AdamS's profile - activity

@gvdhoorn once again you have some awesome insights and have helped me out. I think the best approach is to use somethin

How do you convert non-velodyne pcap file to bag file. I am working with a pcap file from a non-velodyne sensor. Is the

Distro info: I am using Melodic on Ubuntu 18.04

Network info - on the same subnet: 2 hosts (1 client, 1 server), 8 port switch, and a laptop to remote into each one, OS1-64 lidar sensor, and an ip camera.

I have a client node using a roscore server to act as the central point for the sensors. I can get topics and see messages to the client just fine and even render images and video from the client node however... here is my problem i hope i can get advice from.

I would like to be able to use rosbridge on the client node which is acting like an edge device however when i run it with the server/client configuration it is unable to receive certain messages and is not able to render the lidar point clouds but when I run this on server it has no issues.

Now i have two issues I observed so far that I need advice on, the first is ROS_HOSTNAME, rosbridge expects a hostname for the localhost(client) or it will throw an error like so:

RLException: Unable to contact my own server at [http://172.18.21.80:45109/]. This usually means that the network is not configured properly.

Second is when ROS_HOSTNAME is configured as localhost i get a warning message in /rosout. The non-local host is the server node.

[WARN][1596242809.777802944][/rosbridge_websocket]: attempted to connect to non-local host [172.18.21.80] from a node launched with ROS_HOSTNAME=localhost

and the following message in the webviz viewer im using:

This can happen e.g. when playing a bag from a different codebase. Message types could not be found for these topics: /os1_node/imu_packets /os1_node/lidar_packets

when running this on the server node these issues are no longer a problem and the topics render as expected. How can I run rosbridge on a client node? Is there a config or wiki page can reference? I have not found anything on this yet. Hoping someone can help shed some light.

I have already browsed the multimachine tutorial. however the second part here: if DNS does not work (or is not availab

I have already browsed the multimachine tutorial. however the second part here: if DNS does not work (or is not availab

the terminology i used is more illustrative to the configuration i setup. that question will help me clarify things. the

How do I run rosbridge on slave node? Distro info: I am using Melodic on Ubuntu 18.04 Network info - on the same subnet:

the terminology i used is more illustrative to the configuration i setup. that question will help me clarify things. the

How do I run rosbridge on slave node? Distro info: I am using Melodic on Ubuntu 18.04 Network info - on the same subnet:

the terminology i used is more illustrative to the configuration i setup. that question will help me clarify things. the

the terminology i used is more illustrative to the configuration i setup. that question will help me clarify things. the

the terminology i used is more illustrative to the configuration i setup. that question will help me clarify things. the

How do I run rosbridge on slave node? Distro info: I am using Melodic on Ubuntu 18.04 Network info - on the same subnet:

I am trying to visualize pcd files and have been following this thread here to do it however I am not able to find the perception_pcl command in the rosrun meta commands.

Am I missing something, the documentation for it does not give me much to go on http://wiki.ros.org/perception_pcl

I have already tried sudo apt-get install ros-melodic-perception-pcl but it still does not show up

thanks for the insight. I am rather new to working with LiDAR but jumping headfirst into the deepend of ROS is a lot to

@Delb that did it! Thank you!

@Delb pointed out that pcl-tools was required for me to use pcl_viewer. this was the missing component. How would I have

Hey Delb, they were not installed. Where would I have gone to find what needed to be installed? i am testing this now to

Sorry im not sure how much or how little information is required here. I assume by your reply that the package i install

Sorry im not sure how much or how little information is required here. I assume by your reply that the package i install

how do you install perception_pcl in melodic in ubuntu? I am trying to visualize pcd files and have been following this

how do you install perception_pcl in melodic in ubuntu? I am trying to visualize pcd files and have been following this

How do I install roscore for melodic on ubuntu 18.06? the docs are rather useless in regard to the installation packages for just about every tool that the tutorials are wanting me to work with. Can someone lend me a hand and share the apt-get install package name?

I am trying to run rosbag play but I can't get a master server setup for it to work without running roscore. I installed medlic-desktop-full and its not included which is honestly quite odd.

Please advise.

edit: here are the pages i am following: the commands as they appear in the following walkthroughs do not exist in my fresh install of melodic. http://wiki.ros.org/roscore http://wiki.ros.org/rosbag

Thank you, my issue was that i had pushed this to my bashrc but maybe i forgot to source my bashrc last night.

Do i need to source it every time? it was not always there. i am on two different machines. i can't copy and paste the t

Do i need to source it every time? it was not always there.

gvdhoom Yes i have sourced it. please see the attached picture Screenshot of output That seems to have done it

gvdhoom Yes i have sourced it. please see the attached picture Screenshot of output

Roscore is missing from my fresh melodic install How do I install roscore for melodic on ubuntu 18.06? the docs are rath

Here is my timeline: When i ran sudo apt-get install ros-melodic-desktop-full it did not install roscore. nor did it hav

Roscore is missing from my fresh melodic install How do I install roscore for melodic on ubuntu 18.06? the docs are rath