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Questions tagged [talker]

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How to create/destroy a node instance from a Python script

I'd like to have a script that will create/destroy a publisher node. I'm experiencing problems with that, being unable to correctly destroy the node instance. I'm running ROS2 Humble under Windows I ...
jpo38's user avatar
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1 answer
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Talker/Listener over SSH

Hello! I was wondering if it's possible to run the talker/listener examples with one of the machines being accessed by ssh. Both my machines have ROS Eloquent installed and I would like to have my ...
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Runtime crash of ROS2 talker due to struct representations in C and C++ with clang

[I've modified this question into more of an explanation, because the issue appears to be in my compiler, rather than with ROS2; however, it's an interesting trace through what I think happens when ...
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1 answer
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WSL: Ubuntu on Windows 10, unable to see published topics

I'm am trying to work with ROS2-eloquent on Ubuntu for Windows 10. I would like to create multiple nodes that can pass messages to one another while running independently in different terminals. I ...
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1 answer
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dll not found error when running ROS2 examples, any node, publish from command line on Windows 10

Hi, I am setting up ROS2 Bouncy on Windows10 and already encountered the following problem while compiling from source: ROS2 fails to build many packages on Windows 10, which I solved. EDIT: I found ...
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1 answer
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Subscribe in MATLAB to a ROS node on another PC

Hi, I have MATLAB running on a Windows-PC and ROS running on a separate Linux-PC. Both are connected in a network. On the Linux-PC I started ROS with the command "roscore". On the MATLAB-PC ...
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1 answer
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Can i use Float32 messages with the talker example in ROS2?

Instead of the normal std_msgs::string, i want to use std_msgs::Float32 in the demo_nodes_cpp talker example. is it possible to ...
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1 answer
38 views

How to publish integers values from a ROS node

Hi to all, I have a ROS node which publish data coming from encoders and current sensors (the node outputs velocity data, raw encoders ticks and currents). Currently, my ROS node publish all these ...
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1 answer
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A quetion from ROS noobie. Error in talker & listener configuration

Learning ROS from Mastering ROS for Robotics Programming book from yesterday. Actually i struck up in configuring talker & listener. Configuration & Errors as follows. I need some help to ...
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1 answer
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Not Working - Multiple Machines Tutorial

Tutorial: http://wiki.ros.org/ROS/Tutorials/MultipleMachines The following commands working on a local machine: rosrun rospy_tutorails talker ...
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1 answer
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[rospack] Error: package 'beginner_tutorials' not found

Hi I'm trying to learn the ROS tutorial --> Writing a Simple Publisher and Subscriber (C++) In terminal it can find: rosrun turtlesim turtlesim_node but not: rosrun beginner_tutorials talker It ...
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question about rosrun beginner_tutorials talker in Tutorials

I followed the Tutorials and built a talker.cpp and listener.cpp http://wiki.ros.org/cn/ROS/Tutorials/WritingPublisherSubscriber%28c%2B%2B%29 but when i run the command:$ rosrun beginner_tutorials ...
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1 answer
11 views

How to make a python listener&talker on the same node?

Hi, I would like to make a listener/talker in python. I already looked at the tutorials. However, these examples implement two separated codes, a listener and a talker, and I would like to implement ...
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1 answer
23 views

No data from SSH Connection

EDIT: Solved, see solution at the bottom of this comment. I'm trying to get two computers set up to communicate between ROS. I set up SSH, and can access the terminals of each computer from the other. ...
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1 answer
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How to achieve duplex communication? (listen/talk simultaneously)

For example, if I want my machine1 to send its updated status to machine2, and I also want my machine2 to also do the thing in the reverse direction. How should I do that? constraint: Both machines ...
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1 answer
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How to establish subscription/publication communication within C++ code?

To establish communication (simple listen/talk) between two machines, I simply use export ROS_HOSTNAME=ip1 export ROS_MASTER_URI=http://ip2:11311 rosrun ... ...
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1 answer
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Cannot get listener and talker working on two machines

So I have two machines #1 and #2. I selected #1 as the master by $ ssh #1 $ roscore Now I opened a new terminal on #1 and then ...
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1 answer
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Beginner Tutorial 11- unable to create talker/listener node c++

Hi, i am running ROS on an Ubuntu-VM with groovy and came across following problem. I just started using ROS and am trying to learn the features by doing the tutorial. (in other words: i am a newbie, ...
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2 answers
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Werid Multiple Machines Problem -

Hi, I'm not sure of this is simply a compatibility issue or something else. On one machine I have fuerte an the other electric. Both the simple talker and listener tut's work fine with run on each ...
MarkyMark's user avatar
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Declare a message outside of a node (scope problems?)

I am trying to declare a new message outside of my ROS node, then pass it into the ROS node. Multiple pieces of my program can generate GPS messages, but all the messages should be published to the ...
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1 answer
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How to connect Rosjava talker to a C++ Listener

I have created a talker in in rosjava and have created a listener in C++ code. When I run the talker and the start the listener I see this on the talker screen... May 11, 2012 2:53:01 PM org.jboss....
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Talker issue on Android pubsub tutorial

Hello, I have installed the pubsub android tutorial on an android device and have it connect to an external roscore in order to have a talker/listener system between the android device and the ...
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