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.

Synchronization of 2 or more nodes?

asked 2012-07-12 10:39:48 -0500

abdullah
81 ●12 ●14 ●20

updated 2012-07-13 06:23:22 -0500

Hi,

Is it possible that we can start all nodes in launch file without any delay. Because In my case I am running 3 robots. I am starting nodes for these robots in a launch file. Here I have a problem that every time when I start these nodes, robots do not start moving at once.

Can anyone please guide me that how I can start nodes at the same time?

Thanks

edit retag flag offensive close merge delete

add a comment

1 Answer

Sort by » oldest newest most voted

answered 2012-07-13 07:37:27 -0500

Dan Lazewatsky
9115 ●79 ●103 ●160 http://dan.lazewatsky.com/

roslaunch does not provide any guarantees about timing or ordering. If you need to do synchronization of your nodes, you will probably have to add synchronization code to the nodes themselves.

edit flag offensive delete link

Comments

It is not really a matter of roslaunch not providing this, it is just plainly impossible to achieve a perfect synchronization between three independent processes with the kind of scheduler we have on a standard Linux ;)

Thomas ( 2012-07-13 09:07:22 -0500 )edit

add a comment

Question Tools

Stats

Asked: 2012-07-12 10:39:48 -0500

Seen: 909 times

Last updated: Jul 13 '12

Synchronization of 2 or more nodes? edit

1 Answer

Comments

Question Tools

Stats

Related questions

Synchronization of 2 or more nodes?