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

20240312

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

128KB

ifwsofle_20240311_ecno1.uf2

128KB

ifwsofle_20240311_ecno2.uf2

5.Code

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

14KB

ifwsofle.rar

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.