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<DIV>Hi Ander,</DIV>
<DIV> </DIV>
<DIV>Have you checked ROS_IP or ROS_HOSTNAME in addition to ROS_MASTER_URI? I’ve
had similar problems when not setting these variables on my teleop
computer.</DIV>
<DIV> </DIV>
<DIV>Take a look here: <A
title=http://www.ros.org/wiki/ROS/EnvironmentVariables#ROS_IP.2BAC8-ROS_HOSTNAME
href="http://www.ros.org/wiki/ROS/EnvironmentVariables#ROS_IP.2BAC8-ROS_HOSTNAME">http://www.ros.org/wiki/ROS/EnvironmentVariables#ROS_IP.2BAC8-ROS_HOSTNAME</A></DIV>
<DIV> </DIV>
<DIV>Benoit</DIV>
<DIV> </DIV>
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<DIV> </DIV>
<DIV style="BACKGROUND: #f5f5f5">
<DIV style="font-color: black"><B>From:</B> <A title=aansuategui@tekniker.es
href="mailto:aansuategui@tekniker.es">Ander Ansuategui</A> </DIV>
<DIV><B>Sent:</B> Thursday, September 08, 2011 10:57 AM</DIV>
<DIV><B>To:</B> <A title=ros-users@code.ros.org
href="mailto:ros-users@code.ros.org">ros-users@code.ros.org</A> </DIV>
<DIV><B>Subject:</B> [ros-users] Strange problem running ROS across multiple
machines</DIV></DIV></DIV>
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<P class=MsoNormal><SPAN lang=EN-US>Hi,<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US>we are facing some strange problems
regarding communication between multiple machines. We are developing a
teleoperation package for our Segway RMP200 robot, which has a Kinect on top. We
run roscore, openni and the segway driver on the robot, and we can see all the
topics by using rostopic list command from a laptop. Moreover, we receive
the kinect image successfully in our teleoperation application running in the
laptop, and we also have a ros service running on the robot, which is called
also successfully.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US>The problem comes when we try to move the
robot by sending Twist messages to /cmd_vel topic. Apparently the messages don’t
reach the robot because when we run “rostopic echo /cmd_vel” command no data is
shown. But when running the same command in the laptop, the data is shown as
expected.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US>Following the tutorials, we have just
changed the laptop’s ROS_MASTER_URI var. We have tried ad-hoc wired and
wireless communication. We are surprised because most of the communication works
(kinect and service call for instance) but writing to topics doesn’t. Has anyone
experienced a similar behavior?<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US>We would be very grateful for any
help.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US>Regards.<o:p></o:p></SPAN></P>
<P class=MsoNormal>Ander<o:p></o:p></P></DIV><BR><FONT color=gray size=1
face=Arial>Mezu honen informazioa isilpekoa izan daiteke eta indarrean dagoen
legediak babesten du. Hutsegite baten ondorioz jaso baduzu, bidal iezaiozu
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