SimStrategist

Description

SimStrategist is a tool that displays and analyses live in-game telemetry from various racing simulators.

Compatible Simulators

Game(s)	Generation	Platforms
F1 2022, F1 2023, F1 2024	Gen 5	All
F1 2021	Gen 4	All
F1 2020	Gen 3
F1 2018, F1 2019	Gen 2	All
Le Mans Ultimate	-	PC
Forza Horizon 5	-	All
Forza Horizon 4	-	All

Features

• Live telemetry dashboard — gear, speed, RPM shift lights, DRS, engine temps, tyre temps
• Driver inputs panel — throttle, brake, clutch, and steering displayed in real time; toggle between bar view and scrolling graph view
• Lap times — current, last, best, sector 1, and sector 2 times
• Strategy co-pilot — AI-powered pit strategy recommendations using live tyre, fuel, and weather data
• Weather history — records track and air temperature samples throughout a session
• Telemetry recording & replay — capture a session to a .f1rec file and replay it later for development

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Usage

Connecting an F1 Game (2018 – 2024)

SimStrategist auto-detects the game version from each packet, so no manual version configuration is needed on the SimStrategist side. The steps below apply to all supported generations.

1. In the F1 game, go to Settings → Telemetry Settings.
2. Set UDP Telemetry to On.
3. Set UDP Broadcast Mode to Off.
4. Set UDP IP Address to the IP of the machine running SimStrategist:
   • Use 127.0.0.1 if running on the same PC.
   • Use the machine's local IP address if running SimStrategist on a separate device.
5. Set UDP Port to 20777.
6. Set UDP Send Rate to 20Hz (recommended).
7. Set UDP Format to match your game year — see the table below.
8. In the SimStrategist web app, use the game dropdown (top of the Telemetry or Strategy page) to select your game.
9. Start the telemetry listener:

python3 f1/server.py

The listener receives data on UDP port 20777. Make sure your firewall allows this port if the game runs on a different machine.

UDP Format setting by generation

Games	Generation	Set UDP Format to
Gen 5	F1 2022, F1 2023, F1 2024	Match the game year (e.g. 2024)
Gen 4	F1 2021	2021
Gen 3	F1 2020	2020
Gen 2	F1 2018, F1 2019	2019 or 2018

Newer games only: F1 2022–2024 include a UDP Format setting that lets you downgrade the output to an older spec. Always set it to match your actual game year — do not downgrade unless you have a specific reason to.

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Connecting Le Mans Ultimate

1. Download and install the Ultimate Telemetry Socket – JSON Telemetry Plugin from the Le Mans Ultimate community forums.
2. Place the plugin DLL in your LMU Plugins folder.
3. In the plugin configuration file, set the port to 5000 and the output host as below:
   • Use 127.0.0.1 as the output host if on the same PC
   • Find the IP address of the PC running it if you are using a seperate device
4. Start Le Mans Ultimate — the plugin will begin sending telemetry automatically.
5. Start the telemetry listener:

python3 lmu/server.py

The listener accepts connections on TCP port 5100 by default. To use UDP instead, run python3 lmu/server.py --udp. To change the port, add --port <number>.

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Connecting a Forza Horizon Game

SimStrategist detects FH4 vs FH5 automatically from the packet size — no manual version configuration is needed.

1. In the Forza Horizon game, go to Settings → Gameplay & HUD → UDP Race Telemetry.
2. Set Data Out to On.
3. Set Data Out IP Address to the IP of the machine running SimStrategist:
   • Use 127.0.0.1 if running on the same PC.
   • Use the machine's local IP address if running SimStrategist on a separate device.
4. Set Data Out IP Port to the default for your game:

Game	Default Port
Forza Horizon 5	20055
Forza Horizon 4	20044

1. In the SimStrategist web app, use the game dropdown to select your Forza Horizon title.

The listener starts automatically with python3 app.py on the default FH5 port (20055). If you are using FH4, or need a different port, set FORZA_HRZN_PORT=20044 before starting the app. Forza Horizon 3 has no UDP telemetry output and is not supported.

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Starting the Web App

python3 app.py

The app should be automatically opened in a new tab

External Code Used

Telemetry Data

• Parsing code for the F1 games taken from Harmitx7's F1-TELEMETRY-Dashboard at "github.com/Harmitx7/F1-TELEMETRY-DASHBOARD"
• JSON Module for LMU taken from the community forums at "community.lemansultimate.com/index.php?threads/telemetry-socket-%E2%80%93-json-telemetry-plugin.8229/"

About me

This is my first GitHub publication, so apologies for any badly-written code and/or unhelpful comments!

Claude AI module inside Visual Studio Code used.

Features in development

• F1 Race Countdown Timers
• F1 Race Replay (using FastF1)