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bzaurie

Member

Registered: 2022-10-09

Posts: 6

Cooler master CK721 not working in WIFI mode

Hello.

How one goes about pairing a WIFI 2,4 GHz keyboard? Should it work out of the box or is additional software neccessary?

lsusb lists the wifi dongle:

...
Bus 001 Device 002: ID 2516:01c3 Cooler Master Co., Ltd. Cooler Master Keyboard Dongle
...
Bus 003 Device 010: ID 2516:016d Cooler Master Co., Ltd. CK721 Hybrid Mechanical Keyboard // wired

dmesg -w

// when switching to wifi mode with toggle by the side of the keyboard
[ 3839.600119] usb 3-2: USB disconnect, device number 12

// when switching back to wired mode with the toggle
[ 3842.512486] usb 3-2: new full-speed USB device number 13 using xhci_hcd
[ 3842.661126] usb 3-2: New USB device found, idVendor=2516, idProduct=016d, bcdDevice= 0.94
[ 3842.661132] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 3842.661134] usb 3-2: Product: CK721 Hybrid Mechanical Keyboard
[ 3842.661136] usb 3-2: Manufacturer: COOLE MASTER
[ 3842.661138] usb 3-2: SerialNumber: CK721
[ 3842.682177] input: COOLE MASTER CK721 Hybrid Mechanical Keyboard as /devices/pci0000:00/0000:00:08.1/0000:0d:00.3/usb3/3-2/3-2:1.0/0003:2516:016D.0030/input/input60
[ 3842.905832] hid-generic 0003:2516:016D.0030: input,hidraw7: USB HID v1.10 Keyboard [COOLE MASTER CK721 Hybrid Mechanical Keyboard] on usb-0000:0d:00.3-2/input0
[ 3842.912227] input: COOLE MASTER CK721 Hybrid Mechanical Keyboard as /devices/pci0000:00/0000:00:08.1/0000:0d:00.3/usb3/3-2/3-2:1.1/0003:2516:016D.0031/input/input61
[ 3842.912332] hid-generic 0003:2516:016D.0031: input,hidraw8: USB HID v1.10 Mouse [COOLE MASTER CK721 Hybrid Mechanical Keyboard] on usb-0000:0d:00.3-2/input1
[ 3842.920281] input: COOLE MASTER CK721 Hybrid Mechanical Keyboard as /devices/pci0000:00/0000:00:08.1/0000:0d:00.3/usb3/3-2/3-2:1.2/0003:2516:016D.0032/input/input62
[ 3842.972239] hid-generic 0003:2516:016D.0032: input,hiddev99,hidraw9: USB HID v1.10 Keyboard [COOLE MASTER CK721 Hybrid Mechanical Keyboard] on usb-0000:0d:00.3-2/input2
[ 3842.979180] hid-generic 0003:2516:016D.0033: hiddev100,hidraw10: USB HID v1.10 Device [COOLE MASTER CK721 Hybrid Mechanical Keyboard] on usb-0000:0d:00.3-2/input3

I read the keyboard should he handled by usbhid, checked and it's loaded.
Thanks for taking the time to help.
P.

bzaurie

Member

Registered: 2022-10-09

Posts: 6

Re: Cooler master CK721 not working in WIFI mode

Alright I sorted it out. Only quickstart guide was included with the board, which didnt state the procedure of pairing the device (proper manual on the internet did). For anybody with a similar problem: you have to first switch the toggle to "wifi" position and then insert the dongle to USB port. No additional steps required - the board started working instantly.
Even though nobody answered, do I need to edit the title as [solved]?

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 23,841

Re: Cooler master CK721 not working in WIFI mode

You should as it might help other people.

Distarfas

Member

Registered: 2025-01-06

Posts: 1

Re: Cooler master CK721 not working in WIFI mode

Alright I sorted it out. Only quickstart guide was included with the board, which didnt state the procedure of pairing the device (proper manual on the internet did). For anybody with a similar problem: you have to first switch the toggle to "wifi" position and then insert the dongle to USB port. No additional steps required - the board started working instantly.
Even though nobody answered, do I need to edit the title as [solved]?

Hello,

I have the same keyboard and followed these steps to set up the usb dongle to work with the keyboard. The keyboard starts working for for 3 keystrokes then stopped working (I typed in "aze" then it stops working). Any ideas why this happens or where can I find more logs about this issue ?

I'm currently on kernel version "6.12.8-arch1-1".

"lsusb" outputs

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
...
Bus 003 Device 016: ID 2516:01c3 Cooler Master Co., Ltd. Cooler Master Keyboard Dongle
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

latest "dmesg -w" outputs

[ 4870.293499] usb 3-1.1: USB disconnect, device number 15
[ 4875.443258] usb 3-1.1: new full-speed USB device number 16 using xhci_hcd
[ 4875.626437] usb 3-1.1: New USB device found, idVendor=2516, idProduct=01c3, bcdDevice= 1.26
[ 4875.626454] usb 3-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 4875.626460] usb 3-1.1: Product: Cooler Master Keyboard Dongle
[ 4875.626465] usb 3-1.1: Manufacturer: COOLER MASTER
[ 4875.646383] input: COOLER MASTER Cooler Master Keyboard Dongle as /devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1.1/3-1.1:1.0/0003:2516:01C3.002A/input/input58
[ 4875.803999] hid-generic 0003:2516:01C3.002A: input,hidraw4: USB HID v1.11 Keyboard [COOLER MASTER Cooler Master Keyboard Dongle] on usb-0000:00:14.0-1.1/input0
[ 4875.805425] input: COOLER MASTER Cooler Master Keyboard Dongle as /devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1.1/3-1.1:1.1/0003:2516:01C3.002B/input/input59
[ 4875.805951] hid-generic 0003:2516:01C3.002B: input,hidraw5: USB HID v1.11 Mouse [COOLER MASTER Cooler Master Keyboard Dongle] on usb-0000:00:14.0-1.1/input1
[ 4875.807213] input: COOLER MASTER Cooler Master Keyboard Dongle Consumer Control as /devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1.1/3-1.1:1.2/0003:2516:01C3.002C/input/input60
[ 4875.860224] input: COOLER MASTER Cooler Master Keyboard Dongle System Control as /devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1.1/3-1.1:1.2/0003:2516:01C3.002C/input/input61
[ 4875.860510] hid-generic 0003:2516:01C3.002C: input,hidraw6: USB HID v1.11 Device [COOLER MASTER Cooler Master Keyboard Dongle] on usb-0000:00:14.0-1.1/input2
[ 4875.862167] hid-generic 0003:2516:01C3.002D: hiddev97,hidraw7: USB HID v1.11 Device [COOLER MASTER Cooler Master Keyboard Dongle] on usb-0000:00:14.0-1.1/input3
[ 4875.863836] hid-generic 0003:2516:01C3.002E: hiddev98,hidraw8: USB HID v1.11 Device [COOLER MASTER Cooler Master Keyboard Dongle] on usb-0000:00:14.0-1.1/input4

I'm thinking the event "USB disconnect, device number 15" is when I unplug my dongle and then plug it in again.

I'm new here so let me know anything I did wrong.

Thanks in advance.