Can a node publish different types on one topic?

Question

I am new to ROS and just started studying. I am stuck with using custom message types. I would like to know is it possible to publish two different data type to single topic? Or do we need to publish separately?

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Originally posted by Edu on ROS Answers with karma: 11 on 2017-01-05

Post score: 1

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Original comments

Comment by Akhilesh on 2017-01-05:
Hi, you can publish even more than two data types but it depends on what you want to send.

Comment by dinesh on 2017-01-05:
their is no need to publish two types of msgs from single topic, just make another publisher its easy, any number of msgs u can publish, but from single topic i'm hearing first time.

Comment by Akhilesh on 2017-01-06:
if you advertise a topic like node.advertise("camera_info", 1); , so in CameraInfo class, there is more than one data types are available like uint32, string etc.

Comment by Kenn on 2017-07-17:
HI, did you find a solution?

Comment by Akhilesh on 2017-07-18:
Can you specify what exactly you want to publish? Or add some piece of code to understand the need.

Answer 1

No, you have to publish it separately. Why would you want to publish in the same topic? If you explain what you are trying to accomplish, maybe we can propose a solution.

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Originally posted by Procópio with karma: 4402 on 2017-01-05

This answer was ACCEPTED on the original site

Post score: 5

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Original comments

Comment by Edu on 2017-01-05:
Thank you !!! :)

Comment by Kenn on 2017-07-17:
Hi, I am trying to accomplish something similar, can you take a look at my question? Thanks.