Is there a possibility in ROS to check that the other machine messages publish in the topic without direct transfer of messages between the machines?

Question

Hi,

Is there a possibility in ROS to check that in the other machine messages publish in the topic without direct transfer of messages between the machines?

I would like to transfer between machines only the information that the message was published in topic without transferring the exact things in it.

I tried to use the «Message Event», but according to traffic of the router, the messages were transmitted completely.

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Originally posted by baltic on ROS Answers with karma: 35 on 2018-01-29

Post score: 0

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Original comments

Comment by gvdhoorn on 2018-01-29:
Do you need an event per message, or are aggregate statistics enough?

Comment by baltic on 2018-02-04:
Statistics is enough, but if it possible to receive an event per message, it would be better.

Answer 1

If you want statistics on topic rate for monitoring and alerting, you may want to set up the ROS diagnostics framework and use the DiagnosedPublisher class from the diagnostic_updater package.

If you want to monitor aggregate statistics on the entire topic graph and you don't need monitoring or alerting, you may want to enable topic_statistics and use rqt_graph to measure the publish rate: http://wiki.ros.org/rqt_graph#Topic_statistics (note that this only works for topics that are actually published and subscribed, because it's per-link and not per-publisher)

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Originally posted by ahendrix with karma: 47576 on 2018-01-29

This answer was ACCEPTED on the original site

Post score: 0

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Original comments

Comment by baltic on 2018-02-04:
Thanks, ros statistics is what I wanted