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topic [/talker] does not appear to be published yet

I try to run the following code on ROS Kinetic ...
Encipher's user avatar
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0 answers
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spawn turtle at specific location in turtlesim

I am trying to spawn turtle bot at specific location using launch file. I am able to spawn robot successfully at default location using: ...
Pratham's user avatar
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Simulating Navigation Behaviors for a Quadruped Robot Using a Simpler Robot Model (TurtleBot) in Gazebo and RViz

I am working on a project in ros2 humble involving a real-life quadruped robot (wavego with lidar), and I am exploring the feasibility of initially simulating navigation behaviors using a simpler ...
Arnau Crespo's user avatar
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1 answer
123 views

Multi-robots control in ROS2 Humble

I am trying to spawn two robots with the goal of controlling them independently. I have made changes to the empty world launch file in turtlebot3_gazebo package to try and spawn two robots, for now I ...
tyraex's user avatar
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Seeking Advice on Quantitative Evaluation Metrics for 3D Environment Generation?

I am currently engaged in a research project in the field of robotics, focusing on the development and evaluation of photorealistic 3D virtual environments for robot manipulation and navigation. Our ...
assa's user avatar
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What Quantitative Evaluation Methods Should Be Used for Robotics Simulation Research by ros2?

I am part of a research team working on robotics, and we're currently exploring the creation and evaluation of photorealistic 3D virtual environments for robot manipulation and navigation tasks. Our ...
assa's user avatar
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38 views

When launching world and robot models, initial attempts succeed, but subsequent launches fail

The first one or two launches of this launch file work without issues, but subsequent launches fail. I am generating two robots in a world, specifically a ridgeback and a turtlebot3 waffle. I suspect (...
就走吧's user avatar
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1 answer
69 views

Using Publishers and Subscribers in Python for ROS with TurtleBot

I've been exploring ROS with Python and TurtleBot recently, and I'm currently working on a project that involves utilizing both publishers and subscribers within the same Python file. I've managed to ...
Evan Heinz's user avatar
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6 views

Teleopt a Turtlebot 3 and controling arduino compatible LED-Matrix at the same time

for a Uni Project I'm currently using a turtlebot 3 and through ROS noetic controlling its speed and angle via a Phyton controller. I want to control as well an Arduino compatible LED Matrix that I ...
Daniel's user avatar
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1 vote
0 answers
105 views

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 ...
Cristian_wp's user avatar
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64 views

multi-turtlebot4 causes the simulation to crash in gazebo ignition

I am trying to simulate multiple turtlebot4 on Gazebo Fortress using ROS2 humble on my Ubuntu 22.04 but when I tried to run these commands, each in alone terminal: ...
abdo Salm's user avatar
  • 113
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[ERROR]: Visual: [/turtlebot4_1/standard_dock] already exists

I am using ROS2 humble on Ubuntu 22.04 with ignition gazebo and I am trying to insert 2 turtlebot4 to my simulation. When I add only 1, it works, but when I add 2, I get many errors saying: ...
abdo Salm's user avatar
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116 views

can't spawn 2 turtlebot4 in Gazebo ignition

I am using ros2 humble with gazebo fortress on my Ubuntu 22.04, I am trying to spawn 2 turtlebot4 in my own world, I managed to spawn 1 turtlebot4 in my world but when I try to spawn a second one, I ...
abdo Salm's user avatar
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76 views

How to List Parameters for teleop_twist_keyboard Node in ROS 2?

I'm currently working with the teleop_twist_keyboard node in ROS 2 and am looking to fine-tune its performance for a project. Specifically, I need to list and the ...
Robotawi's user avatar
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1 answer
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turtlebot4 simulation stuck at Requesting list of world names

I am trying to run turtlebot4 on ROS2 humble with an ignition gazebo installed on my Ubuntu 22.04 machine. when I run the command ...
abdo Salm's user avatar
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0 answers
179 views

robot_state_publisher service not available, but listed in service list

I'm trying to update a ROS2 package working on Foxy with Turtlebot3 to Humble with Turtlebot4. So I'm sure my code is working there. While starting a gazebo simulation with a script (that works on ...
robot_lab's user avatar
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1 answer
106 views

Gazebo-Turtlebot turning by itself, cmd_vel topic is zero

I am using Noetic.I am simulating a multirobot navigation system with 4 turtlebots, I am using the navigation stack and Rviz. The problems begin when the goals of robots are reached. Sometimes one or ...
Michalis's user avatar
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1 answer
132 views

Problem of connection of turtlebot4 Lite to the Wifi network

I have acquired a new turtlebot4 Lite. I set up the network by entering the wifi name and passwd using ssh to enter the robot. I changed it from access point mode to client. After that I can't use ssh ...
Younès RAOUI's user avatar
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0 answers
100 views

Robot Model Drifing in Gazebo

I am trying to simulate a robot in gazebo, however when I monitored closely I saw that the robot is very slowly drifting. Then I tried it with already available different robot like turtelbot , ...
Ankit Kumar's user avatar
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0 answers
86 views

Running Kobuki on the Ignition Gazebo Garden and ROS 2 Humble

I am new to Gazebo. I could not find anything that can run Kobuki using the Ignition Gazebo, even though some can run Kobuki using the Gazebo. For example, we are trying to reproduce this site with ...
rryok's user avatar
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1 answer
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Caught exception in launch (see debug for traceback): Unable to parse the value of parameter robot_description as yaml

Hello, I am currently trying to run my TurtleBot2 on ROS2 Humble (using Ubuntu 22.04), but have troubles to import my modified URDF files. The bringup launch file worked for the preset URDF files but ...
user avatar
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3 answers
225 views

Running humble on Turtlebot3

Hi, I recently got a turtlebot3 burger and I only see instructions for installing foxy on it. I saw that the turtlebot3 GitHub page has humble support. Can I flash a regular Ubuntu 22 on the tb3 RPi ...
user avatar
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1 answer
3 views

Why is my marker getting displayed at location 2 but not location 1?

I am trying to create a home service robot using a turtlebot. In it the robot should start at origin at travel to point 1 where a marker has been displayed, stay there for 5 seconds and the marker ...
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0 votes
1 answer
145 views

Optitrack Motion Capture system and robot localization in Nav2 stack

Hello, I'm looking for some tutorials, documentation, code/configuration snippets, example projects and other sources with information on how I can incorporate an external Motion Capture System (...
ljaniec's user avatar
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1 answer
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Turtlebot2 Rviz 2d_pose_estimation and 2d_nav_goal don't work

I am using a remote computer to control my real turtlebot2. When I roslaunch turtlebot_rviz_launchers view_navigation.launch and I drag the ...
user avatar
0 votes
1 answer
91 views

Hokuyo UST-10LX connected via Ethernet and urg_node

Hello, TL;DR When I don't use urg_node with Hokuyo UST-10LX, I can see ROS2 topics from the robot on the other PC, after using ...
ljaniec's user avatar
  • 1,563
0 votes
1 answer
27 views

Power supply/charger for Kobuki base

I have a Kobuki base (Turtlebot 2) but my charger broke. I am looking to replace the charger but I am unsure about the type of barrel connector used to connect to the Kobuki. I was only able to find ...
Bonolo's user avatar
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0 votes
1 answer
36 views

RTABMAP problems with Turtlebot2

Does RTABMAP require a kinect camera? My turtlebot2 has different model of camera. I installed the ROS kinetic version of rtabmap-ros. I am trying to follow the ...
user avatar
0 votes
1 answer
12 views

Need Info on simulated turtlebot2(melodic and/or kinetic)

I am looking for where to get a simulated turtlebot2. I recall finding a github link but I cant remember. If anyone uses simulated turtlebot2s please tell me how you got it or if you can make a github ...
user avatar
0 votes
2 answers
14 views

Navigation: Robot cannnot reach goal

Hello everyone, I'm using navigation stack on a turtlebot-based robot. When launching move_base.launch, I can send 2d nav goal in Rviz and robot cannot find its way to the goal, it just makes small ...
user avatar
0 votes
1 answer
24 views

Rtabmap Object Obstacle Problem

Hi, I want to setup my turtlebot for Full autonomous Navigation with rtabmap. The first problem I encounter is that 3D irregular shape objects, such as chairs. In this case, if I use scan topic the ...
user avatar
0 votes
1 answer
138 views

Set the initialpose (ROS2)

Hello I am still relatively new to ROS2 and am currently working on getting my digital Turtlebot3 to drive around in a Gazebo environment. I'm using ROS2 foxy on Ubuntu 20.04 and for navigation I use ...
user avatar
0 votes
1 answer
33 views

Turned IMU sensor in robot

I mounted an IMU Sensor not in the default direction but 90 degrees turned. Does this has an effect on my navigation/ localization/ odometry or can the sensor turn things right due to gravity or ...
user avatar
0 votes
1 answer
95 views

Unable to install ROS TurtleBOT - Unable to locate package

My OS : Distributor ID: Ubuntu Description: Ubuntu 20.04.1 LTS Release: 20.04 Codename: focal My ROS /rosdistro: noetic /rosversion: 1.15.8 When I try to intall ...
user avatar
0 votes
1 answer
87 views

Unable to locate package ros-noetic-turtlebot3

Hello! I am trying to install the turtlebot3 binaries under ROS Noetic via sudo apt-get install ros-noetic-turtlebot3. However, I get the error: ...
user avatar
0 votes
1 answer
13 views

How to save wavepoints?

I am new to the ROS.Please help me out with the trouble. I am doing obstacle avoidance robot which self navigates and moves around the Room to given goals. I have used to wave points to give ...
user avatar
0 votes
1 answer
27 views

Rotate turtlebot 10 degrees about its axis

Hi all. How are you? How can I turn turtlebot2 10 degrees about its axis and then pause. Note: The robot will not move, it will just rotate 10 degrees once every say 20 seconds. I tried setting the ...
user avatar
0 votes
1 answer
4 views

I am getting while launching my turtlebot pn RVIZ

I am using turtlebot for my obstacle avoid robot using ultrasonic sensors.I am using 8 ultrasonic sensors.I dont know where the error is but ths it is successfully seen in gazebo but while I am ...
user avatar
0 votes
1 answer
5 views

Duration calculation and control in ROS - furthermore why does this script keep running even after pressing Ctrl-C?

Hi everyone, I have written some code to make the turtlebot turn around. The code is working. What I want to know is how fast the turtlebot is running and how I can control it. Forexample, how can I ...
user avatar
0 votes
1 answer
24 views

how to create yellow line path for turtlebot linefollower using gazebo?

I am totally new to ROS and Gazebo. Please help me with it. I want to create a turtlebot line follower using ROS , Gazebo, rviz, cv_bridge. I am following the tutorial given in (http://edu.gaitech.hk/...
user avatar
0 votes
2 answers
4 views

the terminal response global 'name ' is not defined

the terminal response global 'name ' is not defined ...
user avatar
0 votes
2 answers
43 views

How can I make the turtlebot3 walk forward through messages?

I appologize in advance for this simple question. I would like to move the turtlebot3 ahead as described in the Programming Robots with Ros book. (The book teaches ROS programming under ros-indigo, ...
user avatar
0 votes
1 answer
24 views

Installing Turtlebot Software on ROS Noetic in Kubuntu 20.04

I found the link on ROS.org but it shows instruction with ROS Indigo only. I then uninstalled ROS Noetic and tried to install ROS Indigo but after running the install command i got the message "...
user avatar
0 votes
1 answer
30 views

How to setup turtlebot3 on ROS Noetic

Hey guys, Does anyone know how to setup a turtlebot3 on ROS Noetic? I've trying to follow along the tutorials on this link by exchanging kinetic with noetic: https://emanual.robotis.com/docs/en/...
user avatar
0 votes
1 answer
14 views

TurtleBot3 Home Service Challenge costmap issue

Hello everyone! I have problems with the TurtleBot3 Home Service Challenge (http://emanual.robotis.com/docs/en/platform/turtlebot3/home_service_challenge/). I've installed everything according to the ...
user avatar
0 votes
1 answer
44 views

Default parameter file in navigation2

Hi, im searching for the default parameter file but could only find in opt/ros/dashing/share/nav2_bringup/launch/nav2_params.yaml some parameters but not the ...
user avatar
0 votes
1 answer
120 views

Can't establish connection to Web Server using rosbridge

I have created a simple HTML page to control the movement of a simulated Gazebo Turtlebot using roslaunch rosbridge_server rosbridge_websocket.launch following this ...
user avatar
0 votes
1 answer
34 views

How to connect Turtlebot in Gazebo to a Web Interface

I would like to create a web interface (website) using HTML/Bootstrap to control the movement of a Turtlebot in Gazebo. I have tried many tutorials but none of them have worked (most of the tutorials ...
user avatar
0 votes
1 answer
35 views

Question regarding ROS(turtlesim).Moving one turtle towards another turtle

I want to write a python node such that it subscribes to relevant topics and publishes to relevant topics to make default 'turtle1' at (5.444,5.444) move towards a newly spawned turtle 'blah' at (X1, ...
user avatar
0 votes
1 answer
11 views

path planning for turtlebot using moveit planner

Can I use moveit planner as global path planner for the turtlebot navigation? More precision: ros automatically use Djiasktra for path planning when navigating a turtlebot. I want ros to use one of ...
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