akko 5108S keyboard software
sharkfin identifies and reads the akko 5108S. Free and open source. Use it in a Chromium browser with nothing to install, or download the desktop app for Windows, macOS or Linux. Either way it runs entirely on your own machine: no account, and the browser version makes no network requests once the page has loaded.
2 revisions of the 5108S ship under this name. They are on different controllers, so they are genuinely different hardware and not just a firmware bump. sharkfin does not ask you which one you have: the board reports its own device ID when it is plugged in, and the right command set follows from that.
What sharkfin does with the 5108S
- sharkfin will identify this board and read its settings, but it will not write to it. Its command set is not established, and the two protocol families in this hardware share opcodes that mean different things, so a misaddressed write would land on a live register.
- You can help: the app's Contribute tab collects a read-only data bundle to paste into an issue. That is how a board moves from read-only to supported.
sharkfin has no drawn layout for the 5108S yet, so it shows a grid of the board's 128 matrix slots instead. Everything still works; only the picture is missing. You can fix that for everyone: draw the board on the app's Keys page, which checks each key against your keyboard as you go, and send the result back.
5108S at a glance
| Brand | akko |
| Model | 5108S |
| USB ID | 0461:4003, 3151:4003 |
| Device ID | 455, 652 |
| Protocol family | unknown |
| Settings writable | no, read-only |
| Drawn layout | no, shown as a slot grid |
| Onboard profiles | 4 |
A protocol family of “unknown” means sharkfin has not established which command set this revision speaks, which is exactly why it stays read-only.
Connecting
Plug the 5108S in with a USB cable, or use its 2.4 GHz receiver if it has one. Bluetooth has no configuration channel, so a Bluetooth pairing will not do. Settings are stored on the keyboard itself, so everything you change keeps working wirelessly once you unplug. sharkfin never flashes firmware, so there is nothing here that can brick the board. On Linux, both the browser and the app need a one-line udev rule before they can open the keyboard. And if you are hunting for a polling-rate or report-rate setting: there is none in sharkfin, because this hardware does not expose one.
If the 5108S stops responding
It happens: the firmware stops answering and the app says the board needs a replug. Typing keeps working the whole time. In order:
- Close sharkfin, or the browser tab. While either is open it keeps trying to reach the board.
- Unplug the cable, wait ten seconds, plug it back in. The board needs to lose power, not just reconnect.
- Fn + Home turns the lighting back on if the backlight looks dead.
- Fn + Esc, held for about three seconds, resets the board's settings.
None of this touches firmware; nothing here can leave the 5108S unusable.
5108S revisions
| Device ID | USB ID | Controller | Family | Writable | Layout |
|---|---|---|---|---|---|
| 455 | 0461:4003 | yc300_5108s_dm | unknown | read-only | slot grid |
| 652 | 3151:4003 | yc300_5108s_white_dm | unknown | read-only | slot grid |
Other akko boards
3084BP-ISO-DE · 3084BP-ISO-UK · 3084S · 3087S US · 3098B Plus · 3098S · 3108 V3 · 5075 V3 · 5075 V3 HE · 5075 V5 · 5075 V5 HE · 5075 V5 HE ISO · 5075 V5 HE TMR · 5075 V5 HE-B