WARNING: ROS_MASTER_URI [http://192.168.0.109:11311] host is not set to this machine

electric_turtlebot

asked 2012-11-21 14:52:55 -0500

longzhixi123
58 ●21 ●22 ●29

updated 2018-07-12 21:43:33 -0500

jayess
6155 ●26 ●85 ●92

hello,i am trying to use turtlebot as website link text. when i have done link text. and i can check that TurtleBot laptop can get data from ROS node running on workstation. and the problem is when i run "roscore"in my workstation , i get

waring:WARNING: ROS_MASTER_URI [http://192.168.0.109:11311] host is not set to this machine.

and http://192.168.0.109 is my turtlebot ip.and my workstation ip is 192.168.0.103. when i run

$ rosrun turtlebot_dashboard turtlebot_dashboard&

my dashboard buttons remain all grey. what's matter ?thank s a lot

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answered 2012-11-21 22:01:09 -0500

Ben_S

2500 ●14 ●29 ●53

You can only have one roscore active (and configured) at a time. In case of the turtlebot the roscore should always run on the turtlebot itself to keep latencies and actual network usage low.

If you wanted to use a roscore on your workstation to work, while the turtlebot isn't running, you have to change your ROS_MASTER_URI to the name or IP of your workstation.

Dont forget to source the .bashrc again after the change, or restart your open consoles.

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answered 2012-11-21 15:30:12 -0500

Atom
458 ●9 ●19 ●28

updated 2012-11-21 21:50:29 -0500

Seems to me that you may have not properly set up your ROS network. I wrote a tutorial that might help you

http://www.instructables.com/id/Getting-Started-with-ROS-Robotic-Operating-Syste/?ALLSTEPS

But I would also look more closely at the ROS Wiki and double check your settings. If you check your bashrc with gedit "gedit ~/.bashrc" what do your ROS settings look like?

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WARNING: ROS_MASTER_URI [http://192.168.0.109:11311] host is not set to this machine

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