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2017-10-04 02:06:48 -0500	answered a question	roslaunch XML "if" comparison This is supported as of ROS Kintec. <group if="$(arg foo)"> <!-- stuff that will only be evaluated if foo is
2017-10-04 02:05:28 -0500	answered a question	If statement in launch file This is supported as of ROS Kinetic. <group if="$(arg foo)"> <!-- stuff that will only be evaluated if foo i
2017-10-04 02:03:44 -0500	answered a question	roslaunch if condition This is supported as of ROS Kinetic. <group if="$(arg foo)"> <!-- stuff that will only be evaluated if foo i
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2017-04-05 02:35:36 -0500	answered a question	Held broken packages ROS-Indigo install on Ubuntu 14.04.5 Make sure you have `main` enabled in your Ubuntu repositories.
2016-08-24 07:53:34 -0500	commented question	rostopic echo gets no data but node does yes. Either I have it in my .bashrc or I source it every time I open a new terminal.
2016-08-24 07:20:58 -0500	asked a question	rostopic echo gets no data but node does This is how my setup looks like desktop computer odroid xu4 (arm computer) I tried running the master on both computers and I export the the ROS_IP and ROS_MASTER_URI like that: oroid: export ROS_IP=odroid_IP and export ROS_MASTER_URI=http://desktop_IP:11311 desktop: export ROS_IP=desktop_IP and export ROS_MASTER_URI=http://desktop_IP:11311 I publish image data from the odroid and I get the data on the desktop. I process the image data on the desktop computer and publish a std_msg::Float32 (lets call the topic "duration") message with a time stamp. So good so far... Now here's the problem: When I try plotting the "duration" topic with rqt or try rostopic echo "duration", I don't get any data. But when I write a small python script and subscribe to the topic "duration" and print the data on the console, it works just fine... It also works if I run everything on the desktop computer (camera attached to the desktop) and run rqt or rostopic echo. Any help would be appreciated Thanks!