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Problems & Fix

Latest Update: 2025.07.03


Connect Bluetooth

Connect USB

DFU mode

Connect Bluetooth


Can't connect with Bluetooth


  1. On your device, forgot Designer Keyboard

  2. On your device, and turn off and turn on bluetooth function.

  3. Tap "BT_DISC 0" for bluetooth devices 1 on adjust layer.

  4. Tap "OUT_BLE".

  5. Try to connent again.

  6. Optinal: If it still doesn't working,  tap "BT_CLR_ALL" for delete all Bluetooth devices,  and back to step.


Keyboard connected to device, ut it can't typing

  1.  Tap "OUT_BLE" and try again.

  2. Or try to reconect the bluetooth, see "Can't connect with Bluetooth"



Can't connect the first bluetooth device for BT_SEL 2

  1.  Try to add the device one by one from BT_SEL 0, BT_SEL 1, BT_SEL 2 and so on.


Right Keyboard is not working

  1. Check the battery and turn on RIGHT keyboard first.

  2. Place left and right keyboard together.

  3. Restart LEFT keyboard.

  4. Right keyboard will connect to left keyboard automatically.

  5. If still not works, flash the right keyboard, and try again from step 1.


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Connect USB


Can't type by pulg in with  USB cable

  1.  Tap "OUT_USB".

  2.  Try to use other USB cable.

  3.  If it still doesn't working, please contact us.



Only works with USB cable

  1. Change other AAA batteries.

  2. If it still doesn't working, please contact us.

DFU Mode


After flash on DFU mode, it shows error (code -43)

  1. Turn on the DFU mode and try to flash again.

  2. Sometimes, it may shows error 2-3 times continuously.

  3. Or check the coding and bulid a new UF2 file from qmk frimware, and flash again.



How to trun off DFU mode?

  1. It will turn off 2-3 mins automatically.

  2. Restart the keyboard.



Can't typing and can't turn on DFU mode

  1. Try to press DFU button 2 times in 1 sec.

  2. Or tap "Bootloader" on adjust layer.

  3. If it still doesn't working, please contact us.


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