Questions tagged [tutorial]

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ROS Tutorial - Nothing happens when running "Writing an action server and client (C++)

I think I've followed the instructions for this ROS Tutorial and have the following files plus config file changes: ...
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Modify the overlay tutorial issue

Link: https://docs.ros.org/en/iron/Tutorials/Beginner-Client-Libraries/Creating-A-Workspace/Creating-A-Workspace.html#modify-the-overlay I was going through the tutorial and it asked me to modify the ...
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Data on real-time threads

I'd like to see a tutorial or baseline document covering optimization in Node. I learned that priority tasks or background tasks are performed depending on importance. Can you tell me where I can find ...
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Errors with colcon using ros2 tutorial

I've installed ROS2 iron and am following the tutorial [here]https://docs.ros.org/en/iron/Tutorials/Beginner-Client-Libraries/Colcon-Tutorial.html. I have followed the steps up to and including "...
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How to check if the specified NAV2 behavior tree is running correctly?

I am following the navigation2_dynamic_point_following tutorial on ROS 2 Humble. I have executed successfully all the part, but I can not understand if the follow_point bt is running... To launch the ...
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Question about Serial communication of Vex V5 brain

I'm currently developing serial communication for the Vex V5 brain. In the process, I came across the solution you provided on GitHub, which can be found here: https://github.com/ros-drivers/rosserial/...
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ROS Tutorial issue

I've been learning about ROS using this url ⇒(http://wiki.ros.org/ROS/Tutorials). And doing so I have a issue with this chapter ⇒(http://wiki.ros.org/ROS/Tutorials/reading%20msgs%20from%20a%20bag%...
森圭汰's user avatar
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ROS1 dependency in nav2 tutorial?

I'm trying to discover Nav2 stack. I'd like to do a mission/follow-waypoint thing in my own simulation. I started with the "Getting Started" -> "Running the Example" after ...
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#Windows# Issue with tf2_ros::MessageFilter Tutorial on Windows

I am a beginner with ROS 2 and I was following the Using stamped datatypes with tf2_ros::MessageFilter tutorial on a Windows machine. I have encountered an issue in the 3 Run section. When I run ...
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#Win10/Iron Cannot get message of "INFO custom_minimal_param_node: Hello earth!" after using the launch file

guys! I am learning about 《Using parameters in a class (Python) — ROS 2 Documentation: Iron documentation》. For the section of [3.2 Change via a launch file], after running the ...
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colcon build freeze a Raspberry Pi

Thanks all for reading and helping. I'm attempting to install and use Humble on a fresh 22.04 install on a Raspberry Pi reTerminal (CM4) with 4G RAM. Ubuntu 22.04.1 LTS (GNU/Linux 5.15.0-1015-raspi ...
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Adding Tutorial link automatically to a wiki page

Hi, I've created a tutorial for the ros_canopen package : http://wiki.ros.org/ros_canopen. I made the tutorial according to this guideline : http://wiki.ros.org/WritingTutorials. The tutorial page is ...
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Teensy tutorial not working

Hi! I'm having problems with the Teensy tutorial. I've already worked through the linux tutorial with no problems. Everything builds and loads properly, but when I start the ros2 serial agent, it ...
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ros2 topic echo is not visible as node named _ros2cli_<id>

Hi, I was following https://docs.ros.org/en/galactic/Tutorials/Topics/Understanding-ROS2-Topics.html . I called command (I can see msg in terminal, so subscription is working): ...
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How to print out multiple responses from service

Hello, I'm currently trying to create a service which can send multiple responses. I edited the tutorial service ( http://wiki.ros.org/ROS/Tutorials/WritingServiceClient%28python%29 ) to: ...
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Unknown CMake command "add_rostest"

I am following the tutorial on overlaying on catkin workspaces and run catkin as $ catkin_make -DPYTHON_EXECUTABLE=/usr/bin/python3 but I get ...
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rosout symbol lookup error

HI all, I am introducing to ROS and I am trying to follow the beginner tutorials. I've got an error when launching roscore: ...
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UsingRosEd beginner tutorial defaults to Spanish?

Hello, It appears that the beginner tutorial for ROS Editors found at the following link has been changed to Spanish. http://wiki.ros.org/ROS/Tutorials/UsingRosEd Where can I find an English version ...
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ros1_bridge does not support sensor_msgs/msg/Image

Hi, I wanted to transport sensors_msgs/msg/Image from a ros2(eloquent) node to a ros1(melodic) node so I did the following steps in this exact same order Installed melodic from debian packages based ...
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1 answer
60 views

ros2 interface command dosen't work

Hello, I'm fairly new to ros so I might be missing something obvious. During the ros2 tutorial I need to type the command 'ros2 interface', you can see in the image below that I get an error message ...
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Turtlebot3 blob recognition

Hello everyone! Is something here who knows a site where can I learn about blob recognition for turtlebot3? Or for robots which uses Compressed images data type? I ...
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Create Dockerfile for ros2 package : ament_cmake error

Hello, I try to use docker to develop ros2 packages. In this context, I use the minimal_publisher package from https://github.com/ros2/examples as example which has the structure: ...
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Flexbe unabel to reache action_server

I'currently trying to work with Flexbe and trying to include an action but I keep getting the following error: ...
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1 answer
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MoveIt Tutorial - All Links at the same place!

Hello ROS-Community, I am currently working my way through the MoveIt-GettingStarted Tutorial (https://ros-planning.github.io/moveit_tutorials/doc/getting_started/getting_started.html). I do have ...
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How naming work in ros?

In tutorial Using rqt_console and roslaunch, the two turtlesim node are named as "sim" in the launch file. But inside the mimic block, they are referred as "turtle1". The name tag ...
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What are the minimum requirements for releasing a package into the ROS distro for the first time

I am editing the question to more accurately reflect what I am trying to understand. I want to know what what the minimum requirements are for a package to be eligible for being incorporated into the ...
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Innok Heros simulation with ROS Kinetic and Gazebo

Hi, does everyone know, how to simulate the Innok Heros with ROS Kinetic. The tutorial is just for Indigo. http://wiki.ros.org/innok_heros_gazebo/Tutorials/Simulating%20Innok%20Heros What are the ...
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sensor_msgs - Can't build tutorial project

I am trying to pass images as messages in a simple ROS project. I'm a complete beginner in ROS and robotics. The tutorial I'm trying to follow is here: http://wiki.ros.org/cv_bridge/Tutorials/...
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Beginner Tutorial Procedure

If possible I'd like for experienced users to post their suggestions whether this is the correct way, and explain the commands commented as 'black magic' please. Putting together the initial bit: 1. ...
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Talker Listener Tutorial. Listener no show

Hi, I feel more confident with CMake and linux after spending time practising. So I tried again, these steps: http://wiki.ros.org/catkin/Tutorials/create_a_workspace http://wiki.ros.org/catkin/...
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rosmsg tutoral error

I was working through the tutorials on rosmsg and encountered this error. I went back and followed the instructions on the previous tutorials, but cannot seem to find the problem. At the end it says ...
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2 answers
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rviz doesn't show any shape

Hi all, I'm trying to build my first URDF model, following this tutorial: http://wiki.ros.org/urdf/Tutorials/Building%20a%20Visual%20Robot%20Model%20with%20URDF%20from%20Scratch Booth replicating what'...
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The many origins of URDF

There are a lot of origins in URDF, making them bit confusing for me. Before I decided to ask this question, I've done research on the forum and wiki post, including these posts: URDF and frames of ...
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1 answer
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" $ rospack depends beginner_tutorials" error

Straight dump of console output: ...
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1 answer
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Understanding xmlns: what are the links linked to?

I have read similar question here ,but It still hasn't answered my confusions. I refer to this tutorial here's the snipper: ...
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1 answer
4 views

MoveIt Tutorial rviz does not start

Hi guys, I try to move the robot Sawyer from rethinkrobotics to a given point. My base program for this is here. Because it doesn't work well just typing in coordinates I want to try to simulate the ...
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1 answer
8 views

Unable to show messages

I've seen similar questions, but they do not solve my problem. http://answers.ros.org/question/187071/cannot-load-message-class-for-are-your-messages-built/ I am using Ubuntu 12.04 and ROS Indigo. If ...
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1 answer
28 views

rosrun tf2_tools not found

In the very first tutorial of tf2, we run the command rosrun tf2_tools view_frames.py. I tried this on two different systems running Ubuntu 16.04 and ROS kinetic. ...
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Transport Image tutorial issue: subscriber doesn't show image

Hello everyone, I tried to do the tutorial " Running the Simple Image Publisher and Subscriber with Different Transports " image_transport/Tutorials but I encountered an issue. When I run ...
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1 answer
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The result of Dynamic_reconfigure tutorial not update

I have studied dynamic reconfigure to use it with my project. I had followed the tutorial until http://wiki.ros.org/dynamic_reconfigure/Tutorials/UsingTheDynamicReconfigurePythonClient. However, after ...
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how to create a the launch file xml

i follow the tutorials to 2.3 The launch file .the tutorials just tell us to :"Now let's create a launch file called turtlemimic.launch and paste the following: "but it doesn't tell us how ...
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dynamic_reconfigure tutorial problems

Hi everyone i am stilll new here so please assist me. So i have been trying to make a gui to change the modes(manual, teleoperation) of an vehicle from a control station. I initially tried to do qt ...
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Offline version of tutorial

Would it be possible to have an offline version of the tutorial? The website is really slow thesedays. A local version of http://wiki.ros.org/ or at least of http://wiki.ros.org/ROS/Tutorials Thanks ...
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package not found - ROS PCL Tutorial

Hey, I am new to ROS and want to work with pointclouds. I did exactly the ROS PCL tutorial as written in http://wiki.ros.org/pcl/Tutorials CMakeLists in ~/catkin_ws/src/my_pcl_tutorial: ...
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1 answer
9 views

Getting started with robots from ROS wiki

Hello, I´m trying to start a project simulating a robot from robots wiki but I´m not exactly sure how to program these robots. I followed some tutorials but they all used a launch file from demo ...
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1 answer
47 views

[MoveIt!] How to Use the Python Move Group Interface

Hi, I want to use MoveIt! for pathfinding for a simple manipulator arm. The MoveIt! Setup Assistant and Rviz Integration tutorials were very helpful for the first usage of MoveIt! with the manipulator ...
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Impossible to make a plugin with the tutorial

Hi, I am following the 'Writing and Using a Simple Plugin' tutorial (here) but I can't compile my code. I am on Ubuntu 14.04 and I use ROS indigo. I use C++. When I use catkin_make the terminal ...
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[PCL_tutorial] No tf data.Fixed Frame camera_depth_frame does not exist

I followed this tutorial 4.1 (http://wiki.ros.org/pcl/Tutorials) and ran these with kinect v2 $ rosrun my_pcl_tutorial example input:=/narrow_stereo_textured/points2 $ rosrun rviz rviz After that I ...
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beginner: creating existing package

Hello, I want to modify hector_slam. So, for a rearrangeable hector_slam I think i should create and build or install hector_slam in catkin_ws right? I looked the tutorials and got confused so much. I ...
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Tutorials-Markers: Do not overwrite last marker

I try to have mulitple markers via several publishes and then let them fade away if their lifetime is over. Unfortune if I publish a new marker the old marker disappears before its lifetime is up. I ...
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