OpenLogi0x00d0 · dfu
Stream a signed firmware image to a device already in DFU mode — write chunks, track progress, and trigger verification and restart.
A HID++ 2.0 feature that carries the Device Firmware Upgrade (DFU) protocol
itself: the data-transfer phase that streams new firmware images to a device
after it has already entered DFU mode. It applies to the full range of
Logitech HID++ peripherals (mice, keyboards, headsets, receivers, and
touchpads) that support in-field firmware updates. It works with 0x00c2
dfuControlSigned, which governs the mode transition that precedes the
transfer.
Not implemented in OpenLogi
OpenLogi's vendored hidpp crate does not provide a typed wrapper for this feature yet. The notes below summarise the HID++ feature in general terms, not OpenLogi behaviour. OpenLogi instead relies on 0x00c2 dfuControlSigned where applicable.
What it does
- Starts a transfer, naming the target firmware entity (main application, bootloader, hardware module) and the expected image size.
- Streams the payload in fixed-size blocks over HID++ reports.
- Reports status and progress: how much of the image the device has accepted, and any transfer error.
- Finalises the transfer, upon which the device verifies, commits, and restarts on the new firmware.
The feature operates only while the device is in DFU mode (entered via
0x00c2 dfuControlSigned); it is not available during normal operation.
Images must be cryptographically signed by Logitech; the device rejects
unsigned or tampered payloads before committing them.
Status: Not implemented · Feature ID:
0x00d0· See also: 0x00c2 dfuControlSigned