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The ROS Master_API might be your friend. Please also look at #q260633, which covers parts of your question.

The ROS Master_API might will probably be your friend. Please also look at #q260633, which covers parts of your question.

With getPublishedTopics you can create a list of all available topics. Then use getTopicTypes to create the subscribers accordingly.

The ROS Master_API will probably be your friend. Please also look at #q260633, which covers parts of your question.

With getPublishedTopics you can create a list of all available topics. Then use getTopicTypes to create the subscribers accordingly.

You might find a good code example for subscribers to unknown topic types in the source code of rostopic echo.