Guides
Step by step, for when you are building or fixing something.
The Ferrum Utility only runs on Windows. What works when your second PC runs Linux: the CP2102 port at 115200 baud and basic KMBox B+ Pro commands.
phantom · Oct 7, 2026
FERRUM's mouse not moving, Backend Status: Disconnected, software not moving the mouse or clicks landing too early. Fixes in order, done on your second PC.
phantom · Oct 7, 2026
Mouse not passing through FERRUM, or the board missing in the Ferrum Utility? A quick way to find a bad USB-C cable on your second PC with a device you know works.
phantom · Oct 7, 2026
How to install an older Ferrum Utility version from the Misc tab on your second PC, and why you should stay on the latest unless we ask you to roll back.
phantom · Oct 7, 2026
How to update the Ferrum Utility from its Misc tab on your second PC, what happens to FERRUM's firmware, and what to do if your board was unplugged.
phantom · Oct 7, 2026
Which FERRUM connection your DMA software needs, where to find the COM port or the Net IP and port in the Ferrum Utility, and the settings that trip people up.
phantom · Oct 7, 2026
Every MAKCU and FERRUM code in MewTools: device not found, COM port 10 or higher, port busy, cursor not moving and a failed MAKCU flash.
phantom · Oct 3, 2026
How to wire FERRUM's three ports, install the CP210x driver and the Ferrum Utility on your second PC, pick mouse or keyboard and find your COM port.
phantom · Sep 16, 2026