OpenDDS simulator

Discover topics, upload IDL, publish samples, and run DDS scenarios.

Layang ODDS brings the main DDS workflow into one desktop app: scan topics from the network, subscribe with DDS Listener or Dynamic mode, publish JSON samples, stream scenario arrays, and tune QoS per topic.

Download release Set OpenDDS env Open README

Latest release · OpenDDS environment setup · Source access by request

Download

Download the latest Layang ODDS release.

Get release notes and available artifacts from GitHub Releases. If an RPM package is attached, install it with sudo dnf install ./layang-odds-*.rpm.

Latest Release Install Notes

OpenDDS Environment

Configure OpenDDS from an env file.

Use ~/.config/layang-odds/env for normal user setup, or /etc/layang-odds/layang-odds.env for system-wide setup. Restart the app after editing the env file.

User config System-wide config No manual export DDS Runtime Build check

# Option 1: user config
mkdir -p ~/.config/layang-odds
nano ~/.config/layang-odds/env

# Option 2: system-wide config
sudo mkdir -p /etc/layang-odds
sudo nano /etc/layang-odds/layang-odds.env

OPENDDS_ROOT=/opt/OpenDDS-3.29.1
LAYANG_ODDS_DDS_CONFIG=$HOME/.config/layang-odds/rtps.ini

The packaged app launcher reads env files automatically on startup.

Workflow

Built for day-to-day DDS simulation and verification.

The page focuses on the current ODDS workflow: discovery, subscription, publishing, IDL upload, scenarios, and QoS.

01 Discover

Scan DDS topics from the network and open them as topic tabs.

02 Subscribe

Use DDS Listener or Dynamic mode and inspect latest samples, raw data, events, and runtime logs.

03 Publish

Edit JSON payloads, publish once, or run a continuous stream from a scenario.

04 Configure

Upload IDL, map DDS types, and tune topic QoS before testing the wire flow.

Publish and subscribe

Scan DDS topics and work with live samples.

The Discovery panel lets operators scan topics from the network, select a topic, choose DDS Listener or Dynamic mode, publish JSON samples, start or stop streams, and watch the latest response in the same screen.

Network topic scan DDS Listener mode Dynamic mode Latest response viewer

IDL workspace

Upload IDL and create DDS topic mappings.

Imported IDL files stay visible in the workspace. ODDS lists the discovered DDS topic types, keeps the original source readable, and lets operators create topic tabs from those types.

Add IDL file Browse imported IDL Inspect source text Create topic from type

Layang ODDS IDL upload and mapping screenshot — ID files and discovered DDS topic types are managed from the IDL panel.

Scenario stream

Build scenarios with ordered JSON arrays and loops.

Scenario definitions can hold a sequence of DDS payloads. The stream runner publishes each sample in order and can loop the array continuously for repeatable simulations.

New or imported scenario Ordered sample array Loop publishing Interval control

Layang ODDS scenario stream array loop screenshot — Scenario stream editor with JSON sequence array and running status.

QoS editor

Fine-tune QoS per topic before testing.

The QoS tab exposes the active profile for a topic, including reliability, durability, history, depth, deadline, liveliness, lease duration, lifespan, partition, and ownership settings.

Reliability and durability History and depth Deadline and latency Save or reset profile

Layang ODDS QoS editor screenshot — Per-topic QoS editor with active profile summary and reset/default actions.

Support

Need help or want to collaborate?

Report issues, request features, discuss collaboration, or ask for source access.

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