Forza-Telemetry-Splitter

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Forza-Telemetry-Splitter

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Send Forza telemetry to several tools at once (VirtualTCU, tuners, dashboards). Auto-detects the game; UI in EN/JA/FR/DE/ES. | Forzaのテレメトリを複数ツールへ同時分配（VirtualTCU併用・自動シフト）

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# Forza Telemetry Splitter

**English** · [日本語](README.ja.md) · [Français](README.fr.md) · [Deutsch](README.de.md) · [Español](README.es.md)

Send Forza Horizon's telemetry to several tools at once.

Forza Horizon 6's "Data Out" telemetry can only be sent to one IP and port. That forces a choice:
feed [VirtualTCU](https://github.com/Forza-Love/fh6-virtual_tcu) for auto-shifting, or an auto-tuner,
or a dashboard — but not all of them together.

Forza Telemetry Splitter sits in between. It receives Forza's telemetry on its own port and re-sends
every packet, unchanged, to as many local tools as you like. The overhead is sub-millisecond and the
data is not altered, so each tool behaves exactly as if it were talking to Forza directly.

Not affiliated with or endorsed by Turn 10, Playground Games, or Microsoft. "Forza" is a trademark of
Microsoft.

## Features

| Feature | Description |
|---------|-------------|
| Fan-out | Splits Forza telemetry to any number of destinations, packets untouched. |
| Multi-game | Works with Forza Horizon 4/5/6 and Forza Motorsport (7, 2023). The game is auto-detected and named in the app. |
| Status dots | Each destination shows a status dot (Forwarding / Idle / Disabled / Error) so you can see at a glance which tools are being fed. |
| Activity graph | A second tab graphs packets/sec for the last hour (defaults to 15 min; zoom with buttons or the mouse wheel). In memory only, never written to disk. |
| Status overlay | A small pill in the top-right shows "Connected" or "No data" while you drive, with a live gear and speed readout. Toggle it from the tray. |
| Speed units | Shows mph or kph, defaulted from your Windows region and switchable in the app. |
| Tool presets | Add destinations from a list of known telemetry tools (VirtualTCU, ForzaDash, SimHub, SIM Dashboard, co-driver) or a custom IP and port. |
| Tray app | Runs quietly in the system tray, like VirtualTCU. |
| No Administrator | Only does localhost UDP, so there's no UAC prompt. |
| Start with Windows | An in-app toggle (works for the portable build too), plus the installer option. |
| Session recording | Capture a live session to a .fts file for bug reports ("here's the exact stream that broke X"). |
| One installer | A small per-user installer, or a portable single .exe. No .NET runtime to install. |

## Supported games

The splitter works with any Forza game that has the "Data Out" telemetry feature. It detects which
game you're running automatically from the telemetry format and shows the name in the app, so there's
nothing to configure beyond pointing Data Out at the splitter.

| Game | Telemetry format | Live gear/speed readout |
|------|------------------|--------------------------|
| Forza Horizon 6 | Car Dash | Yes |
| Forza Horizon 5 | Car Dash | Yes |
| Forza Horizon 4 | Car Dash | Yes |
| Forza Motorsport (2023) | Dash | Yes |
| Forza Motorsport 7 | Dash | Yes |

Forwarding works for any of these regardless of format. The "Sled" telemetry format (used by some
motion-platform setups) is forwarded too, but it carries no dashboard fields, so there's no gear/speed
readout for it.

## Install

Recommended — the installer:

1. Download `ForzaTelemetrySplitterInstaller.exe` from the [Releases](../../releases) page.
2. Right-click it, choose Properties, tick Unblock at the bottom of the General tab, then OK. This
   avoids the "Windows protected your PC" screen. See [docs/SMARTSCREEN.md](docs/SMARTSCREEN.md) if you
   still see it.
3. Run it. The installer is per-user, so there's no Administrator prompt. It offers a desktop shortcut
   and an optional "Start automatically when Windows starts" checkbox.
4. It launches into the system tray when finished.

Advanced / no install: download `ftsPortable.exe` instead and run it directly. The installer above is
recommended for most people.

If you can't find the tray icon, Windows hides new ones by default. Click the small chevron (^) at the
bottom-right of the taskbar, then drag the icon onto the taskbar to keep it visible.

## In-game setup

The app starts splitting automatically; you only have to point Forza at it.

1. Open the app from the tray. It listens on port 44405 and is already set to forward to VirtualTCU on
   its normal port 5555.
2. In your Forza game, open Data Out (in Forza Horizon: Settings, then HUD and Gameplay, then Data
   Out; Forza Motorsport has the same setting under gameplay/HUD options):
   - Data Out: ON
   - IP Address: 127.0.0.1
   - Port: 44405
   - Packet Format: Car Dash (Horizon) or Dash (Motorsport)

The splitter detects which Forza game you're running automatically and shows its name in the app.
3. Leave your other tools as they are. The splitter forwards to each tool on the port it already uses,
   so there's nothing to reconfigure. To add another tool, click Add in the app, pick it from the
   preset list, and click OK.
4. Drive. When telemetry is flowing, the top-right pill turns green and every enabled tool receives the
   stream at the same time.

The splitter uses its own port (44405) so it never has to take a port another tool already owns. That
avoids the conflict you get if two apps try to listen on 5555. If you ever see a "port already in use"
message, change the splitter's port in the app and set Forza's Data Out port to match.

### Default ports

| What | IP | Port |
|------|----|----|
| Forza Data Out, into the splitter | 127.0.0.1 | 44405 |
| Forwarded to VirtualTCU (unchanged) | 127.0.0.1 | 5555 |
| Forwarded to your tuner (example, off by default) | 127.0.0.1 | 9999 |

## Supported tools

Any tool that reads Forza's live UDP telemetry. The splitter forwards to each on its own normal port,
so you don't change the tool.

| Tool | Its default port | Notes |
|------|------------------|-------|
| [VirtualTCU](https://github.com/Forza-Love/fh6-virtual_tcu) | 5555 | Auto-shifting. Unchanged — keep 5555. |
| [ForzaDash](https://github.com/himanshupapola/ForzaDash) | 1234 | Open-source FH6 telemetry dashboard. |
| [Forza-data-tools](https://github.com/richstokes/Forza-data-tools) | 9999 | Open-source CLI and browser dashboard. |
| [SIM Dashboard](https://www.stryder-it.de/simdashboard/) | 5685 | Phone or tablet dashboard. Use the device's IP. |
| [SimHub](https://www.simhubdash.com/) | 20777 | Dashboard and effects suite. |
| [co-driver](https://github.com/Ojansen/co-driver) | 5300 | MIT dyno and tune workbench. 5300 edges Forza's reserved 5200–5300 range. |
| [Tune It Yourself](https://www.tuneityourself.co.uk/) | over Wi-Fi | Live-telemetry auto-tuner (paid). Use the device's IP, not 127.0.0.1. |

Calculator tuners such as ForzaTune do not read telemetry, so the splitter does nothing for them.

## The overlay

A small pill auto-positions in the top-right of the primary screen. Green means valid Forza packets are
arriving and shows your current gear and speed; red means none are (you're in a menu, or Forza's Data
Out isn't pointed at the splitter). Speed shows in mph or kph (set in the app, defaulted from your
Windows region). Toggle the overlay from the tray menu. It never steals focus from the game.

Run Forza in Borderless or Windowed mode for the overlay to show over the game. True fullscreen can hide
any overlay, which is a Windows limitation rather than something specific to this app.

## Updating

There's no background auto-update. Use Check for updates in the tray menu to open the Releases page. If
there's a newer version, download the new installer and run it — it upgrades in place, keeps a single
entry in Add/Remove Programs, and preserves your settings.

## Recording a session

The "Record" button captures the live telemetry to a `.fts` file (a byte-exact copy of the packets,
any Forza game). It's useful for bug reports — attach the file and the exact stream can be inspected.
Recording writes only to the file you choose and is never uploaded. The file grows by a few MB per
minute, so stop it when you're done.

## Settings file

Settings live in `%APPDATA%\ForzaTelemetrySplitter\config.json` (listen port, destinations, overlay
on/off). Deleting it resets the app to defaults on next launch.

## More

- [Building from source](docs/BUILDING.md)
- [Windows SmartScreen warning](docs/SMARTSCREEN.md)
- [Reporting a bug](docs/REPORTING-BUGS.md)
- [Contributing](CONTRIBUTING.md)
- [License (MIT)](LICENSE)

## Tested on

Windows 10 and Windows 11. Forza Horizon 4/5/6 and Forza Motorsport (7, 2023) — auto-detected by
packet format.

The app interface is available in English, 日本語, Français, Deutsch, and Español, selected
automatically from your Windows language (changeable in the app).

Forza-Telemetry-Splitter

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