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Hello otomono10,

Can you get information (like a point cloud) from the zed mini? You can tested that with the zed Rviz launch files.

if you get information from the camera, I advise to check of the topic name which the my_node is subscribed to is correct. The topic names of the zed_wrapper can be found by running it in one terminal and running the following command in another terminal:

$ rostopic list

If you don't get information from camera, i advise to check if you installed all ZED packages correctly.