devhidraw1

devhidraw1, more commonly referred to as /dev/hidraw1, is a Linux device node that represents a HID raw interface provided by the hidraw driver. The hidraw subsystem offers a direct, unfiltered channel to USB and Bluetooth Human Interface Devices (HIDs), allowing user space programs to exchange HID reports without going through the higher level input event subsystem. When a HID device is connected and bound to the hidraw driver, the kernel creates one or more nodes named /dev/hidrawN, where N is a small integer such as 0, 1, or 2.

Access to /dev/hidraw1 is typically used to read raw HID reports from a device and, for devices that support output reports, to write those reports back to the device. This interface is commonly used for debugging, custom hardware interfacing, or when developers need to interpret a device’s HID protocol directly rather than through the standard input abstractions. Permissions are controlled by the file system, so access usually requires root privileges or membership in a suitable group via udev rules.

To identify which HID device corresponds to a given hidraw node, one can inspect sysfs entries under /sys/class/hidraw/hidrawN, which provide details such as vendor and product IDs and the associated USB or Bluetooth device. Not all HID devices expose a /dev/hidraw node; some are handled solely by the generic input subsystem and appear under /dev/input. The hidraw interface provides lower-level access and should be used with awareness of potential security and privacy implications.