Sep 15, 2022 · Also, it does seem a little risky to destroy a node from within the node, but I don't really know. Asked by Morris on 2022-09-15 12:43:11 UTC I am also using ROS Foxy but in Ubuntu 20.04 LTS.

Nov 27, 2020 · "my_node" is the "ROS driver" for a device (a node that writes command to / reads data from a port where the device is connected to). Our system has a set of different devices, each one having its own ROS driver; in order to implement some sort of "plug & play" mechanism, the ROS driver of each device publishes at the start-up an identifier ...

Sep 17, 2020 · I have a Ros node running in a server with gpu which takes input as image on /rgb/image topic, process image and gives output as String on /obstacle topic. Now if I send an image as an input to server using flask, the image in the server is getting converted to ROS image and processing happens where i get obstacle direction as a response to the ...

May 5, 2020 · P.S. if you put "cannot launch node of type" into the search bar at the top of this page, including the double quotes, you will see greater than 2 dozen questions like your own. Asked by Mike Scheutzow on 2021-09-06 12:43:38 UTC

I'm able to get the info about a node using rosnode.get_node_info_description(node_name), but this returns one gigantic string. The name of the topics is in the string, but it isn't easy to pull the topic names out (like it would be if the topic names were in a list).

Nov 15, 2019 · How to port a node to nodelet as easy as possible? I have a problem where I am having to compare PointCloud2 where all my clouds are currently coming from a nodelet. As I understand nodelets pass data around with addresses rather than chewing memory and so for a structure such as many clouds, passing this data around nodelets in the same ...

Nov 8, 2018 · I would recommend to read the NodeHandles wiki and the Names in ros.. If your first node define a nodehandle with a private namespace then if you want to have the same namespace in your second node you would have to define the nodehandle with the fully qualified name of the first one :

$ ROS_NAMESPACE=stereo ros2 run stereo_image_proc disparity_node NB : the stereoimageproc node seems to have disappeared, so I try with disparitynode (and with pointcloudnode), the only two nodes available. I also tried by removing "ROSNAMESPACE=stereo". When I then run rostopic list again, I get (limited to relevant topics) :

The value of the ROS_HOSTNAME environment variable, 127.0.1.1, will be used to set the advertised address for the ROS node. Warning: The IP address 127.0.1.1 in the "NodeHost" setting is not associated with any network interface. It is possible that MATLAB cannot be reached by other ROS nodes.

Hello ROS community, I am facing an issue with a custom ROS node I have developed that can launch other nodes using a string command. I can successfully publish a string containing the launch command to start a node, but I am having trouble killing the nodes once they are launched.