content of a node's publications

asked 2014-09-24 00:44:06 -0600

flag of United Kingdom of Great Britain and Northern Ireland

3339 ●96 ●138 ●161 https://github.com/mehditlili

updated 2014-09-24 00:52:16 -0600

I am playing around with the navigation stack and turtlebot and trying to debug the errors I get. Especially the topic /tf where many nodes are publishing transformations. How to know from which node is which transformation? Is there something like rostopic echo that allows to echo nodes coming from a preselected node?

When I run rosrun tf tf_monitor all I get is :

Frame: pole_middle_3_link published by unknown_publisher Average Delay: -0.5 Max Delay: 0

for all published transforms.

edit retag flag offensive close merge delete

Comments

I remember that there's somewhere the information about the publisher in the message, but don't remember the exact name or position of it. This has been asked a several time here. All answers said that this information should only be used to debug. I don't think rostopic can do that.

BennyRe ( 2014-09-24 01:19:11 -0600 )edit

any suggestion about keywords to search about old questions?

Mehdi. ( 2014-09-24 02:34:07 -0600 )edit

add a comment

2

answered 2014-09-24 03:01:02 -0600

BennyRe
2949 ●16 ●30 ●54

Found the link: http://wiki.ros.org/rospy/Overview/Pu...

You have to write your own little node that prints the publishers.

Please note the comment on this site:

We do not recommend using callerid information beyond debugging purposes, as it can lead to brittle code in an anonymous publish/subscribe architecture.