Problem with turtlebot computers setup

asked 2013-03-09 12:00:25 -0600

SaiHV
275 ●21 ●23 ●30

updated 2014-04-20 14:09:25 -0600

ngrennan
1 ●1 ●1

Hello,

I am encountering problems when trying to set up the computers for running a turtlebot. Here is the setup info:

Turtlebot netbook - Electric - 192.168.1.3 (tbot) Workstation - Groovy - 192.168.1.2 (work)

ROS_MASTER_URI : "http://192 . 168 . 1 . 3:11311" ROS_IP : "192 . 168 . 1 . 3"

(set on both computers)

I can ssh into tbot from work and viceversa. I can ping both machines from each other. netcat listening works fine. But using "rostopic list" on the workstation gives out "Unable to communicate with master!" error.

Also, according to the tutorials, if I use "rostopic echo /diagnostics" on the netbook, it should report a warning saying that "diagnostics has not been published", but in this case, it just prints some diagnostic info saying that dev/ttyUSB0 is not connected.

roscore is indeed running on 192.168.1.3:11311, but the workstation is unable to find it. Looking forward to your suggestions. Thanks in advance.

edit retag flag offensive close merge delete

Comments

The master is usually port 11311, are you sure yours is 11611?

Jon Stephan ( 2013-03-09 13:52:48 -0600 )edit

Sorry, that was a typo. I typed this from Windows. Corrected.

SaiHV ( 2013-03-09 13:54:51 -0600 )edit

Does Windows not support "3" any more? :-D

bit-pirate ( 2013-03-14 15:11:18 -0600 )edit

No, I meant I forgot what the port was as I was in Windows and couldn't run roscore to check.

SaiHV ( 2013-03-14 15:19:20 -0600 )edit

add a comment

0

answered 2013-03-14 15:15:45 -0600

SaiHV
275 ●21 ●23 ●30

Hello,

As I mentioned, I did a clean install of linux on the turtlebot and installed ROS Groovy and the turtlebot apps, and the setup started working. Thanks for your comments.

edit flag offensive delete link

Comments

congratulations

Chik ( 2013-03-14 15:32:08 -0600 )edit

add a comment

0

answered 2013-03-09 14:04:55 -0600

Jon Stephan

837 ●16 ●17 ●30 https://sites.google.c...

I have my system set up with names instead of IP addresses. My /etc/hosts files have the IP addresses of both machines in both files. Then I just set ROS_MASTER_URI=http://hostname:11311, and not ROS_IP.

I think if you're using ROS_IP, each machine needs it set to it's own IP. (Did you set both machines' ROS_IP to the master's IP?)

edit flag offensive delete link

Comments

Ah. I set both of them to the turtlebot netbook's IP. So if I use ROS_HOSTNAMEs instad; the ROS_HOSTNAME of the workstation would just be the workstation's name?

SaiHV ( 2013-03-09 17:31:27 -0600 )edit

I think if you have the /etc/hosts set up on both machines, then you don't need to set ROS_HOSTNAME.

Jon Stephan ( 2013-03-10 13:54:49 -0600 )edit

No amount of tweaking the ROS_HOSTNAME / ROS_IP in the machines gave any results, unfortunately. Thanks for the suggestions though.

SaiHV ( 2013-03-12 16:56:54 -0600 )edit

add a comment

0

answered 2013-03-10 20:02:48 -0600

Chik

229 ●24 ●29 ●42

My suggestion would be simply reboot your workstation and turtlebot laptop and then check

echo $ROS_MASTER_URI

echo $ROS_HOSTNAME

to see if they are correct or not. In my case I need to set the IP (echo export...) 3 times and reboot 3 times before it works. Sometimes the computer suddenly reset them to localhost without reason...

Another issue may be Electric in laptop but Groovy in Workstation. In my case I installed Electric in both.

edit flag offensive delete link

Comments

Rebooted multiple times, no luck. Switched to 10.04 and installed electric on the workstation, still nothing. Now as a last resort, I am just doing a clean install on the netbook and installing groovy on both to see if that will resolve anything. Thanks for the tips.

SaiHV ( 2013-03-12 17:00:21 -0600 )edit

Sorry to hear that. Perhaps you should contact the distributor (Clearpath?)

Chik ( 2013-03-13 14:51:20 -0600 )edit

add a comment

Problem with turtlebot computers setup

Comments

3 Answers

Comments

Comments

Comments

Question Tools

Stats

Related questions

Problem with turtlebot computers setup edit

Comments

3 Answers

Comments

Comments

Comments

Question Tools

Stats

Related questions

Problem with turtlebot computers setup