Hi,
have a look at the network setup wiki page:
http://www.ros.org/wiki/ROS/NetworkSetup
Lorenz
> Hi Ander,
>
> 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.
>
> Take a look here: http://www.ros.org/wiki/ROS/EnvironmentVariables#ROS_IP.2BAC8-ROS_HOSTNAME
>
> Benoit
>
>
> From: Ander Ansuategui
> Sent: Thursday, September 08, 2011 10:57 AM
> To: ros-users@code.ros.org
> Subject: [ros-users] Strange problem running ROS across multiple machines
>
> Hi,
>
> 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.
>
> 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.
>
> 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?
>
> We would be very grateful for any help.
>
> Regards.
>
> Ander
>
>
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--
Lorenz M?senlechner | moesenle@in.tum.de
Technische Universit?t M?nchen | Karlstra?e 45
80335 M?nchen | Germany
http://ias.cs.tum.edu/ | Tel: +49 (89) 289-26910
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