1 New Function
This firmware contains all the functions of firmware V39.
- Clear the bug of multiple button reactions when using the 3.5mm audio interface in keyboard mode (B11, B12 layout).
- In keyboard mode (B11, B12 layout), optimize the effective reporting rate, which can be maintained at about 1ms continuously；
- Added B12 layout. Both B14 and B15 keys are Space keys, which are suitable for 7-key games.
- Optimize LED lighting effects.
2 Firmware download
3 Firmware Burn Tutorial
3.1 HOST Firmware
1. Unplug the K28 USB-C cable, press B42 + B44 without letting go, insert the USB-C port, and release B42 and B44 after 2 seconds.
2. Unzip the firmware archive. Open the Update V1.1.exe file and click Connect. If the Connect button turns green, the connection is successful. Otherwise, repeat action 1.
3. Click the Open files button and select the firmware file “HOST_xxxx.bin” to be upgraded.
4. Click the Update button.
5. Wait for the progress bar to complete, then replug the K28 USB-C cable.
6. Update completed.
3.2 LED Firmware
1. Unplug the K28 USB-C cable, press B41 + B43 without letting go, insert the USB-C port, and release B41 and B43 after 5 seconds.
2. Unzip the firmware archive. Open the Update V1.1.exe file and click Connect. If the Connect button turns green, the connection is successful. Otherwise, repeat action 1.
3. Click the Open files button and select the firmware file “LED_xxxx.bin” to be upgraded.
4. Click the Update button.
5. Wait for the progress bar to complete, then replug the K28 USB-C cable.
6. Update completed.
4 Q&A
Q：What should I pay attention to when updating the firmware?
A：After pressing the key combination, plug in the USB port. After inserting the USB, hold it for about 2 seconds, and then release the key combination. Windows needs some time to react. Otherwise, the K28 device cannot be connected.
Q： Can I skip the previous firmware and directly upgrade this firmware?
A：sure. This firmware has all the functions of the previous firmware.
Q：What should I do if the firmware update prompts an error?
A：The data transmission error may be caused by the poor contact of the USB interface. Just update the firmware again.
Q：I don’t like the current firmware, can I flash back to the previous version?
A：Of course, click to download the firmware, 20200221.zip
Q：How to customize my own layout?
A：Please read the manual carefully. Usually, we recommend: ①Draw the layout you want on white paper first; ②Use the key combination to enter the number of the layout you want to customize; ③Set the key value of each button; ④Save.
Q：Why is it prompting invalid when I click Connect?
A：Please do not delete the Config.ini file, if it is accidentally deleted. Please download the firmware upgrade package again and unzip it again.
Q：On Steam, how do I use the PlayStation layout?
A：If the game supports PlayStation controllers, please use any layout of the K28 Steam （B44+B13, B44+B14).