ROS Resources: Documentation | Support | Discussion Forum | Index | Service Status | ros @ Robotics Stack Exchange

Attention: Answers.ros.org is deprecated as of August the 11th, 2023. Please visit robotics.stackexchange.com to ask a new question. This site will remain online in read-only mode during the transition and into the foreseeable future. Selected questions and answers have been migrated, and redirects have been put in place to direct users to the corresponding questions on Robotics Stack Exchange. Additional details are available here.

0

when i am going to run "rostopic echo /cmd_vel" command i get following warning.

cmd_vel

asked 2013-08-16 23:30:29 -0600

pavanpatel
61 ●9 ●11 ●12

WARNING: topic [/cmd_vel] does not appear to be published yet

plz tell me how can i solve this warning....

edit retag flag offensive close merge delete

3 Answers

Sort by » oldest newest most voted

5

answered 2013-08-17 02:16:11 -0600

flag of Netherlands

2563 ●35 ●45 ●60

That means that the node publishing to that topic is probably not running. Try rostopic list

(and follow the tutorials)

edit flag offensive delete link

0

answered 2013-08-17 04:54:49 -0600

mozcelikors
181 ●15 ●16 ●25

updated 2013-08-17 04:55:08 -0600

I agree with davinci.

Although I'm not sure, please try these:

rostopic echo /gazebo/cmd_vel
rostopic echo /gz/cmd_vel
rostopic echo cmd_vel

If you provide which robot you are trying to drive, we could help you more.

edit flag offensive delete link

0

answered 2013-08-18 20:00:19 -0600

pavanpatel
61 ●9 ●11 ●12

Actually i am trying to get communication between ros and labview using labview ros- toolkit.And for that i am using that command.

edit flag offensive delete link

Question Tools

1 follower

Stats

Asked: 2013-08-16 23:30:29 -0600

Seen: 8,400 times

Last updated: Aug 18 '13

Related questions

ROS Answers is licensed under Creative Commons Attribution 3.0 Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.

Powered by Askbot version 0.10.2