roscpp and latched topics

Question

Hi there, I have the following problem.

One of my node just parses a file and stream reference trajectories as Path/Markers topics. These trajectories are almost never updated. Therefore I would like to use latched topics to avoid updating for nothing.

Therefore I have the following setup:

1. parse data, create publishers with latching enabled
2. publish once in each topic
3. spin forever

...and if I use rostopic to retrieve the topics data, nothing comes from the node.

Am I missing something?

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Originally posted by Thomas on ROS Answers with karma: 4478 on 2012-02-13

Post score: 0

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Original comments

Comment by Eric Perko on 2012-02-13:
Could you include your code? (or at least a minimum example that has this issue)

Comment by Thomas on 2012-02-13:
Sorry, it was an error on my side. For the record, here is what I did to switch "normal" topics to latched topics: https://github.com/laas/humanoid_walk/commit/5d02d0e81c1d49c21b6061133865462673ea6762

Answer 1

You might want to try the simpler version of the advertise API You might be having trouble with not setting the other callbacks which you don't appear to use.

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Originally posted by tfoote with karma: 58457 on 2012-02-24

This answer was ACCEPTED on the original site

Post score: 1