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wtf is forzadataout?

ldalvik/forzadataout — explained in plain English

Analysis updated 2026-05-18

0CAudience · vibe coderComplexity · 3/5Setup · hard

TL;DR

An ESP32 library that receives live telemetry, like speed and engine RPM, from Forza Horizon 4/5/6 so you can build custom gauges or drive a real instrument cluster from the game.

Mindmap

mindmap
  root((ForzaDataOut))
    What it does
      Reads Forza UDP telemetry
      Speed and RPM data
      Vehicle make model decoder
    Tech stack
      C
      ESP32
    Use cases
      Custom gauges
      Junkyard instrument cluster
    Audience
      Hobbyist makers
      Racing game fans

Code map

Detail Auto

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filefunction / class

Why would anyone build with this?

REASON 1

Build a custom physical gauge, like a speedometer or RPM dial, that reacts live to Forza Horizon gameplay.

REASON 2

Wire a real junkyard instrument cluster to display live data streamed from the game.

REASON 3

Decode Forza's numeric vehicle codes into the actual car make, model, and year in your own hardware project.

What's in the stack?

CESP32

How it stacks up

ldalvik/forzadataoutac000/find-flvacc4github/kdenlive-omnifade
Stars00
LanguageCCC
Last pushed2013-04-05
MaintenanceDormant
Setup difficultyhardmoderatemoderate
Complexity3/52/52/5
Audiencevibe coderdevelopergeneral

Figures from each repo's GitHub metadata at analysis time.

How do you spin it up?

Difficulty · hard Time to first run · 1h+

Requires ESP32 hardware and wiring knowledge, no setup instructions given in the README.

The README does not state a license, so terms of use are unclear.

Wtf does this do

ForzaDataOut is a library written for the ESP32, a small and inexpensive microcontroller board, that lets it read live telemetry data streamed out of the racing video games Forza Horizon 4, 5, and 6. Forza has a built in feature called UDP Data Out, which broadcasts information about what is happening in the race over the network in real time, and this library is what lets an ESP32 pick that data up and use it. The data includes things like your car's current speed, engine RPM, and other vehicle details. It also includes a decoder that can translate one of 582 numeric codes into the actual make, model, and year of the car you are driving in game, so your hardware project can know exactly what vehicle is on track without you having to look it up yourself. The README describes two example uses. One is building your own custom gauges, for instance a physical speedometer or RPM dial that reacts live to what is happening in the game. The other is more unusual: taking a real, physical instrument cluster salvaged from a junkyard car and wiring it up to display live data from the game, so the dashboard behaves as if it were sitting in the actual vehicle. The README is short and does not go into installation steps, wiring diagrams, or example code, so anyone picking this up should expect to explore the source files directly to understand exact usage and required hardware connections. Given the small size of the project, it seems best suited to a hobbyist already comfortable soldering and programming an ESP32, rather than someone looking for a fully guided, beginner friendly starting point.

Yoink these prompts

Prompt 1
Explain how Forza's UDP Data Out telemetry feature works and what data fields it sends.
Prompt 2
Help me wire an ESP32 to receive Forza Horizon telemetry using this library.
Prompt 3
Write example code that uses this library to light up an LED when engine RPM crosses a threshold.
Prompt 4
How do I use the 582 ordinal decoder in this library to identify the car make and model?

Frequently asked questions

wtf is forzadataout?

An ESP32 library that receives live telemetry, like speed and engine RPM, from Forza Horizon 4/5/6 so you can build custom gauges or drive a real instrument cluster from the game.

What language is forzadataout written in?

Mainly C. The stack also includes C, ESP32.

What license does forzadataout use?

The README does not state a license, so terms of use are unclear.

How hard is forzadataout to set up?

Setup difficulty is rated hard, with roughly 1h+ to a first successful run.

Who is forzadataout for?

Mainly vibe coder.

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