Model IDs

A Model ID is a string Logitech's tools use to identify a product. OpenLogi uses it to store per-device configuration and locate device renders and hotspot data.

Model ID structure

Devices report two kinds of identity data through 0x0003 deviceInformation:

• model_id: up to three PIDs, one for each transport enabled by the firmware. Unused entries are 0000.
• extended_model_id: one byte used for production attributes such as the colour batch.

model_id supports these transports:

• usb: wired USB
• equad: the RF protocol used by Unifying receivers
• btle: Bluetooth Low Energy, also used by Bolt receivers
• bt: Bluetooth Classic

openlogi list displays both fields under each paired device:

     model_ids=[b042,0000,0000] ext=02 serial=— unit_id=00010203 transports=usb+equad

The registry's Model ID joins the extended byte and the first PID:

model id = {extended_model_id:x}{model_id[0]:04x}

For example, ext=02 and model_ids=[b042,…] produce 2b042.

Four-digit Model IDs contain only the PID. Older asset depots and products that the registry identifies only by USB PID usually use this format. Examples include receivers (c548), webcams (085e), and G-series audio devices (0a9b).

Match by the last four digits

The extended value in the registry does not always match the value reported by the device. For example, the MX Master 4 is listed as 2b042, but the device reports ext=01.

The same product can also report a different PID for each transport. The MX Master 3S reports b034 over Bluetooth Low Energy and b043 through a receiver. The registry lists both PIDs.

OpenLogi first matches the full ext + pid, then the trailing four-digit PID. If neither matches, it uses the firmware codename to find the product name in the registry. Search this page by the four-digit PID reported by the device rather than relying on the extended value.

Index

Each row represents one product in the registry and includes all its Model IDs. A Model ID is not a unique key. The same G915 has old and new asset depots, and a racing wheel base's PID is repeated in the entries for compatible rims. A few IDs therefore appear on more than one row.

Some products have no HID++ identity. The registry uses the asset depot name in place of an ID, as it does with g29. This page keeps those original values.

The same data is available at /model-ids.json, in the same order as the table. Each item has the shape { ids, name, kind, depot, render }, so scripts can read it directly. depot is the device's asset directory on assets.openlogi.org, and render is its main image.

Limitations

• The data comes from the asset registry. This page includes only products for which Logitech has published assets, including some G-series wheels, pedals, and headsets. Products without public assets do not appear here, but they may still have valid Model IDs.
• Only IDs published by the registry are included. A device can report up to three PIDs, but most asset depots publish only one. The PID reported by a device may therefore be missing from this page. Searching by the last four digits avoids mismatches caused only by a different extended value.
• Receivers are listed as separate products. The table identifies each one by its USB PID. See Receivers for how OpenLogi communicates with them.
• Being listed does not imply support. OpenLogi opens any Logitech HID interface with an HID++ vendor-defined collection, so an unlisted device may still work with OpenLogi. Conversely, OpenLogi does not configure the headsets and microphones listed here. See Supported devices for the features exposed by each product.