0f11:2040 — Machine Test System
LD Didactic GmbH
- Vendor ID
- 0f11
- Product ID
- 2040
- Combined
- 0f11:2040
- Decimal
- 3857:8256
What is this device?
This is the USB identifier for a Machine Test System manufactured by LD Didactic GmbH. The vendor ID 0f11 is registered to LD Didactic GmbH with the USB Implementers Forum, and 2040 is the product ID that LD Didactic GmbH assigned to this particular model. When you run lsusb on Linux, this device appears as 0f11:2040 LD Didactic GmbH Machine Test System.
How to identify it on your system
Linux
$ lsusb Bus 001 Device 004: ID 0f11:2040 LD Didactic GmbH Machine Test System
You can filter directly with lsusb -d 0f11:2040, or get the full descriptor dump with lsusb -v -d 0f11:2040. Kernel messages from dmesg show the same pair as idVendor=0f11, idProduct=2040.
Windows
In Device Manager, open the device, go to Details → Hardware Ids. This device reports:
USB\VID_0F11&PID_2040 USB\VID_0F11&PID_2040&REV_0100
From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_0F11&PID_2040"
macOS
$ system_profiler SPUSBDataType
Machine Test System:
Product ID: 0x2040
Vendor ID: 0x0f11 (LD Didactic GmbH)Driver help
Having driver issues with this device? Most USB devices are handled by a generic class driver; if yours shows up as an unknown device, confirm the ID above first, then check the manufacturer's downloads page.
Raw usb.ids entry
The exact lines this page is generated from, in the upstream source file:
0f11 LD Didactic GmbH 2040 Machine Test System