ROS Resources: Documentation | Support | Discussion Forum | Index | Service Status | ros @ Robotics Stack Exchange

Attention: Answers.ros.org is deprecated as of August the 11th, 2023. Please visit robotics.stackexchange.com to ask a new question. This site will remain online in read-only mode during the transition and into the foreseeable future. Selected questions and answers have been migrated, and redirects have been put in place to direct users to the corresponding questions on Robotics Stack Exchange. Additional details are available here.

0

Topic/msg inspection tool.

topics

asked 2016-02-29 12:52:11 -0600

BSBingham
108 ●4 ●8 ●13

All,

I am coming to ROS as an LCM user. One of the LCM tools that I found very useful was lcm-spy ( http://lcm.googlecode.com/svn/www/man... ). The tool provided a complete high-level view of all published messages and the ability to drill down at examine the content of individual messages.

I have tried to replicate this functionality with various command-line options to rostopic without any luck. My suspicion is that this tool exists.

Thank you, Briani

edit retag flag offensive close merge delete

1 Answer

Sort by » oldest newest most voted

0

answered 2016-02-29 16:04:35 -0600

gvdhoorn
86574 ●283 ●1432 ●1054 http://cor.tudelft.nl/

updated 2016-02-29 16:06:44 -0600

From the man page you link:

lcm-spy collects the following statistics for each channel:

Channel name

This would be topic I guess in ROS: rostopic list / rosservice list (although those are not channels). If you want a GUI tool: rqt_graph.

Number of messages received

This is a bit trickier, and would need some bash scripting to keep a running total. Perhaps another member can suggest a suitable one-liner.

Message Rate (Hz)

rostopic hz /topic_name

Bandwidth (KB/s)

rostopic bw /topic_name

See also wiki/rostopic.

Note that these statistics are all relative to the start of a rostopic invocation.

You might also be interested in wiki/Topics - Topic statistics and rqt_graphprofiler.

Edit:

[..] and examine the content of individual messages.

That would be rostopic echo /topic_name. Be aware that this can result in a lot of data for high-frequency / high-volume topics.

edit flag offensive delete link

Comments

Thank you for the recommendations. It turns out what I was looking for was/is rqt_topic. The other tools are useful.

Thank you!

BSBingham ( 2016-03-16 00:03:48 -0600 )edit

Question Tools

Stats

Asked: 2016-02-29 12:52:11 -0600

Seen: 469 times

Last updated: Feb 29 '16

Related questions

ROS Answers is licensed under Creative Commons Attribution 3.0 Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.

Powered by Askbot version 0.10.2