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Posted by JLO64 3 hours ago

Keychron announces first open-source firmware for gaming mice(www.digitalfoundry.net)
171 points | 80 comments
jchw 3 hours ago|
A bit ago I accidentally bought a Keychron keyboard that didn't have QMK support, but then found that someone had ported it anyway, and I was able to flash it and fix some problems I had (the main one being that it seems like the default firmware only scans a single row of keys while asleep, possibly to save energy, but I want any keypress to wake the computer.) Maybe it's not perfect, but the community around open source keyboard firmware is great, it's a good example of how open source is beneficial for end users, especially power users.

And, in an era where vendor software and firmware for all kinds of devices is constantly having vulnerabilities, it is possible the liability of doing custom shit will eventually outweigh whatever benefits hardware companies seem to think it has, versus just having industry standards and free software instead. But, maybe that is wishful thinking.

My only complaint with Keychron is that of 5 or so keyboards I've owned from them I wound up having to resolder 3 different hotswap sockets on 2 different keyboards right out of the box. That is... Not a fantastic failure rate. OTOH, they are otherwise an unambiguously great value, with materials and build quality that feels pretty impressive for the cost, QC issues notwithstanding.

danudey 9 minutes ago||
My only complaint is that the backlight behavior has like a dozen different settings, none of which are "off". There's "on", "flicker", "blink when you hit the key", "ripple out when you hit the key", "move in waves regardless of input", etc., but there's no "don't be light" option.
martinjc 2 hours ago|||
I bought a K4 Nordic version, only to learn none of their software supports it. So i can't reconfigure the firmware.

The keyboard has swapped Super/Alt (Windows/Alt) on the windows layout which is so annoying. I hate spending money on hardware so i'm living with it, but i curse the engineer that burned the prom every day.

benoau 2 hours ago|||
That sucks, the main reason I like KeyChron is the little switch on the side of mine that toggles between Mac and Windows! I wouldn't buy another keyboard without this feature TBH.
martinjc 2 hours ago|||
Yeah on the mac it works fine. The keyboard just shipped with the Left Alt and Left Windows key in the correct positions, but they are mapped opposite in the firmware. Imagine how maddening it was in the beginning.
mananaysiempre 1 hour ago|||
GP’s point is that many keyboards these days come with a Mac/Windows switch, and one of the things that switch does is swap the keycodes sent by the Alt and Win keys—the “Mac” behaviour is exactly what you’re describing. (The other thing it does is toggle FnLock for the F-keys.) So if I had a problem like yours with my keyboard I’d think that the Mac/Win switch were in the wrong position. If I’m reading page 9 of the manual[1] right, on the K4 the switch in question is right next to the USB-C port.

[1] https://www.keychron.com/pages/k4-keyboard-user-manual

benoau 1 hour ago||||
Are you sure you don't have a tiny switch on the side? The manual indicates it should have one -

https://www.keychron.com/pages/k4-user-manual

martinjc 1 hour ago||
I do, but when on the windows mode the keys mentioned are in the wrong positions.

--

Edit and if i switch to the macOS mode. The right alt-gr key is not mapped correctly.

Barbing 1 hour ago||
On macOS:

I use my Keychron C3 in Windows mode because the macOS mode ain't right with the bottom left corner keys.

Maybe placement of Control/Option/Command aren't similar enough to the MacBook Pro keyboard for me.

Been meaning to figure this out and fix it... swapping physical keycaps or remapping in software or replacing the keyboard...

martinjc 1 hour ago||
Waiting for it to die and will not buy another of theirs. Piece of shit.
theodric 1 hour ago|||
Just remap it! If you're on Windows, SharpKeys will do that for you. https://github.com/randyrants/sharpkeys
martinjc 1 hour ago||
I have autohotkey for remapping. The issue is when i boot into a rpi with a new build, i don't want to pollute it with custom xbind mappings.
ThrowawayR2 1 hour ago|||
> "the little switch on the side of mine that toggles between Mac and Windows"

The physical slide switch on the Keychrons is a net negative for power users who use a KVM between Windows/Mac/Linux because it would wear out quickly and isn't replaceable. It's more sensible to have switching between layouts by keypress combination.

bigfishrunning 13 minutes ago|||
At least on the keychrons i've got, you can absolutely configure layout changes via key combination, and that slide switch is just an input like every button is an input.

I've got 2 that both run QMK firmware, so maybe the non-QMK ones can't do that, but at least some can.

svelle 35 minutes ago|||
Have been using one of their keyboards for two years switching between windows and macos and that key was not the one that wore out first. Plus on most keyboards you could configure the layout switch with qmk anyways.
BrandoElFollito 1 hour ago|||
Why not reconfiguring it with something like AutoHotkey at the OS level ?
spike021 1 hour ago||
my issue with the one i have (k2, iirc) is that if i use it wirelessly and the battery dies, it becomes a brick until its been fully recharged. it won't even work as a wired keyboard until then. so ever since then i only use it wired.
MayeulC 45 minutes ago||
Hmm, I have a mouse and trackballs from ploopy, they run QMK, so why was a new project needed? What is the added value?

To me, the missing feature in the QMK ecosystem is a devices too device communication channel. For now there is only caps lock & others: it would be nice to activate a mouse layer (for instance: increase DPI) to a keyboard key.

It is probably solvable if a heavyweight was to push for new HID descriptors or something similar.

fn-mote 1 hour ago||
Announces != releases.

They claim 2027 Q1 will be the release date.

Links below purporting to be “the repository” lead to a repo with no source code.

Sorry, I’m cynical. An announcement 6-9 months ahead of release? Why? Right now it’s vaporware.

ssl-3 35 minutes ago||
I'm cynical, too, and I have good reason to be.

I recently bought a Keychron TKL keyboard that uses Hall effect switches. It is, in my opinion, a lovely board to type on and so far I like it quite a lot. (Hopefully, this board with its socketed HE switches will serve longer than the previous board that had soldered Cherry MX Blues.)

It was advertised as being open-source and supporting QMK. Not at some time in the mysterious future, but right then. (And that's still true right now -- the web page is unchanged.)

But it does not have source available. The link for source code on the website lands at a Github page for a completely-unrelated keyboard, and I can't do anything at all with it using QMK. Extensive digging to find the source has resulted in zero positive results.

In the case of this Keychron keyboard, the promise of source code consists of resolute lies more than it does vaporware: The source is stated to openly exist, but it does not exist.

A question about this situation to their support email resulted in assignment of a ticket number, followed by silence.

So yeah, anyway: The cynicism is valid.

bluGill 1 hour ago|||
Keychron is a real company with a good history so it isn't unreasonable to expect it and thus you shouldn't be too cynical. However don't confuse that with don't be cynical at all - many companies with a good history have canceled projects, and this is still vaporware.
phoghed 1 hour ago||
If they plan on developing it in the open and taking early contribution / feedback could be a valid (and good) reason.
tmvphil 9 minutes ago||
Cool, I like Keychron products, but can people really not even write a single tweet without using AI to speak for them now?
jerlam 3 hours ago||
This would be more exciting if Keychron had mice of more interesting / experimental form factors and functionality. Just like their keyboards, their mice are mostly differentiated by obscure technical features (polling rates!).

I'm a bit worried that a decent, modern replacement for the extremely obsolete multi-button mouse I have now (Logitech G602) will never be available.

luqtas 1 hour ago||
i'm using this mouse for over 2 years now: https://happort.org/mouse

it uses this board: https://github.com/jfedor2/rp2040-pmw3360 and i can dig into my .stl files for the mouse if you want... made it on Blender and https://ryanis.cool/cosmos/beta - it's not the most lightweight thing in the world (would say around 100 grams) but it slides nicely and maybe by cycling/exercising often i don't think this one would give me RSI at any point in time... it's angle based on the most muscle neutral position the human arm anatomy has, between 20° - 30° [0] https://www.jospt.org/doi/pdf/10.2519/jospt.2004.34.10.638

100percentjake 2 hours ago|||
I miss my G602 so much. Replaced it with a G604 and then replaced that one with another G604 and then a third G604 before realizing that Logi's build quality has seemingly dived off a cliff for the premium they charge for their product and swapped to the 50% as expensive Keychron mice and keyboards and have been satisfactorily living with the decrease in available buttons (though quite an adjustment was needed). Onset of carpal tunnel has seen me switch to a vertical mouse anyways, so a change was inevitable.
minimaxir 1 hour ago|||
My G602 died due to Logitech's infamous double-click issue. :(

I've been fine with the G502 X Lightspeed (which should avoid said double-click issue due to optical switches) and some more efficient button use to compensate for the fewer side buttons.

ErroneousBosh 1 hour ago||
> Logitech's infamous double-click issue. :(

Isn't that just the tact switch failing? Two minute job to replace...

drdexebtjl 1 hour ago|||
Not on this mouse.

I looked it up (because I had already replaced switches on previous mice) and the fix required carefully removing a rubber cover that is glued in place and tears if you look at it wrong. It also requires removing the skates at the base, which means buying new ones. Even if you do that, the switch is very hard to access. Easily a 60+ minutes job.

I bought the switch thinking it was a 2 minute job and it’s still sitting on a closet for when I have the patience to do it.

minimaxir 1 hour ago|||
I do not casually have spare tactile switches, nor the hardware skills to replace.
realityfactchex 1 hour ago||
> a decent, modern replacement for...G602

What's wrong with the G502? I like the wired G502 pretty well. Ideally I'd tweak the shape to be a little more like the M500s shape, but I'm happy enough with it overall.

pdpi 1 hour ago||
I had a G502 that lasted years, but the last two I bought lasted me 6 months each (the wheel got completely gummed up somehow). I acknowledge that cat hair and sweaty hands are a bad combination for a mouse wheel, but that's insanely poor durability, and they're annoying enough to disassemble that they're effectively not cleanable.
DemiGuru 3 hours ago||
For those that are interested: - https://github.com/Keychron/zgm - https://zgm.gg/
exidex 3 hours ago|
Um, did they announce opensource firmware without providing the source?
DemiGuru 2 hours ago|||
Based on what I understand, pull requests are coming. In the meantime they provide directions for people that want to contribute here -> https://github.com/Keychron/zgm/blob/main/CONTRIBUTING.md
jerlam 21 minutes ago|||
That file appears to be either copied from a completely unrelated repo or vibe-coded.

> This repository is a lightweight analysis and report-generation workspace.

And "please contribute to our blank open-source project" can be taken with a grain of salt.

martinjc 2 hours ago|||
Where are the PRs coming in? I see a repo without source code.
robrtsql 3 hours ago|||
Yep!

> This repository is currently in its early setup phase.

> At the moment, the repository mainly contains project scaffolding, policy files, and the initial project direction. Firmware sources, board support, build instructions, and flashing guidance are still being prepared.

> That means zgm is early, but it is intentionally early in public. The goal is not to wait until everything is finished before opening the door. The goal is to make the long-term direction visible and let the project grow into a useful open firmware platform in the open.

fwip 30 minutes ago||
> That means zgm is early, but it is intentionally early in public.

"Intentionally early" is one of those phrases that means they vibed this README out in an hour with AI, and now hope that they can create firmware for it in the next 6 months.

nijave 3 hours ago||
Hopefully better than their QMK fork. They force push over their branch in their fork each new release effectively erasing history of the last version...

Of course there's no change log anywhere either...

seba_dos1 3 hours ago||
> effectively erasing history of the last version

Does that mean they remove any release tags as well?

warmwaffles 3 hours ago||
I don't blame them though. QMK is a mess of a monolithic repository.
Graziano_M 1 hour ago||
QMK should be thrown away. ZMK is much, much cleaner.
abhinavk 54 minutes ago||
Yep. I am waiting for half-duplex UART splitkb support to come so that I can move everything over.
m463 1 hour ago||
I bought a Q6 wired keyboard. Most solid keyboard I've ever owned.

Only problem is the backlight didn't actually light up the keys.

It wasn't fixable. first, the keys that came with the keyboard were opaque. And after the arduous task of replacing the keys with shine-through keycaps -- all the LEDs were positioned below the keystem instead of above, so the lettering wasn't illuminated.

I would have loved to use that keyboard. Switched to steelseries apex pro.

OsrsNeedsf2P 1 hour ago||
I really wanted to like Keychron, but after spending 200$ on one of their high end keyboards, certain keys weren't detecting presses less than a month later. I couldn't end up fixing it so I tossed it out. Felt like a waste
zamadatix 38 minutes ago||
Same. I ended up resoldering nearly all of the contact points (i.e. not the hot swap contact points but where those connect to the main board) because I liked the keyboard and firmware so much but it was such a stupid problem (way too little solder from the factory) for such an otherwise good and high end keyboard.
abhinavk 57 minutes ago||
I am deep into custom keyboards but I only buy ones with hot swappable switches. Some keys like AWSDEHJKL etc are bound to fail sooner than others.
ComputerPerson 44 minutes ago|||
The mechanical keyboard hobby takes patience; just look at firmware customization: testing litterally requires keystrokes.

I'm on a Mac keyboard bent for the very reason, actually,

Mouse firmware sounds very cool, though. If you could access a layer by holding down a central button, that could open up neat possibilities.

fwip 28 minutes ago|||
And all of us have owned multiple keyboards that have lasted for years of daily heavy use without a single key failing. Even the $30 membranes you could buy at $local_retailer didn't fail in a month.
theGeatZhopa 2 hours ago|
Hmm that opens up a way for cheating in games - have a Screengraber and image processing running directly communicate with mouse and let it calculate the distance to region of interest internally and then give out delta position. For the system, it looks like the mouse has been moved very fast and far
orbital-decay 1 hour ago||
There's a ton of low-latency proxy hardware meant for cheating that does exactly that, out of the box, for those too lazy to do it themselves on any devboard. It's not an excuse for closed source mouse firmware
kllrnohj 2 hours ago|||
it's hardly difficult to do that already. Like a Raspberry Pi Pico can be turned into a HID mouse rather easily: https://www.instructables.com/Raspberry-Pi-Pico-As-HID-Mouse...

and yes, hdmi/displayport capture -> ML object detection -> fake HID mouse to cheat is absolutely already a thing.

Graziano_M 1 hour ago||
It's already being done. The fanciest game hacks use a custom PCI card to DMA game memory, read it on another computer, where it can do wallhacks and such.

But also, the second computer can drive a virtual mouse and keyboard which is connected to the 'legit' PC to even aim/move/shoot for you.

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