Altar I firmware releases and updates. Instructions to install firmware can be found here .

Release notes:
  • Remap keys in real-time with ZMK Studio: Altar I is now compatible with ZMK Studio, a tool for updating key bindings on the fly. To use ZMK Studio simply connect Altar I to your computer via USB or Bluetooth, and start editing your keymap via the web app or the native app for Windows, MacOS, or Linux
  • Added HOME and END key bindings: Access by pressing FN + LEFT ARROW (HOME) and FN + RIGHT ARROW (END)
  • Added ability to swap CMD/WIN and CTRL positions: Press CMD/WIN + CTRL + ENTER to swap positions. Press combo again to deactivate
  • Change to GLOBE key behaviour on macOS: Tapping GLOBE now opens the emoji viewer
  • Added new dial behaviour: Hold FN + turn dial for CMD + PLUS (clockwise) or CMD + MINUS (anti-clockwise). This is designed for zooming in and out in software such as Figma (macOS only)
  • Increased PAIR button hold time requirement from two to three seconds
  • Improved LED indicator behaviour
  • Updated to latest version of ZMK and Zephyr v4.1
  • Bluetooth compatibility, stability, power management, and reconnection logic improvements
  • Altar I firmware is now open source and publicly available
Release notes:
  • Pairing mode now activated by a long press on the PAIR button, avoiding accidental presses
  • Sensitivity of rotary encoder knob has been halved
  • PAIR button disabled when Altar I is set to USB mode
  • FN + DEL now sends FORWARD DELETE key, making various shortcuts possible
  • Apple GLOBE key now activated by tapping FN key
  • Pressing FN + ↑ (UP ARROW) and FN + ↓ (DOWN ARROW) now sends PAGE UP and PAGE DOWN key strokes
  • Improved Bluetooth compatibility with some Intel Bluetooth adapters and drivers
  • Improved overall Bluetooth stability
  • Updated to ZMK v3.5
Release notes:
  • Initial release
Installation
Prerequisite: Identify your Altar I pattern (either U.S. English or U.K. English). Pattern information can be found on the back of Altar I.

To install Altar I firmware:
  1. Download the latest firmware
  2. Ensure Altar I is turned on
  3. Connect Altar I directly to your computer via USB
  4. Press FN + CTRL + PAIR simultaneously to enter bootloader mode (Altar I will now appear as a storage device on your computer)
  5. Copy the firmware file to Altar I (an error may appear, however the file has been successfully transferred in this case)
  6. Once Altar I detects the new firmware being copied, it will automatically disconnect, reboot, install the new firmware, and reconnect itself.
Note: You may need to forget and re-pair Altar I for some changes to take effect.