0x8080 · perKeyLighting

An earlier HID++ 2.0 per-key (per-zone) RGB lighting control feature targeting RGB keyboards and other Logitech peripherals with individually addressable LED zones. It defines a staged commit model — zone colours are written in one or more requests and then committed to the device display in a single frame-end call — and a mechanism for querying which zone IDs are physically present on the device. 0x8081 perKeyLighting2 is the revised successor to this feature and is what OpenLogi's vendored hidpp crate implements.

What it does

0x8080 perKeyLighting provides the foundational per-key RGB lighting protocol from which 0x8081 was derived. In general terms it offers:

• Zone presence queries — the host can ask the device which zone IDs are populated so that only valid targets are addressed.
• Zone colour staging — one or more functions allow the host to write RGB colour values to individual or groups of zones without immediately affecting the display.
• Frame commit — a dedicated call flushes the staged colours to the hardware and controls frame-timing parameters, with an option to persist the result to non-volatile storage.
• Multiple setter strategies — like its successor, the feature likely includes setters that trade off between the number of zones addressed per request and the flexibility of zone selection (individual, consecutive, range-based).

Because 0x8081 is the deployed successor, devices that report 0x8080 are older models; the two features share the same conceptual model but differ in the precise function table and payload layout. Do not rely on this page for wire-format details — consult the official Logitech HID++ specification for 0x8080 directly.

Status: Not implemented · Feature ID: 0x8080 · See also: 0x8081 perKeyLighting2