Prevent (via command line) a node from advertising topics

asked 2012-12-14 04:58:39 -0500

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updated 2012-12-14 04:58:55 -0500

I am wondering if it is possible to prevent an existing node from advertising/publishing on a number of unnecessary topics.

In particular, p2os publishes on the following topics:

/sonar
/pose
/gripper_state
/motor_state
/aio
/ptz_state
/tf
/battery_state
/dio

I only care about /pose and /sonar, is there any way to tell the node not to broadcast the other topics without rebuilding the node?

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answered 2012-12-14 05:09:32 -0500

dornhege

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No, not unless the node exposes parameters or something similar that allow to switch this.

The only thing you can do is redirect those topics to somewhere else, if they interfere with other publications on the same topic.

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answered 2012-12-14 05:07:02 -0500

thebyohazard
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I don't know of a way to prevent a node from advertising, but it says here in the wiki that a publish() in roscpp doesn't actually do anything if nothing is subscribed.

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There might still be an overhead to actually compute the message to be published. In that case it's the node's responsibility to prevent that (e.g. the openni_kinect driver doesn't compute pointclouds unless the topic is subscribed)

dornhege ( 2012-12-14 05:11:23 -0500 )edit

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Prevent (via command line) a node from advertising topics

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Prevent (via command line) a node from advertising topics