10f8:c581 — EFM02
Cesys GmbH
- Vendor ID
- 10f8
- Product ID
- c581
- Combined
- 10f8:c581
- Decimal
- 4344:50561
What is this device?
This is the USB identifier for a EFM02 manufactured by Cesys GmbH. The vendor ID 10f8 is registered to Cesys GmbH with the USB Implementers Forum, and c581 is the product ID that Cesys GmbH assigned to this particular model. When you run lsusb on Linux, this device appears as 10f8:c581 Cesys GmbH EFM02.
How to identify it on your system
Linux
$ lsusb Bus 001 Device 004: ID 10f8:c581 Cesys GmbH EFM02
You can filter directly with lsusb -d 10f8:c581, or get the full descriptor dump with lsusb -v -d 10f8:c581. Kernel messages from dmesg show the same pair as idVendor=10f8, idProduct=c581.
Windows
In Device Manager, open the device, go to Details → Hardware Ids. This device reports:
USB\VID_10F8&PID_C581 USB\VID_10F8&PID_C581&REV_0100
From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_10F8&PID_C581"
macOS
$ system_profiler SPUSBDataType
EFM02:
Product ID: 0xc581
Vendor ID: 0x10f8 (Cesys 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:
10f8 Cesys GmbH c581 EFM02