Solaar's old rotating sw_id (cycling 0x2..0xF on every request) eats
HID++ replies addressed to other userspace clients sharing the same
device, because reply matching is feature + function + sw_id only and
Solaar eventually claims every value in the range. Cooperative use
with OpenRGB, LGSTrayEx, etc. is impossible by construction.
Pick one value and hold it. Other tools can pick a different one and
filter Solaar's traffic out of their reply stream cleanly.
0x07 OpenRGB
0x0A LGSTrayEx
0x0D Logitech G HUB (host-side)
0x0F Logitech firmware (sub-device self-enumeration on wired)
0x0B is unallocated among the above and keeps the high bit set so
replies stay trivially distinguishable from notifications (sw_id=0).
Audit of why nothing breaks:
- Reply matcher in request() still works — Solaar's request loop is
synchronous per device, so (feat, func, fixed_sw_id) is enough to
identify the in-flight request's reply. The rotation never bought
uniqueness across processes; it only avoided self-collision across
successive synchronous requests, which doesn't exist as a problem.
- Ping reply identification uses a separate random mark byte
(getrandbits(8) appended to the request data, checked at byte 4 of
the reply). That randomization is unchanged.
- Stale-reply protection comes from _read_input_buffer draining the
device handle before every new write. A delayed reply from a prior
timed-out request gets routed to the notification hook, not
mistaken for the current request's reply — independent of whether
sw_id rotates.
- The "separate results and notifications" claim in the old docstring
was misleading: true notifications carry sw_id=0 per the HID++ spec.
What actually keeps replies distinguishable is the high bit being
set, which 0x0B preserves.
- Centurion bridge in device.py uses the same sw_id-as-correlation-
token pattern with the same synchronous-per-device flow; fixed sw_id
works identically.
* Add Centurion transport and PRO X 2 LIGHTSPEED headset support
Adds support for the Logitech PRO X 2 LIGHTSPEED Gaming Headset (PID 0x0AF7)
which uses the Centurion transport protocol (report ID 0x51 on USB usage page
0xFFA0) instead of standard HID++ report IDs.
Changes:
- HID enumeration: detect Centurion devices via report descriptor parsing
(usage page 0xFFA0, report ID 0x51, 63-byte frames)
- Centurion transport: wrap/unwrap HID++ 2.0 frames in Centurion framing
for write, read, and ping operations
- Feature discovery: enumerate features individually on Centurion devices
(different response format: [remaining_count, feat_hi, feat_lo])
- Device descriptor for PRO X 2 LIGHTSPEED Gaming Headset
- New feature enum entries for Centurion-era headset features (0x06xx)
- CenturionRawRW class for write-only headset settings controlled via
raw Centurion commands reverse-engineered from HeadsetControl
- HeadsetSidetone setting (0-100 range, persisted locally)
Known limitations:
- Only sidetone control is implemented; other features need RE work
- Settings are write-only (no read-back from device)
- Headset features (0x06xx) not discoverable via IRoot; registered manually
* Remove static PRO X 2 descriptor; fully probe Centurion devices at runtime
Replace the hardcoded descriptor entry with dynamic discovery of all device
properties via the Centurion protocol. The headset name, kind, serial,
firmware, and battery are now probed at runtime — matching how the device
actually presents itself rather than relying on static data.
Key changes:
- Discover sub-device features via CentPPBridge and route requests through
the bridge automatically
- Infer device kind from feature IDs (0x06xx = headset) for both wireless
and direct USB connections
- Read device name from USB product string with protocol probe fallback
- Parse bridge error responses (sub_feat_idx=0xFF) instead of timing out
- Handle unknown HID++ error codes gracefully in base.py
- Fix firmware deduplication for Centurion parent devices
- Prefer sub-device serial/firmware over parent (non-printable) values
- Add Centurion-aware display in solaar show with parent/sub-device sections
- Support both wireless (0AF7 dongle) and direct USB (0AF8) connections
* Display Centurion dongle as receiver with headset as child device
- Add CenturionReceiver class that provides the Receiver UI interface so
the dongle appears as a parent with the headset indented underneath,
matching how Lightspeed/Unifying receivers display
- Independently probe dongle features via feature_request() on the
CenturionReceiver, separate from headset features via bridge
- Fix bridge notification dispatch: remove incorrect sub_cpl=0xFF filter
that was silently dropping all battery and other notifications
- Fix battery status decoding: charging status is at byte 2 (not byte 1)
of the CENTURION_BATTERY_SOC response
- Detect wired vs wireless by checking for CentPPBridge in discovered
features; wired headsets fall back to standalone Device
- Name the dongle "Centurion Receiver" to distinguish from the headset
- Filter unprintable dongle serial (control characters 0x14-0x1F)
- Update CLI show output with proper receiver/child hierarchy and spacing
* Fix headset setting validators and code formatting
- Add signed int8 support to RangeValidator for HeadsetMicGain (0x0611)
- Make HeadsetSidetone version-aware: v1 uses 2-byte skip, v2+ uses
3-byte skip with 0xFF separator per protocol spec
- Fix ruff formatting in device.py, listener.py, udev_impl.py
- Update CenturionReceiver test for renamed receiver
* Use ConnectionStateChangedEvent for headset online/offline detection
Replace ad-hoc heuristics with proper bridge event function dispatch:
- Function 0 (ConnectionStateChangedEvent): parse sub-device list length
to determine connect (len>0) vs disconnect (len=0)
- Function 1 (MessageEvent): fallback online detection if headset sends
a message while marked offline (handles cold-start power-on)
Remove CPL sub_id>=0x80 fallback in listener that misidentified HID++
error replies as disconnect events. Skip HID++ 1.0
set_configuration_pending_flags for CenturionReceiver (not supported).
Also adds OnboardEQ (0x0636) support, bridge multi-fragment sends,
bridge-based headset ping probe, and CLI offline display.
* Update PRO X 2 LIGHTSPEED device doc with current solaar show output
* Fix Centurion protocol version display (1.16 not 2.6)
The HID++ ping math (major + minor/10.0) produced a bogus "2.6" for
Centurion devices whose ProtocolCapabilities returns major=1, minor=0x10.
Store the raw (major, minor) bytes from the ping response and display
them correctly as "Centurion 1.16" in both CLI and GUI.
* Add OnboardEQ (0x0636) support for Centurion headsets
Implement host-computed biquad EQ coefficient generation and multi-fragment
bridge writes for the PRO X 2 LIGHTSPEED headset's 5-band parametric EQ.
The coefficient algorithm uses standard Audio EQ Cookbook peaking EQ formulas
with a simplified rescale normalization (max_b0 × 1.19 headroom). This is our
own implementation — not an exact replica of LGHUB's ~350-line per-band cascade
normalization — but it produces functionally correct results. The DSP
compensates via the rescale factor, and the EQ changes are audible and working
on real hardware.
Wire format verified against 38 LGHUB pcap writes:
- 4-byte LE section headers, LE uint16 coefficient words
- Mixed Q1.31/Q2.30 fixed-point with 24-bit precision
- Only b-coefficients divided by rescale; a-coefficients unchanged
- Two sections: 48kHz playback + 16kHz mic
- No trailing padding, no extra words between sections
Changes:
- base.py: Add flags parameter to write_centurion_cpl() for multi-fragment CPL
- device.py: Rewrite multi-fragment bridge send — proper CPL fragmentation with
fragment 0 carrying bridge prefix/hdr and continuations carrying raw sub_msg,
all fragments sent back-to-back without intermediate ACKs
- hidpp20.py: Replace placeholder coefficient code with full biquad math,
mixed Q-format quantization, rescale normalization, and dual-section output
- settings_templates.py: Persist EQ to slot 0x80 after writing to slot 0x00
so settings survive power cycle
- tests: Update expected SetEQParameters payloads for new coefficient format
* Extract Centurion protocol into separate modules
Move CenturionReceiver class, factory function, and Centurion protocol
queries (firmware, serial, hardware info, battery, name) from device.py
and hidpp20.py into new centurion.py module. Move OnboardEQ biquad math
and payload builders from hidpp20.py into new onboard_eq.py module.
Move _read_usb_product_string() to common.py to avoid circular imports.
Re-exports preserve backward compatibility for all existing callers.
* Add vertical graphic EQ slider widget for headset equalizer
Replace horizontal slider rows with a traditional graphic EQ layout
using vertical sliders side-by-side, with dB value display and
frequency labels per band.
* Fix device online state clobbered by debug ping in _status_changed
The INFO-level logging guard in _status_changed() called device.ping()
before logging, purely to show accurate online status. But ping() has
side effects — it sets device.online based on the result. When a
ConnectionStateChangedEvent correctly marked a device online, the
subsequent _status_changed() callback would re-ping. If the device
wasn't ready yet (e.g. Centurion headset still booting), the ping
timed out and set online back to False, requiring 2-3 power cycles
to sync state.
Remove the unnecessary ping — the log message already reads
device.online which reflects the state set by the event handler.
* Sort feature constants by ID and add PROFILE_MANAGEMENT
Move RPM_INDICATOR/RPM_LED_PATTERN (0x807A-B) before PER_KEY_LIGHTING
(0x8080-81), sort five Centurion-era headset entries into their correct
positions by feature ID, and add missing PROFILE_MANAGEMENT = 0x8101.
* Add CenturionCoreFeature enum for colliding feature IDs
Centurion transport reuses HID++ 2.0 feature IDs 0x0000, 0x0001,
0x0003, 0x0005, 0x0007 with different meanings. Since SupportedFeature
(IntEnum) requires unique values, create a separate CenturionCoreFeature
enum and resolve_feature() helper for transport-aware lookup.
Also replace the +0x100 offset hack in FeaturesArray.inverse with a
dedicated sub_inverse dict for sub-device feature indexing.
* Fix ruff I001 import sorting in centurion.py and hidpp20.py
* Add 9 missing centurion/headset feature names
Add feature constants split out from the HID++ 2.0 names PR (#3153):
CENTURION_LED_BRIGHTNESS (0x0110), CENTURION_EU_POWER_MODE (0x0115),
CENTURION_DEVICE_BOOL_STATE (0x0116), HEADSET_ADVANCED_PARA_EQ (0x020D),
HEADSET_MIC_TEST (0x020E), HEADSET_EQ_STYLES (0x0213),
BT_HOST_INFO (0x0305), LIGHTSPEED_PAIRING (0x0309),
BT_GAMING_MODE (0x030A).
* Extract _record_ping_protocol helper so all ping paths capture Centurion version
The raw Centurion (major, minor) pickup was only in the Centurion-child
dongle branch of Device.ping(). Wired Centurion variants (e.g. PRO X 2
LIGHTSPEED 046d:0AF8) go through the generic fallback branch and never
recorded the raw version, so they displayed "Centurion 2.6" instead of
"Centurion 1.16".
Extract the protocol + centurion version recording into a helper and
call it from both branches.
---------
Co-authored-by: Peter F. Patel-Schneider <pfpschneider@gmail.com>
* refactoring(logitech_receiver/notifications): change to enums PairingError and BoltPairingError
* refactoring(logitech_receiver/notifications): change to enums PairingError and BoltPairingError (Fix pre-commit checks)
* refactor(logitech_receiver/base.py): create unit tests for ping function before replacing ERRORNamedInts by IntEnum
* refactor(logitech_receiver/base.py): create unit tests for request function before replacing ERROR NamedInts by IntEnum
* refactor(logitech_receiver/base.py): create unit tests for ping function before replacing ERRORNamedInts by IntEnum (add exclusion for macOS)
* refactor(logitech_receiver/base.py): create unit tests for ping function before replacing ERRORNamedInts by IntEnum (fix for python < 3.10)
* refactor(solaar/cli./probe.py): create unit tests for run function before replacing ERROR NamedInts by IntEnum (focusing on the call order when receiving errors)
* refactor(solaar/cli./probe.py): refactor register processing to handle short and long registers in a single loop structure for improved readability and reduced code duplication.
* refactor(logitech_receiver/hidpp10_constants.py): replace ERROR NamedInt by IntEnum.
* refactor(logitech_receiver/hidpp10_constants.py): distinguish hidpp10 and hidpp20 errors in the code for readibility.
* refactor(logitech_receiver/hidpp20_constants.py): replace ERROR NamedInt by IntEnum.
* refactor(logitech_receiver/hidpp20_constants.py): replace ERROR NamedInt by IntEnum. (fix problem with | operator when typing with python 3.8)
* feature(hide on startup option): Visual test (not binded yet) DRAFT
* refactor(solaar/cli./probe.py): create unit tests for run function before replacing ERROR NamedInts by IntEnum (focusing on the call order when receiving errors)
* refactor(solaar/cli./probe.py): refactor register processing to handle short and long registers in a single loop structure for improved readability and reduced code duplication.
* refactor(logitech_receiver/hidpp10_constants.py): replace ERROR NamedInt by IntEnum.
* refactor(logitech_receiver/hidpp20_constants.py): replace ERROR NamedInt by IntEnum.
* refactor(logitech_receiver/hidpp20_constants.py): replace ERROR NamedInt by IntEnum. (fix problem with | operator when typing with python 3.8)
* feature(hide on startup option): Visual test (not binded yet) DRAFT
* Merge: Refactor: hidpp20 to use enum
* Merge: Refactor: hidpp20 to use enum (fix test)
---------
Co-authored-by: some_developer <some.developper.44@gmail.com>
* Remove duplicated Param definition
Use constants from hidpp20 constants
Related #2273
* hidpp20/Param: Refactor to use IntEnum
Related #2273
* hidpp20_constants: Refactor to use IntEnum
Related #2273
Warnings found by automatic code inspection and partially tackled
- Drop distuitls inf favour of setuptools
- Replace deprecated pyudev.Device.from_device_number
- Remove unnecessary brackets
- Avoid access to private variables etc.
- Shadows built-in name
- Line length >120 characters
- Not a module level variable
- Simplify clause
and more
The hidapi hardware layer must not know or depend on any UI libraries.
Removes all GDK dependencies from the hidapi packages, which makes
testing of these modules easier and removes unwanted cross-dependencies.
Related #2480
device: move some imports to top of modules
device: break up imports loop with device descriptors
device: break up imports loop by moving a function from notifications.py to setting_templates.py
device: break import loop between device.py and diversion.py by using device to access method
Ken Sanislo
Ken Sanislo
Peter F. Patel-Schneider
MattHag
Romain Loutrel
MattHag