How to analyse the control and flow of data in a ROS node ?

I want to analyse as to how control and data transfer takes place to and from a particluar node. I want to know which are the external nodes trying to communicate with this particular node and how does this interaction take place. P.S:- I am quite beginner in ROS and have just started learning it.

Asked by mayank_m on 2015-12-31 09:50:50 UTC

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Answers

rqt_graph displays this kind of information

http://wiki.ros.org/rqt_graph

http://wiki.ros.org/ROS/Tutorials/UnderstandingTopics#Using_rqt_graph

Asked by nickw on 2015-12-31 11:33:14 UTC

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Besides using rqt_graph, as suggeste by @nickw, you can also use the rosnode info command:

rosnode info /node_name

Asked by Procópio on 2016-01-04 04:34:27 UTC