User manual

1.The usb cable can only be plugged into the left keyboard

left --> master

right --> slave (The usb plug is only used to upgrade the firmware)

2.Flash firmware button

①Connect to the computer with a data cable

②Double click the button (not single click!)

③Computer will appear a disk named "IFKB"

④Copy uf2 file to the disk and wait for the disk to disappear. The firmware upgrade is successful.

*Both hands need to upgrade firmware. The firmware file is the same file.

*The firmware does not distinguish between TRRS version and C2C version, and both can be used.

*The firmware needs to be differentiated according to the version of the knob

ecno1

The above type uses a firmware with "ecno1" in the name（ifwsofle_xxxxxxxx_econ1.uf2）

ecno2

The above type uses a firmware with "ecno2" in the name（ifwsofle_xxxxxxxx_econ2.uf2）

3.Pay attention to static electricity

4.Firmware updates log

20260110

140KB

ifwsofle_vial_20260110.uf2

Open

20240312

log：Enhanced RGB stability. If the RGB freezes, you can update it.

128KB

ifwsofle_20240311_ecno1.uf2

Open

128KB

ifwsofle_20240311_ecno2.uf2

Open

5.Code

It is advisable to modify the code if you have the programming ability, otherwise it may lead to unforeseen failures.

Updated on 20260110

1.Install QMK CLI 1.2.0 2.Clone the vial-qmk repo and checkout the correct commit (fcd56b119ea8c60142c9a03e997be5a7acba52b7)

Below is the source code for the keyboard.

17KB

ifwsofle.zip

archive

Open

The stable version of Old

1.Install QMK CLI 1.1.2 2.Clone the vial-qmk repo and checkout the correct commit (87c2fc07b6)

14KB

ifwsofle.rar

Open

We also set a CLR_EE keycode (User->CLR_EE), which is recommended to be set to the keyboard after updating the firmware, and trigger it once, and the keyboard will clear the settings.