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.

Subscribing to a message type regardless of the topic name

asked 2017-04-28 14:52:46 -0600

Andre Volk

775 ●11 ●17 ●30 https://github.com/volkandre

updated 2017-04-28 14:58:54 -0600

Is there a way to subscribe to all messages of a given type without knowing their topic names? It would be perfect, if the callback function could additionally see the related topic name.

My application: I would like to write a node, which is supposed to do some administrative work and therefor collects all sensor_msgs/CameraInfo messages from every camera on my robot. But I don't know how many cameras my robot has.

This question comes close to what I need, but I'd still have to maintain a list of all my cameras separately. Any ideas?

edit retag flag offensive close merge delete

add a comment

1 Answer

Sort by » oldest newest most voted

answered 2017-04-28 15:19:42 -0600

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

You could probably use the Master API to get a list of all publishers for a particular message type (getTopicTypes(..)). Then iterate over that and subscribe to the topics that you're interested in.

edit flag offensive delete link

Comments

Thanks for the hint. That looks good.

Andre Volk ( 2017-05-01 09:52:36 -0600 )edit

add a comment

Question Tools

1 follower

Stats

Asked: 2017-04-28 14:52:46 -0600

Seen: 408 times

Last updated: Apr 28 '17

Subscribing to a message type regardless of the topic name edit

1 Answer

Comments

Question Tools

Stats

Related questions

Subscribing to a message type regardless of the topic name