'rosnode list' does not show the roscore in other computer.

connection

asked 2011-04-02 22:40:29 -0600

Hyon Lim
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I installed Ubuntu 10.04 on two different Virtual Box.

I set the network mode as Bridge, that retrieves IP address from my router (Apple Airport).

The machine #1 has 10.0.1.24 The machine #2 has 10.0.1.25.

I ran the roscore in machine #1. And 'rosnode list' on machine #2.

But I don't know why roscore of machine #1 does not show up in machine #2.

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Can you edit your question to explain exactly what you're seeing and what you expect the output to be. roscore is not itself a node and will not show up on rosnode list.

tfoote ( 2011-04-03 13:28:15 -0600 )edit

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answered 2011-04-03 08:48:15 -0600

fergs

13902 ●59 ●157 ●196 http://www.robotandchisel.com

updated 2011-04-03 08:48:52 -0600

You need to set ROS_MASTER_URI as Martin said, but you may also need to set ROS_HOSTNAME. See http://www.ros.org/wiki/ROS/Tutorials/MultipleMachines for a full tutorial.

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Thanks. Works well.

Hyon Lim ( 2011-04-03 18:33:12 -0600 )edit

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answered 2011-04-03 00:46:11 -0600

Martin Günther

11816 ●82 ●159 ●198 https://www.dfki.de/en...

First, ensure that port 11311 on machine #1 is reachable from machine #2. Then, you have to set the environment variable ROS_MASTER_URI appropriately. In your setup, run the following commands in a terminal on machine #2:

export ROS_MASTER_URI=http://10.0.1.24:11311
rosnode list

The first line has to be executed in each terminal that is supposed to connect to the master on machine #1. Alternatively, you can add it to your ~/.bashrc file (assuming your shell is Bash), and close and re-open all running terminals.