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Keyberon Build status

A rust crate to create a pure rust keyboard firmware.

It is exposed as a library giving you the different building blocks to create a featureful keyboard firmware. As the different functionality are interconected by the user of the crate, you can use only the parts you are interested in or easily insert your own code in between.

This crate is a no_std crate, running on stable rust. To use it on a given MCU, you need GPIO throw the embedded hal crate to read the key states, and the usb-device crate for USB communication.

Projects using this firmware

List of Repositories using Keyberon

The first project using this firmware is Keyberon grid, a handwired keyboard with a grid of keys. It is based on the blue pill, a cheap development board based on a STM32F103 MCU.


There is a port to Cannon Keys's Ortho60 keyboard kit (blue pill based).


Another handwired project using keyberon is keyberon-f4, a unsplitted ergo keyboard. It runs on a WeAct MiniF4 based on a STM32F401 MCU.


TssT16's 4x12 keyboard (blue pill based):


gilescope's 4x12 keyboard (keyberon grid, blue pill based):


covah901's keyboard (WeAct MiniF4 based):


KeySeeBee, a split ergo keyboard (STM32F072 based).


Arisu handwired using STM32F401.

Arisu handwired


The supported features are:

  • Layers when holding a key (aka the fn key). When holding multiple layer keys, the last pressed layer action sets the layer.
  • Transparent key, i.e. when on an alternative layer, the key will inherit the behavior of the default layer.
  • Change default layer dynamically.
  • Multiple keys sent on an single key press. It allows to have keys for complex shortcut, for example a key for copy and paste or alt tab, or for whatever you want.
  • Chording multiple keys together to act as a single key
  • hold tap: different action depending if the key is held or tapped. For example, you can have a key acting as layer change when held, and space when tapped.


Keyberon, what's that name?

To find new, findable and memorable project names, some persons in the rust community try to mix the name of a city with some keyword related to the project. For example, you have the Tokio project that derive its name from the Japanese capital Tokyo and IO for Input Output, the main subject of this project.

So, I have to find such a name. In the mechanical keyboard community, "keeb" is slang for keyboard. Thus, I searched for a city with the sound [kib], preferably in France as it is the country of origin of the project. I found Quiberon, and thus I named the project Keyberon.