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I'm having trouble with the same issue. The rostopic command doesn't seem to work. I think there may be a bug in rostopic (or at least a behavior that I don't understand).

Here's my setup: - Android device publishing to /turtlebot_node/cmd_vel - keyboard_teleop publishing to /cmd_vel - "rostopic echo" on both /cmd_vel and turtlebot_node/cmd_vel

When I run "rosrun topic_tools relay /cmd_vel /turtlebot_node/cmd_vel" I see an info message "[INFO] [time] advertised as /turtlebot_node/cmd_vel" and commands from the keyboard_teleop are relayed correctly relayed to the /turtlebot_node/cmd_vel topic

However, when I run "rosrun topic_tools relay /turtlebot_node/cmd_vel /cmd_vel" I don't see an info message and no messages are relayed.

So... it looks like topic_tools will only relay in one direction (the wrong one) and the command mentioned earlier doesn't work. I'm aware of the changes in the source code, but I'll like to take the chance to learn more about ROS and report a possible bug. Any ideas what's going on?

Thanks, -Brian

I'm having trouble with the same issue. The rostopic command doesn't seem to work. I think there may be a bug in rostopic (or at least a behavior that I don't understand).

Here's my setup: - setup:

• Android device publishing to /turtlebot_node/cmd_vel - /turtlebot_node/cmd_vel
• keyboard_teleop publishing to /cmd_vel - /cmd_vel
• "rostopic echo" on both /cmd_vel and turtlebot_node/cmd_vel

When I run "rosrun rosrun topic_tools relay /cmd_vel /turtlebot_node/cmd_vel" /turtlebot_node/cmd_vel I see an info message "[INFO] [time] advertised as /turtlebot_node/cmd_vel" and commands from the keyboard_teleop are relayed correctly relayed to the /turtlebot_node/cmd_vel topic

However, when I run "rosrun rosrun topic_tools relay /turtlebot_node/cmd_vel /cmd_vel" /cmd_vel I don't see an info message and no messages are relayed.

So... it looks like topic_tools will only relay in one direction (the wrong one) and the command mentioned earlier doesn't work. I'm aware of the changes in the source code, but I'll like to take the chance to learn more about ROS and report a possible bug. Any ideas what's going on?

Thanks, Thanks,

-Brian