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No laser scan received (and thus no pose updates have been published) for 18.974000 seconds. Verify that data is being published on the /scan topic.

asked 2022-06-27 04:28:49 -0500

the_one gravatar image

Hi all, i already searched this question on all over answers.ros.org, but i didnt found answer on the issue i have. I built a custom 4 wheel bot and i added a navigation stack(map, move_base, amcl and other param yaml files) on it. if i run the launch file, i get this error,

[ WARN] [1656224367.752167333, 18.974000000]: No laser scan received (and thus no pose updates have been published) for 18.974000 seconds. Verify that data is being published on the /scan topic.

so, the issue i have is even if i see the map in rviz, there are no particle filters i can see detected by laser.Which describes the error i mentioned above. i clearly understand that my bot doesnt localize at first, leads to cant set a navigate and set a goal to my bot on the map.

I have been trying to solve this issue since last 3 days. Would be glad to have some guidance. Thanks in advance.

Regards.

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You'd better provide the result when executing roswtf, and the tf tree in rqt. It is easier for others to debug

tianb03 gravatar image tianb03  ( 2022-06-28 02:45:59 -0500 )edit

thank u for ur reply Sure, i attached a link of drive here, which has all the image files(error) in it...for your reference.

link text

i named those files with respect to the errors...

thanks in advance.

the_one gravatar image the_one  ( 2022-06-29 06:10:34 -0500 )edit

any output from the /scan topic using rostopic echo?

tianb03 gravatar image tianb03  ( 2022-07-02 04:11:50 -0500 )edit

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answered 2022-07-02 23:45:20 -0500

the_one gravatar image

Hi, after many consideration and references, i finally got cleared that issue. Fault is on me. I did the mistake on topic name. Its working now. After that i wanted to scan the map(turtlebot3 house) with my bot, but it ended up like this. Also if i run the launch file, the bot behaves like this. Idk why the bot behaves like. Thanks in advance.

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Asked: 2022-06-26 01:45:19 -0500

Seen: 341 times

Last updated: Jun 27 '22