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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 :

roscd kobuki_ftdi 
make udev

The computer answered :

make: *** No rule to make target `udev'.  Stop.

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,

roslaunch kobuki_node minimal.launch

the computer answered that the package doesn't exist :

[kobuki_node] is not a package or launch file name

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 :

. /opt/ros/groovy/setup.bash
rosrun kobuki_ftdi create_udev_rules

and got this answer :

This script copies a udev rule to /etc to facilitate bringing
up the kobuki usb connection as /dev/kobuki.

[sudo] password for turtlebot: 

Restarting udev

udev stop/waiting
udev start/running, process 4208

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,

roslaunch turtlebot_bringup minimal.launch

I got this error :

WARNING: unable to configure logging. No log files will be generated
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
WARNING: disk usage in log directory [/home/turtlebot/.ros/log] is over 1GB.
It's recommended that you use the 'rosclean' command.

Cannot locate [roslaunch]Invalid <param> tag: Cannot load command parameter [rosversion]: command [rosversion roslaunch] returned with code [1]. 

Param xml is <param command="rosversion roslaunch" name="rosversion"/>

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 :

[ WARN] [1372337372.793829100]: Waiting on transform from /base_footprint to /map to becomeavailable before running costmap, tf error:

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 :

<launch>
  <include file = "$(find turtlebot_bringup)/launch/3dsensor.lau
nch">
    <arg name = "depth_processing" value = "false" />
  </include>
  <!--Map server-->
  <node name = "map_server" pkg = "map_server" type = "map_serve
r" args = "/maps/my_map.yaml"/>
  <include file = "$(find turtlebot_navigation)/launch/includes/
_amcl.launch">
    <arg name = "initial_pose_x" value = "16.6"/>
    <arg name = "initial_pose_y" value = "34.55"/>
    <arg name = "initial_pose_a" value = "1.59"/>
  </include>
  <include file = "$(find turtlebot_navigation)/launch/includes/
_move_base.launch"/>

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.

2013-12-17 20:42:38 -0500 received badge  Famous Question (source)
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 roscd rospack, if you have an error message, it is not installed)

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...