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2014-01-28 17:31:07 -0500 | marked best answer | ROS installation failed Hi ! I am trying to install ROS on a laptop in order to get it working with the Turtlebot2. I tried to install kobuki's packages thanks to this tutorial : http://www.ros.org/wiki/kobuki/Tutorials/Installation ; but something seems to have failed. First, I couldn't do this step : The computer answered : And I might say that I am not really sure about what this step of the installation is for. Then, if I tried to launch any launch file or script, the computer answered that the package doesn't exist : Although I did follow all the previous step with success (except the udev one). As you suggested, I also tried http://www.ros.org/wiki/turtlebot/Tutorials/groovy/Installation I ran : and got this answer : But whenever I try to roslaunch a kobuki_package I still got the same error as above (and I need the auto_docking package). If I try to run a turtlebot's package, I got this error : I don't know what went wrong and any hint about how to fix the situation is welcome. |
2014-01-28 17:31:04 -0500 | marked best answer | Traveled Distance measurement Hi ! I would like to measure the total distance the Turtlebot traveled while navigating. So I was wondering if there was a way to get this information from the odometry sensors ? |
2014-01-28 17:30:59 -0500 | marked best answer | Unexpected navigation tf warning Sometimes, while launching the autonomous navigation the following warning occurs : and after that, I can't manage to get the navigation to work again. Most of the times, it does work fine. I don't understand why sometimes it doesn't. The manipulations I do is launching turtlebot_bringup minimal.launch and then launching the navigation's nodes thanks this launch file : I first thought it was because the nodes which update tf tree needed time to initialize... But I am not sure that is the reason. |
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2013-08-02 04:32:10 -0500 | commented question | installing ros on kubuntu It's just that I got notified every time you answered. :-/ And I can't unsubscribe. |
2013-08-02 04:21:19 -0500 | commented answer | how to set the turtlebot automaticaly find its location when placed on point in stored map Doesn't AMCL require an initial pose to work ? |
2013-08-02 04:18:56 -0500 | commented question | installing ros on kubuntu Question is one month old. I am not sure it is still relevant to keep answering. |
2013-08-02 03:56:03 -0500 | commented answer | How to fake the data of 2D laser scanner? I am sorry, but I can't help you more on this than what I have already answered. |
2013-08-02 03:38:01 -0500 | answered a question | How to fake the data of 2D laser scanner? There are some ROS packages dedicated to simulation, like Gazebo. I don't know if it is the kind of things you're looking for. I don't understand your latest question, what kind of informations are you exactly looking for ? Do you want informations to code your own driver for your laser ? If so, aren't these kind of informations provided by lasers' data-sheet ? Anyway, if you want to use only ROS independent tools, it is no longer a ROS problem and you might find it difficult to find some help here. :-/ PS : one of the solution to avoid to use an expensive laser sensor some people prefer to use a Kinect (there are even some ROS packages to transform kinect data to a kind of "laser" data) |
2013-08-02 03:22:54 -0500 | answered a question | ROS beginner_tutorials (17th tutorial) Error Is rospack package installed ? (check it out doing If it isn't installed try to do 'sudo apt-get install ros-fuerte-rospack' to install it. |
2013-07-31 21:52:19 -0500 | commented answer | How to install package from source in groovy? If you use the -DCMAKE_INSTALL_PREFIX, I think you will need to, but I am not sure. In the source installation tutorial I used (http://www.ros.org/wiki/turtlebot/Tutorials/groovy/Installation) they used make install in build folder. |
2013-07-31 21:40:18 -0500 | answered a question | How to install package from source in groovy? Are you sure this package has been catkinized ? If it has not, you'd better just use rosbuild. If it has been catkinized, you can just download it in your catkin workspace and do a catkin_make. This should work. If you want it to be in a specific directory, you can create a new workspace where you place this package, and use catkin_make -DCMAKE_INSTALL_PREFIX. |
2013-07-28 22:01:01 -0500 | answered a question | How to establish subscription/publication communication within C++ code? I am not sure, but it looks more like a C++ problem than a ROS specific one. I think you can write a C++ code for your machines which uses sockets to communicate the IP addresses you need and the setenv() function to change ROS_MASTER_URI and ROS_HOSTNAME the way you want to. |
2013-07-28 21:41:42 -0500 | answered a question | How to install ROS hydro beta? You can use the tutorial which has been written for the turtlebot : http://www.ros.org/wiki/turtlebot/Tutorials/hydro/Installation But if you don't want to install the turtlebot's package do not follow the turtlebot's specific steps (2.3 and 2.4) |
2013-07-25 23:32:04 -0500 | asked a question | logging submodule data in different files Hi ! I have written a node which uses a lot of ROS functions and used python's logging module to save log messages from this node. Thing is that not only I got the log messages I wanted, but also all the ones which are from the ROS functions I use. Is there a way to disable that ? |
2013-07-25 22:05:45 -0500 | commented question | Navigation not using Gmapping map, no obstacles appear What kind of sensor do you use to find obstacles ? Are you sure they're working well ? |
2013-07-25 21:59:46 -0500 | commented answer | CMake Error: CMAKE_MODULE_PATH does not contain Findcatkin.cmake Did you try rosmake tools as well ? Maybe this package has not been catkinised yet... |