Questions tagged [turtlesim]
The turtlesim tag has no usage guidance.
89
questions
0
votes
1
answer
16
views
Turtlesim: Stop after one turn. Subscriber way faster than the Publisher
I am interested in drawing one circle with the turtlesim. However the subscriber is retrieving the pose way faster than the publishers moves the turtle. This is the code that I came up with:
...
- 5
0
votes
0
answers
7
views
#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 ...
- 1
0
votes
0
answers
19
views
0
votes
1
answer
100
views
How can the ROS 2 TurtleSim turtle icon be changed?
In the turtlesim program used in many ROS 2 tutorials, there is a turtle icon that can be controlled. I would like to change this icon to be a different image that I have been provided, so that when I ...
1
vote
1
answer
225
views
how to use the rate.sleep function properly
So I have a task of making turtle sim draw a heart using parametric equations I don't know if all my equations are correct but here's my code
...
- 11
0
votes
1
answer
6
views
ros2 how to make turtlesim use the same turtle every time?
when launching turtlesim I usually get a different looking turtle bot every time, probably it's random.
Is there some variable I can use to make turtlesim use the same specific turtle every time ?
...
flanel
0
votes
1
answer
4
views
ROS Action with no Subscriber
Iam creating an action server and the process is just rotating turtlesim depending on how many times the goal is set to. As far as I researched, the sample codes for ROS Action have their main ...
naihart
0
votes
1
answer
3
views
How to have random number every node run
Im using this rand() function on my code. When I first run the node, it gives me random number, but when I run the node again, it gives me the previous random number. I applied this code on turtlesim/...
naihart
0
votes
1
answer
6
views
ROS Service (client inside server node)
Is it possible to put a client node inside a server node when making service?
Iam trying to make a Service and as far as I know, all the functions are stored in the server node and inside the client ...
naihart
0
votes
1
answer
2
views
Publishing data from Spacenav node to other topics
Hello! I'm working on a small teleoperation program (currently only for the turtlesim and afterwards for an UR5e robot arm) using a Spacenav 3dconnexion joystick and I'm trying to figure out how to ...
horvath.daniel
0
votes
2
answers
28
views
How to find the source code for a ROS 2 package, say, turtlesim?
I see that ROS2 tutorials uses turtlesim, but where is the source code (on Github) for the ROS2 turtlesim package? The one on GitHub seems to target ROS1 or maybe I am wrong.
Originally posted by ...
Zhoulai Fu
0
votes
1
answer
16
views
rosrun turtlesim turtlesim_node error while loading shared libraries
Hi,
i'm trying to learn ROS and I am following the tutorial http://wiki.ros.org/it/ROS/Tutorials/UnderstandingNodes.
When I reach part 1.7 I use rosrun but it returns an error:
...
Simone Diomede
0
votes
1
answer
8
views
Error in /opt/ros/melodic/include/ros/ros.h
Hi,
I'm trying to read user input from keyboard, inspired by turtlesim.
When I compile I get this error:
...
bach
0
votes
1
answer
6
views
export ROS_HOSTNAME, ROS_MASTER_URI configuration problem
Hello all,
I was trying all day to figure out why my cmd won't accept my arrow keys as input for the turtlesim example.
At first I though there was some configuration problem with the shell I use (zsh)...
mzouros
0
votes
1
answer
4
views
Tutlesim GO2GOAL python code error : TypeError: unsupported operand type(s) for -: 'str' and 'float'
I tried the following code from Turtlesim tutorial (GO TO GOAL):
...
Paul Pavish
0
votes
1
answer
2
views
vel_msg not declared in scope using turtlesim geometry_msgs
I'm following a beginner turtlesim tutorial to make a simple move node. It seems that geometry_msgs cmd_vel is not being found despite being in my CMakeList.txt and package.xml
...
quadman
0
votes
1
answer
8
views
Error running Turtlesim noetic
Good Afternoon All,
I am going through the tutorial at : http://wiki.ros.org/ROS/Tutorials/UnderstandingNodes. I ran the command :
rosrun turtlesim turtlesim_node and it generated the error :
/opt/...
chm007
0
votes
1
answer
56
views
qt.qpa.plugin: Could not find the Qt platform plugin "windows" in ""
ROS 2 tutorial, Introducing turtlesim and rqt, instructs us to execute the following commands in two cmd windows (I am exercising on Windows 10 platform), ...
Sofia.Mabrey
0
votes
1
answer
12
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, ...
Gun_Kan02
0
votes
1
answer
1
view
0
votes
1
answer
21
views
Does anyone know where i can find source code of turtlesim package?
I want to understand how this simple simulator works. I can't find any good explanation. For example, in ros_tuturials they say:
run roscore
rosrun turtlesim turtlesim_node
rosrun turtlesim ...
ARS
0
votes
1
answer
1
view
tutrlesim_node fails due to incompatible Qt library
Hello,
I am new to ros, and currently following the beginners tutorials. I installed ros melodic on Ubuntu 18.04 and followed the instructions up to section 7 in http://wiki.ros.org/ROS/Tutorials/...
EugVal
0
votes
2
answers
3
views
How to control turtlesim by a publisher data sent by arduino rosserial
I'm noob in ROS, and i used this aduino code to send Float64 data to ros
...
requestadepache
0
votes
3
answers
225
views
Formatting ROS data to .csv file
I created a Rosbag of turtlesim data and would like to export the x and y coordinates only to a .csv file. Right now, however the formatting is as such:
...
carlito898
0
votes
1
answer
5
views
In the turtlesim tutorial "Moving in a straightline", which instructions actually move the turtle?
I am reading the turtlesim tutorial "Moving in a straightline".
http://wiki.ros.org/turtlesim/Tutorials/Moving%20in%20a%20Straight%20Line
I do not understand how the software moves the ...
Zhoulai Fu
0
votes
1
answer
1
view
ROS Answers SE migration: ros2 turtlesim
Hi,
I wonder whether there will be soon a package for turtlesim on ROS2.
I downloaded bouncy, but there is no turtlesim package.
Also, is there any robot simulator in current ROS2 packages?
When it ...
Anis
0
votes
1
answer
2
views
Why can I import from a package which is not part of my dependencies?
I created a ROS package, my_package, with dependencies rospy and geometry_msgs. Then I ...
nbro
0
votes
1
answer
51
views
How to change color of turtlesim background using python code
Hi, guys, I'm trying to publish data to turtlesim color_sensor that is trying to display different colors my problem is it publishing data but it's not working. I did call $ rosservice call /clear ...
bharadwaj26
0
votes
1
answer
1
view
python syntax error for rosrun .py script
Hello I'm a noob at python, I downloaded this github package (turtlesim_hunter)
Then when I rosrun I get a syntax error:
...
KevinH
0
votes
1
answer
5
views
Mouse Teleop TurtleSim
To whom it may concern,
I have managed to work turtlesim with the turtlesim_teleop_node using a keyboard but require to turn using mouse control.
i have tried to find the method and cannot find one on ...
RosStudent
0
votes
1
answer
9
views
Question on turtlesim tutorial: Go to Goal
Hello,
I am new to ROS and I am trying to implement the Go to Goal tutorial in C++ (the tutorial itself is in python but wanted to implemented it in C++). The part I am having trouble understanding is,...
prasgane
0
votes
1
answer
2
views
something is wrong when i run turtlesim_node
I am a beginner, I am learning ROS.org I use the ‘indigo’ version
when i run this "rosrun turtlesim turtlesim_node"
The screen display
[ERROR] [1505802741.783016851]: [registerPublisher] ...
summer
0
votes
1
answer
2
views
Calculating distance using linear velocity and time
The general simplest approach in ROS is to calculate the distance by multiplying the time elapsed with the linear velocity. As can be seen from this link http://wiki.ros.org/turtlesim/Tutorials/Moving%...
sandhan26
0
votes
1
answer
7
views
Using turtlesim
I'm thinking about simulating a ROS robot running a maze. I thought of using TurtleSim instead of Gazebo because: it is lighter weight with only 2d, and I would be able to define the maze in two ...
- 463
0
votes
1
answer
1
view
Qxcb connection on rosrun turtlesim
Hi all,
I am following the beginner rosnode tutorial http://wiki.ros.org/ROS/Tutorials/UnderstandingNodes
I have installed ros in bash. When I enter command "rosrun turtlesim turtlesim_node" ...
Isam Abdullah
0
votes
1
answer
2
views
Cannot communicate/ping the turtlesim
I am going through the tutorials and have reached point of using the turtlesim for learning about nodes, etc. I am trying to ping the turtlesim node, but there is no communication with the turtlesim. ...
nathanspotts
0
votes
1
answer
4
views
Joystick operation for a gazebo ros youbot
Hi everyone,
I have created a node just like teleop_joy using ros.org. It publishes a topic /joy and the type of message is sensor_msgs/Joy. My youbot has a topic /cmd_vel and the type of message is ...
manju
0
votes
1
answer
2
views
[roslibjs,rosbridgesuite] How to get data back from the robot in turtleSim
According to the roslibjs documentation, we should be able to get the data back from the robot by using a listener:
...
nerdyTurtle
0
votes
2
answers
4
views
Where is the source code of installed packages?
I have installed ROS Kinetic and it sits is the /opt/ros/kinetic/ folder which has the following structure:
...
danyloM
0
votes
1
answer
10
views
rosrun cannot find executables under turtlesim
I know this question has been asked many times, but I really wanted to understand what was wrong with my commands and environment setup. I tried solutions from other sources but none worked in my case....
GarethZhang
0
votes
1
answer
3
views
rospy.ServiceProxy( ) is not working
Hi there, I am incredibly new to ROS, and I am trying to learn by creating a program with turtlesim. I am currently writing a node that will call turtlesim's Spawn service, and I am getting an ...
alambert
0
votes
1
answer
1
view
Weird rqt_graph when running turtlesim
I am going through the ROS tutorials and on the "Understanding Topics" tutorial in section 1.2.1 when I launch rqt_graph I get this image:
It should be ...
luketheduke
0
votes
1
answer
5
views
how to control the turtlesim_node through "turtlesim/TeleportAbsolution" in my own package
Hi, all
I learnt from the ros_tutorials wiki page that the turtlesim_node can be controlled by running the following command in shell:
"rosservice call /turtle1/teleport_absolute 5 5 0"
I ...
leehui
0
votes
1
answer
1
view
I got some problem
dear all,
I want to run a simple example like this
sony@sony-virtual-machine:~$ rosrun turtlesim turtlesim_node[ERROR] [1429091431.360422919]: [registerPublisher] Failed to contact master at [...
sony
0
votes
1
answer
1
view
Sleeping thread after publishing a message into a topic
Hi,
I've been using rosbridge and jroslib as an API to it. Testing the jroslib with the turtlesim, to publish messages I'm finding some errors. I have to use Thread.sleep(500) to the thread sleep so ...
pnakibar
0
votes
1
answer
1
view
turtlesim_node: cannot connect to X server
rosrun turtlesim turtlesim_node
turtlesim_node: cannot connect to X server
what is the problem? help please
Originally posted by Ainur on ROS Answers with karma: 3 on 2015-01-28
Post score: 0
Ainur
0
votes
1
answer
19
views
cant move turtle in turtlesim with key inputs
I am trying to go through the tutorial. I am on " Understanding ROS Topics". I can get the turtlesim open but when I try to move the turtle, nothing happens. No, keyinputs appear in the ...
mercury
0
votes
1
answer
1
view
Topic not being created properly
Hello, I am using ROS groovy and I have created a .cpp file that is suppose to use the command_velocity topic in conjunction with ros turtlesim to move the simulated turtlebot in a direction, When I ...
choog
0
votes
1
answer
3
views
tf/tutorials/adding a frame
After I run the problem, all I can see and do is to move turtle1 turtle2 is always stationary no matter where I moved my turtle1. Is there anything I miss doing ? I am running in groovy.
Thank you
...
elthef
0
votes
1
answer
15
views
Problem of running "rosrun turtlesim turtlesim_node"
Hey guys, I am new to ros and try to learn it by going through the beginner tutorial. However, when I tried typing the code "rosrun turtlesim turtlesim_node" provided in "...
mrq44106