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Questions tagged [roscore]

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2 votes
1 answer
140 views

roscore does not start

I am compiling Noetic from source under a Debian 12 bookworm distro for an arm64 SoC. After a successful build and install, if I launch the roscore command, I only see this in the console: ...
0 votes
0 answers
111 views

FIXED ROSCORE Error when trying to run

[FIXED] Both comments under this post solved the issue, i was trying to run rviz with the command rviz and not rviz2 and it turns out i had a weird mix of ROS 1 and ROS 2 so uninstalling and ...
0 votes
1 answer
52 views

Manually controlling the ROS driver from Python

What is the best approach to launch a ROS file? Do I need to check that roscore is running before running it?
0 votes
0 answers
116 views

ROSCORE - not running due to python package missing

I have installed the ROS noetic and when I tried to run the roscore command, I get an error. Ive already tired re-installing the ROS environment, but it didnt help to solve the issue. Can anyone guide ...
0 votes
1 answer
770 views

"ERROR: Unable to communicate with master!" and "Unable to Register with master node"

Hello, I have two computers on a local network. First of them has Ubuntu 18.04 as OS, ROS Melodic installed and connected to the network with an Ethernet cable. The other one has Windows 10 as OS, ...
0 votes
1 answer
67 views

Odd Docker roscore/roslaunch delays with Linux kernel 6.1

Hello, I have an odd one here and am trying to figure out a possible root cause! The Situation I am running a custom Linux version made using Buildroot, with application ROS code containerized. I have ...
0 votes
2 answers
49 views

How to check if network connection or remote ROS Master is down?

I am running ROS (Kinetic on Ubuntu 16.04) on two machines (desktop pc and Jackal pc) and the Jackal pc is set as the ROS Master. The both machines are connected over a wireless network. I am writing ...
0 votes
1 answer
13 views

ros::ok() and ros::isShutingDown() and thread

I used ros::ok and ros::isShuttingDown inside a thread to find out if the user closed roscore in the terminal by pressing Cnrl+C. However, when I do that, the values of those to function do not change,...
0 votes
1 answer
12 views

Master-slave, are those can have different rosbags?

HI We are currently dealing with remote communication control strategy and I wonder Mater-Slave returns different rosbags if rosbag package running on different machines. In fact, we want to record ...
0 votes
1 answer
33 views

roscore fails at the start : error while loading shared libraries: libboost_thread.so.1.71.0: cannot open shared object file

Does anyone have any idea why the roscore fails at the start because of a strange library error? This never happened to me and it is a very strange error: ...
0 votes
1 answer
105 views

Check ros2 node status

When using ROS1, I am able to use ros::master::getNodes to check the nodes that is functioning through code usage. I wonder to know is there any way that ros2 can achieve the same functionality which ...
0 votes
3 answers
70 views

How can I run roscore from python?

Whenever I launch a node from python using the roslaunch script api : ...
0 votes
1 answer
4 views

How to add a new ROS core package without new build of all core package?

I need to build the ROS from the source on Rasbian Buster (R-Pi 4). I followed the instructions from this site. First I installed the desktop core version with these steps: ...
0 votes
1 answer
2 views

Roscore without peer to peer

Hello, Might be an odd question. Is there a way for Roscore (i.e Master) to disable p2p and act as a server transmitting data back and forth instead of letting peers communicating between them ...
0 votes
1 answer
71 views

roscore not working (upstream packages)

Running roscore gives this error: ...
0 votes
1 answer
80 views

How to properly set up a remote roscore with multiple remote nodes?

I am very new to ros. My friend and I have a scenario where only one of us has the hardware, but we'd both like to try to get live stream data without having to replay the data. Ideally we want to use ...
0 votes
1 answer
1 view

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: ...
0 votes
1 answer
6 views

Command 'roswtf' not found,installation failed

How to solve it? ...
0 votes
1 answer
72 views

roscore can't be found

After installation melodic in ubuntu 18.04 for first time,i input "roscore" in ubuntu terminal command port, i see as follows: ...
0 votes
2 answers
9 views

How to tell remote machines not to start separate roscores when using roslaunch? (Fuerte regression?)

Hi My goal is to start nodes on different machines using roslaunch while all the nodes should communicate to one master. This worked in electric. In fuerte the same process starts now a master for ...
0 votes
1 answer
9 views

Roscore is missing from my fresh melodic install

How do I install roscore for melodic on ubuntu 18.06? the docs are rather useless in regard to the installation packages for just about every tool that the tutorials are wanting me to work with. Can ...
0 votes
1 answer
4 views

minimum libraries required to run ROS

Hi everyone, I'm preparing to enable ROS on my own embedded developing ARM board. The board runs a customized version of Linux (not Ubuntu or other distros), with limited number of thirdparty ...
0 votes
1 answer
4 views

Accidentaly deteled python2.7 and roscore is dead

Hi! I have accidentally deleted python2.7 and now I can't run roscore. I tried to reinstall it but.. ...
0 votes
1 answer
2 views

ROS publishers & subscribers still transmitting data after roscore closed

Hi, I am working on a scale city project where we will have some cars running along a track connected to a watchtower. We have decided to use ROS for the project and are running Kinetic on Ubuntu 16....
0 votes
1 answer
9 views

master_api.py exists, but rosmaster cannot locate it

When I run roscore, i get this: ...
0 votes
2 answers
12 views

Problem with roslaunch on rc.local startup

Hello, I tried launching some nodes on startup via rc.local, but I have the following errors on some of the startups: ...
0 votes
1 answer
33 views

error unable communicate with master

Hello, I'm trying to setup a workstation to work with a Turtlebot. I've followed the tutorial here : wiki.ros.org/Robots/Turtlebot/Network%20Setup Robot IP is : 192.168.0.152 Workstation IP is 192.168....
0 votes
2 answers
5 views

Can"t find libroscpp.so fedora 21

Hello all ! Might be good information to know that I'm using the repo for here to try Ros on Fedora 21. All was working fine before today when I tried roscore and I was hit with this error on start-up ...
0 votes
1 answer
5 views

Rostopic pub from master (one laptop) to nodes (other laptop)

Hello, I have the following configuration: laptop 1 that is the master (it runs "roscore") - it doesn't have the package or messages used by nodes laptop 2 that has two running nodes I ...
0 votes
1 answer
46 views

"roscore" is not initializing - ROS MELODIC

I have installed ROS_MELODIC in my Ubuntu 18.04.1 LTS machine. When I started the ros master with roscore, I got an exception as quoted. ...
0 votes
1 answer
143 views

Time is out of dual 32-bit range

I am using ROS Kinetic on Ubuntu 16.04. After updating my system this morning (which included a lot of ROS packages), rosout and other nodes are crashing with the following exception: ...
0 votes
1 answer
53 views

rosversion error when trying to run roscore

Hello, when I try to run the roscore or start my project launch file I get the following error: ...
0 votes
6 answers
244 views

Best way to check if ROS is running

I am writing a script, which relies on ROS currently running. I would like to check if ROS is currently running on the script's machine. What's the best way to do this? A couple ways I am considering ...
0 votes
1 answer
2 views

Traces of Gazebo left even after it has exited

I came across this today. I had exited Gazebo and yet when I looked at my topics I still saw that cmd_vel (and a bunch of others) were still being subscribed to by Gazebo. I could find no process ...
0 votes
1 answer
50 views

run ros terminal commands within a python script

I have my ros program ready, and I can control my robot using the terminal commands. Now, I am trying to write a python script to control the robot as I do with the terminal commands. For this purpose,...
0 votes
1 answer
39 views

Run roscore from python

Hello, I am trying to automate the launch of multiple nodes with the roslaunch API. So far, I am able to do what I want, and my nodes are running perfectly. (I am also able to stop them). Now, I ...
0 votes
1 answer
8 views

ROSCORE server on android

Hi, is it possible to run a ROSCORE or a minified version of it on an Android phone? What i want to do is i have a ROS Node A and Android cellphone B without a ROS MASTER (Ubuntu). A and B will be ...
0 votes
3 answers
2 views

ROS Answers SE migration: roscore error

I have searched but have not found anything that adequately solves my problem. When I type in "roscore" to test ros and make sure my installation was successful it displays this error: ...
0 votes
1 answer
8 views

/clock topic not recived on master

I am building a G-mapping based SLAM robot . Master - This is my desktop . roscore is running here 192.168.1.6 is the IP address Robot - The robot is hooked to a RPI3 . I have added this to the ....
0 votes
1 answer
7 views

I'm getting no response from this command: rosrun rosserial_python serial_node.py /dev/ttyACM0

Hi everyone, I'm getting to know ROS with arduino programming, and I'm struggling to run ROS as I complete the first tutorial of Hello world . Roscore seems to work because the terminal begins ...
0 votes
1 answer
3 views

One base multiple robots with unstable network

Hey, I am looking for a way to set up a configuration with multiple robots that connects to one base. This base is broadcasting data that's needed by all robots. I was thinking about setting roscore ...
0 votes
1 answer
74 views

How to shutdown all nodes

What's the easiest way to signal all nodes to shutdown? I created a daemon that runs several launch files in the background, but now that even if I kill the roscore, the other nodes don't end, they ...
0 votes
2 answers
265 views

Proper way to shutdown /rosout (roscore)

Hello, I have a project where i start gazebo and several other rosnodes. I want to be able to shut them all down at some point. I have a node that waits for a certain message and then shuts all other ...
0 votes
1 answer
9 views

Running ROS across multiple machines is failed

Hi All, I am trying to run ROS across 2 machines, master is starting with out any issues when I tried to run listener getting below errors. ...
0 votes
1 answer
47 views

Unable to communicate with master with roscore running

Hi, I am trying to subscribe to a node I launched on a raspberry pi on my laptop. I am able to SSH into the raspberry pi to launch the node (the problem is not that roscore isn't running because it is)...
0 votes
1 answer
8 views

Where is the message definition stored?

When a topic is advertised, are the md5 and the message definition of that message type stored somewhere accessible on the Ros server (By another node) or are they only sent with the message itself ...
0 votes
1 answer
19 views

setup.bash every time?

the last few times I have done anything w ROS while doing beginning tutorials, I just say 'roscore' and it seems to all run fine, but now im watching a video and it seems like he's saying I need to do ...
0 votes
1 answer
18 views

How to start ROSCORE automatically in UBUNTU

Hi I need to know if is possible to auto start ROSCORE in RASPBERRY PI automatically like a daemon. I tried to create a Daemon but nothing happen. Originally posted by barovehicles on ROS Answers ...
0 votes
1 answer
6 views

Problem configuration with roscore?

Hi, I recently install Ros Kinetic, using the tutorials, but I've seen some troubles while I launch the roscore, because it only launch when I have internet connection. ...
0 votes
1 answer
1 view

first 'roscore' and a question arrises- like i'm 5

~beginner decrypting the workings of ROS~ hmm.. how to phrase this.. well, partly, I'm wondering if I need to also be in my catkin workspace before roslaunching... what is the difference between the ...