VKB-SIM

After installing and flashing the GNX USB Controller with an SEM + FSM-GA attached, the device is no longer recognized by the software or computer. The blue LED quickly flickers when the USB is connected to a port.

If the USB controller is connected to the computer without the SEM or FSM-GA connected, the software will recognize the controller and shows the latest firmware (2.14A).

Does anyone know of a solution?

How did you connect the 2 modules?

Modules were connect with USB-C cable to JST.

If the usb controller is disconnected from the module, the PC recognizes it; otherwise, if connected to the SEM via the 4-pin or JST connector, it won't show up.

So SEM carries the controller and the JST end of cable is plugged into the SEM and connected to FSM's bus by the USB C end, right?
Try other plug inside the SEM.

No change, computer doesn't recognize the device. It'll only show up when in boot mode and disappear after firmware is flashed.

Hold in short those 2 pins on the back of the controller with a small screwdriver and plug it to USB.

If still doesn't work flash the attached firmware, it's more stable for the modules.

Thanks! The older firmware fixed the issue.

Thank you for confirmation. We're trying to find the bug, would you mind sharing some info on your computer: specifications, what other USB devices are plugged, what software is running in the background? Would really help us to understand and correct the issue, considering that only a small percent of users encounter this problem.

Hello, I'm joining the conversation because I've been having Windows recognition problems with my "GNX DUAL THQ + SEM + FSM-GA COMBO".

I followed the instructions in the YouTube video and took the opportunity to update "_GNX_USB_Controller_v2_16" via Bootloader. No particular problems on the first day, and I was even able to configure the keys on MSFS.

However, on the second day, the NXT Throttle Combos was no longer recognized by Windows. When I connected the device, a brief blue light appeared for 1/2 second.
No device detected, neither in Windows, nor in VKBDevCfg-C, even in Safe Mode.

By disassembling the device element by element, I was able to reveal two GNX-THQ modules in VKBDevCfg. But as soon as I reconnected another FSM-GA module or the SEM, I had nothing left in VKBDevCfg.
After several attempts and research on your forum, I was able to flash the firmware with the version "_GNX_USB_Controller_v2_10_8" and miraculously, I was able to use my NXT Throttle Combos again.
So there is a problem with firmware version 2.16.

If it helps, here's my configuration:
Windows 11 22H2 up to date
AMD Ryzen 7 5800x (Chipset v.08.02.027)
16GB RAM
AMD RADEON RX 6700 XT
USB: Corsair keyboard and mouse, Logitech G13