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error unable communicate with master

asked 2019-03-12 13:29:34 -0600

gautier gravatar image

updated 2019-03-13 09:08:50 -0600

gvdhoorn gravatar image


I'm trying to setup a workstation to work with a Turtlebot.

I've followed the tutorial here :

Robot IP is : Workstation IP is

In .bashrc I set up ROS_MASTER_URI in both bashrc at this value : Both Hostname are set up with the IP of the machine

I can ping in both ways.

Roscore is launched on the robot and rostopic return "/rosout" and "/rosout_agg" But still when I launch "rostopic list" on the workstation, it doesn't work and returns "Unable to connect with master"

Has someone any leads that we could follow please?

Thank you :D

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Have you set the IP of the workstation as ROS id? If workstation isn't properly identified, roscore can't connect it to the topic.

"export ROS_IP=" in the bashrc file on the workstation?

billy gravatar image billy  ( 2019-03-12 18:46:55 -0600 )edit

hello, thanks for your answer but the bashrc file already have "export ROS_IP=" have you other ideas ?

gautier gravatar image gautier  ( 2019-03-13 08:36:41 -0600 )edit

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answered 2019-03-13 08:56:07 -0600

gautier gravatar image

got it !! it was the firewall of the machine link to the robot thanks for your help anyway

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Asked: 2019-03-12 13:29:34 -0600

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Last updated: Mar 13 '19