease contains standalone firmware for K:04, K:04 Mini, and K:04 Micro.

Changes

• After 2 minutes without input, the host BLE link switches to low-duty connection parameters without disconnecting.
• After the selected timeout (10 minutes to 5 hours, 30 minutes by default), the keyboard fully disconnects from the PC.
• A host suspend request disconnects the host BLE link immediately.
• A key, encoder, trackball, or touchpad event starts reconnection, and the first event is retained until the PC reconnects.
• Changing Host disconnect timeout in Bluetooth settings takes effect immediately.

What to test

• Overnight battery drain of the central and peripheral halves while the PC is on and while it is asleep.
• Reconnection delay and first-input delivery after the full timeout.
• Wake behavior from keys, encoders, trackballs, and touchpads on Windows, macOS, and Linux.
• Several timeout values, including changing the value while connected.

Flash both halves with the matching left/right UF2 files from one archive. Qube firmware is not included in this prerelease.