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2022-06-15 23:19:57 -0500 commented question ROS2 through docker: failed to configure logging: Failed to create log directory

It was probably an ownership problem. I had the same error, it was fixed after giving my user the ownership of his home

2022-04-04 02:47:38 -0500 commented question What does "set(node_plugins ...)" actually do?

I'm wondering the exact same thing! Any updates about this?

2022-02-13 21:23:47 -0500 commented answer [ROS2] extend env vars in launch file instead of overwriting

I thought SetEnvironmentVariable is part of the EnvironmentVariable module but it has to be imported as follows: from l

2021-04-23 15:26:25 -0500 received badge  Nice Answer (source)
2021-02-26 03:33:19 -0500 commented question Hokuyo not publishing in Gazebo

Hi, Do you have any errors/warnings when running the simulation? I think your URDF is not well formed.

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2020-06-19 19:15:54 -0500 commented answer Sending multiple Goals to robot by cpp code

Hi, can you be more precise or share your progress so we can help you better?

2019-11-13 10:41:19 -0500 commented question Problem with ROS control and Gazebo.

@MichaelDUEE You're welcome! Happy it worked.

2019-11-07 03:01:14 -0500 commented question Could not find messages

Do you mean geometry_msgs/Pose?

2019-11-07 01:44:27 -0500 commented question Problem with ROS control and Gazebo.

That helps! The joint will never move with a velocity="0". You need to set non zero effort and velocity values, try some

2019-11-07 01:42:37 -0500 commented question Problem with ROS control and Gazebo.

That helps! The joint will never move with a velocity="0". You need to set non zero effort and velocity values, try some

2019-11-06 16:06:30 -0500 commented question Could not find messages

It would be helpful if you post your humansArray.msg file.

2019-11-06 16:03:29 -0500 commented question Could not find messages

Did you forget to specify generate_messages(DEPENDENCIES ...)? If your custom message depends on other ROS messages (li

2019-11-06 16:03:09 -0500 commented question Could not find messages

Did you forget to specify generate_messages(DEPENDENCIES ...)? If your custom message depends on other ROS messages (li

2019-11-06 16:02:51 -0500 commented question Could not find messages

Did you forget to specify generate_messages(DEPENDENCIES ...)? If your custom message depends on other ROS messages (li

2019-11-06 15:43:50 -0500 commented question Problem with ROS control and Gazebo.

Could you post your urdf or at least the joint definition part?

2019-11-06 13:07:35 -0500 commented question Problem with ROS control and Gazebo.

Are there any warnings or errors when running your simulation? Is Gazebo loading your controllers correctly, is it publi

2019-10-11 09:29:33 -0500 commented question Having trouble with the depth image to laserscan converstion

It didn't work because I forgot to set info_msg.distortion_model. The error disappears when setting it as well as the in

2019-10-10 09:44:51 -0500 commented question Having trouble with the depth image to laserscan converstion

Hi! Any updates on this? I managed to publish a non-empty distortion matrix from the gazebo plugin but it didn't solve t

2019-09-10 08:00:11 -0500 commented answer Easy Access to robot poses created using the MoveIt! Setup Assistant

Perfect! thank you @gvdhoorn .

2019-09-10 05:06:36 -0500 commented answer Easy Access to robot poses created using the MoveIt! Setup Assistant

Is there a way to do the same thing with Python?

2019-08-02 05:50:27 -0500 commented answer Laser filters limit scan angle opposite way and hector mapping limit of scan range

I tried this configuration instead, scan_filter_chain: - name: laser_cutoff type: laser_filters/LaserScanAngularBoun

2019-08-02 05:41:44 -0500 commented answer Laser filters limit scan angle opposite way and hector mapping limit of scan range

Hi, I'm using an RPLIDAR A2 and I have the same need but the solution didn't work for me. Each filter is working alone b

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2019-07-25 15:56:40 -0500 commented question husky SLAM demo produces bad map

Thank you for your feedback @Youssef_Lah , I was doubting the gazebo_ros_control plugin as well because I encountered th

2019-07-23 06:08:07 -0500 commented question husky SLAM demo produces bad map

It works perfectly with ROS kinetic, but I have the same problem with ROS melodic packages, the map is a big mess. Did y

2019-07-23 05:57:49 -0500 commented question husky SLAM demo produces bad map

It works perfectly with ROS kinetic, but I have the same problem with ROS melodic packages, did you ever solve this? any

2019-05-28 11:29:19 -0500 commented question rostopic pub: "required argument is not a float" while sending Float32MultiArray.

Could you precise what does your (x, y) variables stand for? If they are velocities, we could come up with a more natura

2019-05-28 11:25:17 -0500 answered a question rostopic pub: "required argument is not a float" while sending Float32MultiArray.

The following command will publish your data and give you access to your two parameters. rostopic pub /cmd std_msgs/Fl

2019-05-25 03:04:36 -0500 commented question Error when trying to use CvBridge

Did you solve this? posting your hole node or at least the part where you are setting the image variable will be of much

2019-05-25 03:03:11 -0500 answered a question Error when trying to use CvBridge

I think that the problem is in the image variable, the error message says that it is of type "Subscriber". cvbridge take

2019-05-20 01:55:36 -0500 marked best answer rosrun vs roslaunch to run a single node, any difference?

Hi everyone!

Well, in my understanding launch files are meant to launch a node or so many nodes at a time and allow setting parameters dynamically , remapping and making sure that nodes don't stop if respawn is set to True and so many other stuff. I was wondering what is the difference between:

 <?xml version="1.0"?>
    <launch>
      <node name="my_node" pkg="my_package" type="my_node"/>
    </launch>

and

roscore&     
rosrun my_package my_node

There shouldn't be any difference ?!

In my case, when using rosrun, my node was crashing every 30 min and no ros logs where generated but when using roslaunch instead, it didn't crash for hours and the log files where saved successfully.

Is it just a coincidence!? or does the roslaunch command run nodes in a more coherent way?

I would be pleased if you could explain this to me...

Thanks!


Edit 1

In response to john.j.oneill 's comment

Basically I'm running the node from a bash script, start_my_node.sh and I do use the & after the rosrun command, my script is as follows:

#!/bin/bash
#ROS exportations 
#ROS source 
roscore&  
sleep 1
rosrun my_package my_node&

So it is not about having a lot of text in the output?

Is using a similar script a good way to start ros nodes?

2019-03-23 15:18:52 -0500 commented question How to change subscribed topics of depth_image_proc/point_cloud_xyz node??

Do you mean that the depth_image_proc/point_cloud_xyzrgb node is subscribed to the topics mentioned above but receiving

2019-03-23 15:17:54 -0500 commented question How to change subscribed topics of depth_image_proc/point_cloud_xyz node??

Do you mean that the depth_image_proc/point_cloud_xyzrgb is subscribed to the topics mentioned above but receiving nothi

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2019-03-07 07:10:57 -0500 commented answer Is it possible to convert .avi file into rosbag file in ROS_KINETIC_KAME

rosrun image_view image_view image:=/camera/image_raw and rosbag play your_bag.bag

2019-03-07 05:27:45 -0500 commented answer Is it possible to convert .avi file into rosbag file in ROS_KINETIC_KAME

great! you can use rosbag record for that as mentioned in my answer.

2019-03-07 05:21:17 -0500 commented answer Is it possible to convert .avi file into rosbag file in ROS_KINETIC_KAME

Sorry I've just seen your answer containing the output messages. don't add them as answer you can edit your question to

2019-03-07 05:05:54 -0500 commented answer Is it possible to convert .avi file into rosbag file in ROS_KINETIC_KAME

This is not an error, it means that everything is working fine :). Can you tell me if you are able to visualize your vid

2019-03-07 05:04:13 -0500 commented answer Is it possible to convert .avi file into rosbag file in ROS_KINETIC_KAME

This is not an error, it means that everything is working fine :). Can you tell me if you are able to visualize your vid

2019-03-07 04:51:38 -0500 commented answer Is it possible to convert .avi file into rosbag file in ROS_KINETIC_KAME

what kind of error, can you post it here?

2019-03-07 04:49:00 -0500 commented answer Is it possible to convert .avi file into rosbag file in ROS_KINETIC_KAME

what kind of error, can you post it her?

2019-03-07 04:26:40 -0500 commented answer Is it possible to convert .avi file into rosbag file in ROS_KINETIC_KAME

It should run roscore automatically... Maybe, I'm not sure in this case. Did it work only when having a running roscore?

2019-03-07 03:56:34 -0500 commented answer Is it possible to convert .avi file into rosbag file in ROS_KINETIC_KAME

Check the path to your video file again, I think that the user name is missing, it should be something like /home/user_

2019-03-07 03:02:51 -0500 edited answer Is it possible to convert .avi file into rosbag file in ROS_KINETIC_KAME

I've used video_stream_opencv once with ROS indigo, Installed it with sudo apt-get install ros-indigo-video-stream-open

2019-03-07 02:39:19 -0500 commented question Is it possible to convert .avi file into rosbag file in ROS_KINETIC_KAME

did you use sudo apt-get install ros-kinetic-video-stream-opencv to install the package or install it from source?

2019-03-07 02:36:14 -0500 commented question Is it possible to convert .avi file into rosbag file in ROS_KINETIC_KAME

I've posted an answer for your first question that should work once the package is installed correctly. Can you please s