gamakay2 TK75 keyboard software
Remap keys, set the RGB, record macros and change device settings on the gamakay2 TK75. 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.
3 revisions of the TK75 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 TK75
- Remap any key. Click a key on a picture of the board and give it another key, a mouse button, cursor movement, the scroll wheel, a macro or a media control. Base and Fn layers both. 3 or 4 onboard profiles, by revision.
- Lighting. 18 backlight effects with direction options, full RGB colour, brightness and speed. The effect runs on a picture of the board as you change it; a slider writes to the board when you let go of it.
- Per-key colour. Paint individual keys and send the pattern to the board's flash.
- Macros. Record key and mouse sequences with per-event delays into the 50 onboard slots, then bind a key to one.
- Sleep timers for 2.4 GHz and Bluetooth, plus deep sleep.
- The knob. Only some revisions of this model have one (device ids 3060, 3138, 3167). Where it exists, turn left, turn right and press are all remappable.
- Edge light. This board has edge LEDs, so their own effect, colour, brightness and speed get their own controls.
- Device settings. Windows-key lock, WASD and arrow-cluster swap, backlight off, host-OS auto-detect and a factory reset, all from the Device page.
- Backup. Export everything to a file and restore it later.
- Magnetic switches. Some revisions have them (device ids 3138, 3167). The Switches tab writes the switch settings on the revisions whose firmware has been read (device ids 3138, 3167); on the rest it reads them, and Setup can open writes for your board.
- Screen. This board has one. sharkfin draws on it: pick a picture in the app and the board keeps it in its own flash.
sharkfin draws the TK75 key by key, so you remap on a picture of your own board. That applies to the revisions marked drawn below; the rest show a slot grid. The picture sharkfin has for the TK75 knows the board's shape but not yet which internal slot each key lives in, so the first connection includes a check: the drawing is matched against the keymap your own board reports, you confirm it once, and from then on you remap on the picture. Until then the app shows a plain grid. The check exists because two boards can share one picture and still disagree about which slot a key lives in, and a wrong guess would send a remap to the wrong key. sharkfin trusts your keyboard over its own files.
TK75 at a glance
| Brand | gamakay2 |
| Model | TK75 |
| USB ID | 3151:5002, 3151:5030 |
| Device ID | 3060, 3138, 3167 |
| Protocol family | gen2 |
| Settings writable | yes |
| Drawn layout | varies by revision |
| Onboard profiles | 3 or 4 |
| Backlight effects | 18 |
gen2 and yc500 are the two command sets these keyboards speak. The same command can mean different things in each, so sharkfin never guesses: the board names itself when it is plugged in, and the command set follows from that.
Connecting
Plug the TK75 in with a USB cable. Over a 2.4 GHz receiver sharkfin reads whatever the receiver relays: some carry the settings channel, some carry nothing, and the same model ships with both, so plug the receiver in and the app says which yours is. Writes need the cable. Bluetooth has no settings channel. Settings are stored on the keyboard itself, so everything you change keeps working wirelessly once you unplug. sharkfin never flashes firmware. On Linux, the AppImage and the browser build need a one-line udev rule before they can open the keyboard; the .deb and .rpm install it. 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 TK75 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.
- Still wrong? Open sharkfin and use Device, then Factory reset.
None of this touches firmware; nothing here can leave the TK75 unusable.
TK75 revisions
| Device ID | USB ID | Controller | Family | Writable | Layout |
|---|---|---|---|---|---|
| 3060 | 3151:5002 | yc3123_jk_tk75v3_3m_1k_soc | gen2 | yes | drawn |
| 3138 | 3151:5030 | ry5088_chiehko_tk75v5_3m_8k_8k | gen2 | yes | after a one-time check |
| 3167 | 3151:5030 | ry5088_jk_tk75v5_8k | gen2 | yes | after a one-time check |