Logitech Trueforce-compatible haptics for any SimHub-supported game.
While official support for Trueforce has been steadily growing, there are still many major titles which are yet to receive support or will never get support. This plugin fills those gaps by allowing it to work everywhere SimHub does. Built on top of the wire protocol reverse-engineered by the mescon Linux driver project.
Status: Actively in development. The plugin is functional today; the default presets are still being tuned. Feedback welcome.
Note: My Reddit account was immediately banned after sharing this and all of my posts have been removed across several subreddits. If you find this useful, sharing it outside Reddit (Discord servers, sim-racing forums, YouTube) helps other drivers find it. I've appealed the ban and have yet to hear back.
For the record on what this project is: Original Windows code built on top of a wire protocol reverse-engineered by the mescon Linux driver project from USB traffic. No Logitech source, firmware, or proprietary assets are used or redistributed. GPL-2.0, same as mescon's work. Logitech trademarks are acknowledged in the section below; this project is unaffiliated.
| Wheel | USB ID | Status |
|---|---|---|
| Logitech G PRO Racing Wheel (Xbox/PC) | 046D:C272 |
Full: Trueforce haptics + game FFB pass-through |
| Logitech G PRO Racing Wheel (PS/PC) | 046D:C268 |
Full: Trueforce haptics + game FFB pass-through |
| Logitech RS50 | 046D:C276 |
Full: Trueforce haptics + game FFB pass-through |
| Logitech G923 (Xbox/PC and PlayStation/PC) | 046D (PID TBD) |
Not yet supported. Investigating, needs a USB capture to confirm. |
The G PRO and RS50 use byte-identical Trueforce packets, so the haptic layer works on both. The plugin keeps a game's normal force feedback alive by tapping it off the USB bus and mirroring it into the haptic stream. The tap resolves the wheel's HID++ force-feedback feature index automatically, so both the G PRO and the RS50 get Trueforce haptics and their native game force feedback at the same time.
The G923 is belt-driven, so it sits outside the reverse-engineered direct-drive Trueforce protocol the plugin relies on. It is not enabled yet: a passive USB capture from a G923 is needed to confirm it speaks the same Trueforce stream (and to read the exact USB product IDs of the Xbox/PC and PlayStation/PC variants) before support can be added safely. If you have a G923 and want to help, that capture is the gating step.
The plugin runs inside SimHub and drives the wheel's Trueforce haptic motor in real time, mixing several signal sources:
-
Telemetry-derived effects synthesized from live game data.
- Engine pulse: rumble at the engine's firing pattern, derived from RPM and cylinder count (auto-detected per car when possible). Idle gives a gentle hum; higher RPM lifts both pitch and intensity.
- Gear shift: a short low-frequency thud whenever the gear changes.
- ABS click: configurable haptic when ABS engages.
- Pit limiter: configurable pulsing buzz while the limiter is engaged.
- DRS: short chirp on the rising edge when the wing opens, plus an optional sustained flutter while DRS stays active. Silent on games that don't expose the flag.
- Road bumps: triggered by vertical acceleration so curbs and rough terrain rumble through the wheel. On Forza, the per-tire surface-rumble and rumble-strip fields are read directly for a richer, more accurate continuous road feel on top of the heave channel.
- Traction loss: tire-screech haptics when grip breaks (wheelspin, lockup, drift). Read directly from per-wheel slip in games that expose it (AC); inferred on the SimHub universal path from wheel-vs-ground speed plus a yaw-rate / lateral-G discrepancy check.
- Collision: amplitude-scaled thud on impact, with a soft-knee curve so harder hits feel stronger without becoming unsafe, plus a refractory window so multi-frame crashes don't stutter.
-
Audio-derived effects: WASAPI loopback captures the game's audio output (engine, tire, impact sounds) and feeds it into the wheel as low-latency haptics. Lets you feel things the telemetry doesn't expose, and works even for games which do not output telemetry data since capture targets the game process directly.
-
FFB pass-through. When a game already drives the wheel via standard HID++ force feedback (Assetto Corsa does), the plugin transparently taps that signal off the USB bus and mirrors it into the Trueforce stream so cornering load coexists with the haptic effects above.
All of it is configurable per-game, per-car, via SimHub's settings UI: master gain, individual effect tuning, sidechain ducking between continuous and transient effects, and savable preset library.
Some games (Assetto Corsa being the worst offender we've seen) deliver curb and collision FFB spikes wildly out of proportion to what's safe or comfortable. On a strong wheelbase they can ruin a racing line or cause real wrist strain over a session. iRacing has a built-in softener; most other games don't. The plugin taps the game's outgoing FFB on the USB bus and attenuates spikes only, so curbs land as confident pushes instead of yanks while sustained cornering load and weight transfer pass through untouched. Works in any game whose FFB goes through standard HID++. Requires one of the supported Trueforce wheels above (the attenuated signal reaches the wheel through the Trueforce endpoint). Useful on its own, even with all our other effects turned off.
The easiest path is the bundled installer:
- Download
TrueforceForAll-Setup.exefrom the latest release. - Close SimHub if it's running.
- Run the installer. It detects SimHub, copies the plugin files into the SimHub install folder, and (if USBPcap isn't already installed) runs the bundled USBPcap setup automatically.
- Close Logitech G HUB (it claims the wheel's HID interface).
- Launch SimHub. The plugin auto-enables on first run.
The installer is conservative on uninstall: it removes our files but leaves SimHub, USBPcap, and shared dependencies (HidSharp, NAudio) alone, so other plugins that share those keep working.
- Windows 10 / 11
- SimHub
- A supported Logitech wheel (table above)
- USBPcap, bundled with our installer if you don't already have it. Used to mirror the game's existing FFB signal into the Trueforce stream so the two coexist.
- Logitech G HUB closed while playing (it claims the HID interface and blocks us from talking to the wheel)
By default the plugin runs on SimHub's universal 60 Hz telemetry feed, which carries the standard fields all the core effects need. SimHub is free but the 60 Hz feed requires a licensed copy of SimHub, which carries a small one-time payment.
Some titles read directly from the game's telemetry, bypassing SimHub's limitations and the need for a licensed copy (Assetto Corsa, Forza Horizon 4, 5, and 6).
Assetto Corsa has a dedicated path: shared memory is read directly at AC's native 333 Hz physics rate (polled at 1 kHz so events are seen within 1 ms of being written). The higher rate makes curb collisions, road-bumps, traction-loss and other haptic effects noticeably sharper and more responsive than SimHub's 60 Hz feed can deliver.
Forza Horizon 4, 5 and 6 also have a direct UDP Data Out reader that picks up per-tire fields for the surface-texture, rumble strips, and curb collision effects. This additional surface information is updated at 60 Hz but allows for more depth in surface detail effects than some other titles may offer. All three are auto-detected from SimHub's game profile, so the only setup is pointing Forza's DATA OUT at the listener's IP and port.
Additional per-title enhancements/bypasses will be added over time.
iRacing ships native Trueforce, so this plugin normally stays out of its
way. The exception is Marvin's Awesome iRacing App (MAIRA): running
MAIRA on a Logitech wheel requires setting loadTrueForceAPI=0 in
iRacing's app.ini, which turns iRacing's Trueforce fully off. This
plugin can restore the Trueforce textural haptics for MAIRA users,
running alongside MAIRA's force feedback without conflict. Step-by-step
setup is in docs/iracing-maira-trueforce.md.
On startup the plugin:
- Enumerates connected HID devices, finds the wheel's Trueforce interface
(
MI_02, vendor usage page0xFFFD). - Enumerates USBPcap interfaces and parses injected device descriptors to find which root hub the wheel is on and what USB address the OS assigned it this boot.
- Starts the FFB tap and Trueforce stream automatically.
If the wheel isn't detected (G HUB still running, USBPcap not installed, wheel unplugged) the plugin logs a clear status message and disables itself gracefully
- Logitech G HUB must stay closed the entire time the plugin is in use, not just at launch. G HUB claims the wheel's HID interface and blocks us from talking to it. If G HUB is opened mid-session, close it and reload the SimHub plugin to reattach.
- The Trueforce level dial on the wheel doesn't apply while this plugin is driving Trueforce. Once we take over the ep3 stream, the wheel's own Trueforce intensity scaling stops responding to the dial. Use the in-plugin Master Gain and per-effect Gain controls to set intensity instead.
- Validated on G PRO and RS50 + AC + Wreckfest 2 + FH5 + FH6 + iRacing with MAIRA so far. Other SimHub-supported games should work but haven't been tested by us yet. Feedback welcome.
The wire protocol (init sequence and ep3 streaming format) was reverse-engineered by the mescon Linux driver project. This repo is the Windows-side glue on top of that: a SimHub plugin that opens the wheel, synthesizes the telemetry/audio-derived effects, handles per-game tuning, and runs the USBPcap-based FFB tap that mirrors the game's HID++ output into bytes 6-9 of the Trueforce ep3 stream.
GPL-2.0-only. See LICENSE.
The wire protocol and init sequence are derived from the mescon Linux driver project, also GPL-2.0.
- mescon/logitech-rs50-linux-driver: reverse-engineered the wheel's driver and wire protocol. This project would not exist without their work.
- USBPcap by Tomasz Mon: the kernel-mode USB filter that lets us tap the wheel's bus traffic for FFB pass-through.
- mdjarv/assettocorsasharedmemory: community reference for AC's shared-memory layout, used to validate our SPageFilePhysics field offsets.
- HidSharp: cross-platform HID library used for the control-side of wheel communication.
- NAudio: audio I/O library used for the per-process loopback capture pipeline.
- ManteoMax's Forza Horizon 5 spreadsheet: the canonical community catalog mapping Forza CarOrdinal to year/make/model and engine specs. Our FH5 lookup (engine cylinder / layout / electric detection plus auto-named per-car presets) is built from this data.
- SimHub: the host application. This plugin is unofficial and not affiliated with the SimHub project.
- Caleb Pearson: reported that the plugin was not working on the RS50, exported the TF4ALL logs that helped pinpoint the cause, and validated the fix on his hardware. Without his report the RS50 issue would have gone unnoticed. He also discovered and confirmed that the plugin brings Trueforce back to iRacing when running MAIRA.
Logitech, Trueforce, G PRO, and RS50 are trademarks of Logitech. This project is not affiliated with, endorsed by, or sponsored by Logitech.