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==== Set up Keychron C3 Pro RGB Keyboard ====
This is a short howto on setting up a Keychron C3 Pro RGB in Linux. You'll need sudo rights, but that's about all.

**Unfortunately**, I needed to use a Windows machine to upgrade my firmware first, using the instructions at [[https://launcher.keychron.com/#/keymap|launcher.keychron.com]], but I believe current models are shipping with the newer firmware pre-installed (c3_pro_ansi_rgb_v1.0.1_2403081755). If not, you can download the .bin file {{ :c3_pro_ansi_rgb_v1.0.1_2403081755.bin.zip |here}}.
<code bash>
# First, you need to know what groups you're currently
# in, this example was run on a Rocky Linux 9.4 host.
groups
# steve wheel dialout

# What I'm interested in here is the wheel group, it's what
# gives me sudo on this machine, and I'd like anybody that has 
# sudo to be able to edit the keyboard layout with usevia.app

# Create an empty file if it doesn't already exist
sudo touch /etc/udev/rules.d/99-vial.rules

# Add the rules below to that file, note the group is wheel.
echo 'KERNEL=="hidraw*", SUBSYSTEM=="hidraw", ATTRS{idVendor}=="3434", ATTRS{idProduct}=="0350", MODE="0660", GROUP="wheel", TAG+="uaccess", TAG+="udev-acl"' \
 | sudo tee -a /etc/udev/rules.d/99-vial.rules > /dev/null

# Make the rules take effect
sudo udevadm control --reload-rules && sudo udevadm trigger
</code>
Download the .json.zip file {{ :c3_pro_ansi_rgb_v1.0.0_20240125.json.zip |from here}} or from the Keychron website, unzip it somewhere and keep track of the file c3_pro_ansi_rgb_v1.0.0_20240125.json as you'll need it soon.
  - Open up the web page at [[https://usevia.app/]]
  - Click on 'Settings' (The gear icon, top center)
  - Click on the 'Show Design Tab' slider to move it to the right
  - Click on the 'Design' tab (Paintbrush icon)
  - Click on 'Load Draft Definitions' button, a File Browser window should open
  - Navigate to wherever you extracted the c3_pro_ans....json file to, select it, and open it.
  - A new window should open listing your Keyboard for some reason, for me it shows up as 'Keychron Keychron C3 Pro', no idea why the name is there twice
  - Click on your keyboard name, then 'Connect' at the bottom of that window, you should be golden
Set up your keeb however you want, and don't forget the macroee goodness!