topic_tools
- Software
- Middleware
- Tool
A ROS 2 package of composable nodes for redirecting, throttling, dropping, multiplexing, transforming and delaying ROS 2 topics at a meta level, without serializing the data.
Made by ROS 2 Tooling Working Groups.
Source on GitHub: github.com/ros-tooling/topic_tools (opens in a new tab). Facts read at commit 1205546 (opens in a new tab).
Licenses
- Code
- Apache-2.0 (opens in a new tab)
Read by Robotheca from LICENSE (opens in a new tab) (Apache-2.0) at commit 1205546 (opens in a new tab), on 16 Oct 2026.
- Commercial use
- Yes
What it does
- Relay subscribes to a topic and republishes it to another topic, working with any message type.
- RelayField republishes one or more fields of a message into a different message type.
- Transform converts a topic or one of its fields into another topic and type using a Python expression.
- Throttle limits republishing either by message rate or by bandwidth in bytes per second over a time window.
- Drop forwards only some messages, dropping X out of every Y, mainly to save bandwidth on wireless links.
- Mux switches one output among N input topics, and Demux sends one input to one of N outputs, both with services to switch selection.
Written by Robotheca from the project's README (opens in a new tab) at commit 1205546.
Getting started
- Difficulty
- Intermediate
- How to start
- The project's README (opens in a new tab)
Maintenance
- Status
- Maintained: a commit in the last 12 months
- Newest commit
- 21 Jun 2026 on rolling
- Latest release
- None published on GitHub
Checked on GitHub on 16 Oct 2026.
Links
Robots on Robotheca that use it
No robot on Robotheca is linked to it yet. Links come from a robot's robot.yaml, from its dependency files read as text, or from Robotheca's editors.
Robotheca lists software as a reference: nothing is hosted or run here, and every fact links to where it was read.