Timers & hardware

Plug it in.

How dd-pits connects to your timer and to every screen, speaker and goggle, and what you need to run it.

How it works

One source of truth.
Every screen, speaker and goggle.

RotorHazard plugin

Racing on RotorHazard? It's all here too.

Install dd-pits as a RotorHazard plugin and the timer itself runs everything: the phone dashboard with up-next heats and the leaderboard, the TV view, every OBS overlay, race calls, commentary and goggle OSD. No laptop needed beside it.

1 · Upload the plugin

On RotorHazard 4.3 or later, open Settings → Plugins, upload the zip and restart. On 4.0 to 4.2, copy the dd_pits folder into src/server/plugins.

2 · Start it once online

The plugin downloads the right dd-pits for your Pi (32- or 64-bit), checks it against the release checksums, and keeps it running. After that, no internet is needed.

3 · Share the dashboard

Pilots open http://<timer>:8088. RotorHazard's Settings → dd-pits panel links to the dashboard, the overlays and dd-pits' settings, behind your RotorHazard login.

Download the RotorHazard plugin Read the guide

Works with RotorHazard 4.0 and later. Heats, rounds, classes, laps and results come straight from the timer; the next heats show as "up next" with their lineups and channels.

Works with ELRS Netpack

One Ethernet cable.
Every goggle on the field.

ELRS Netpack is firmware for Ethernet ESP32 boards that acts as the ELRS timer backpack over the network. dd-pits talks to it over TCP — and it tells you whether each message actually reached the goggles.

An ESP32 Ethernet board running ELRS Netpack firmware in a black case with a cable plugged in

BoardsWaveshare ESP32-S3-ETH · Olimex ESP32-POE-ISO

Power over EthernetOn a PoE board, one cable powers and connects it

Timer backpack over TCPdd-pits connects to elrs-netpack.local:8080

Delivery confirmationKnow which goggles got the message

Over-the-air updatesDrop new firmware on http://elrs-netpack.local/

Goggle test consoleOSD message, channel change, clock and DVR name — built in

The ELRS Netpack firmware console showing version, build date and a firmware drop zone — Firmware console — over-the-air updates

The ELRS Netpack goggle test console with OSD, channel change, clock and DVR controls — Goggle test console

ELRS Netpack was originally created by i-am-grub, and forked and extended by bob9. Not affiliated with the ExpressLRS project.

ELRS Netpack on GitHub

Running it

No internet.
No account. No drama.

Everything runs on the venue laptop. Settings live in one JSON file beside the app — copy it to another laptop and the whole setup moves with it.

A laptop on a picnic table in a remote field at twilight

Browser setup

Everything is configured at /setup, with a guided first run and help at /setup/help.

Debug page

The log in the browser at /setup/debug, with API keys removed, plus a downloadable report to send when something goes wrong.

Meeting editor

On FPVTrackside (alpha), change the meeting from any browser: event rules and channels, rounds, races, line-ups and pilots. Name races your way and dd-pits shows those names everywhere.

JSON API

Meeting, race, round, leaderboard, pilot and channel data at /docs — with an OpenAPI spec and a live event stream for your own displays.

What you need

Probably what you already have.

A laptopOne app for macOS, Windows and Linux, beside FPVTrackside. On RotorHazard, the plugin runs on the timer itself.

Local AIApple Silicon for on-device voice and commentary.

Cloud AIOr a Gemini or Qwen API key on any hardware.

ELRS backpackOptional — a netpack or USB backpack for goggle OSD.

See it all working together.

Watch it in action Setup guide Download dd-pits