Questions tagged [rostopic-echo]

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ros2 topic echo for arrays

Is there an equivalent to rostopic echo /predictions/agent[0]/intention in ros2? I can use ...
WeirdRobot's user avatar
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ROS1 Custom messages generates strange memory graph pattern when using multiple string types

In ROS1 Noetic, I have the following custom message named Test.msg: int32 did string a string b And I have another custom message TestList.mgs: Test[] testList In ...
Enikő's user avatar
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scan data not published after running depthimage_to_laserscan

Camera : Intel realsense 435D Computing device : NVIDIA JETSON ORIN currently im converting depthimage to laserscan .I'm providing the package(depthimage_to_laserscan) with the topics /camera_info and ...
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ROS2 Topic Echo does not work after ROS2 reinstallation

I recently had to uninstall ROS2 Iron and install ROS2 Humble using sudo apt uninstall ros-* after uninstalling I did ...
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How to create topics and synchronize them when recording a bagfile

Hello everyone, thanks for taking the time to check my post. So let me describe what I want to do. For starters I have a bag file containing a topic which carries a directory path at each message, ...
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Is there a way to extract specific info or lines from a ROS topic?

echo /joint_states has the following output (shortened). I made a node (using the rospy tutorial) to subscribe to /joint_states and I want the.py script to print() just the position list for use ...
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Semantics of `%time` timestamp in `rostopic echo -p` from bagfile?

When I print the topic data using rostopic echo -p -b filename.bag /topic_name, there are two timestamps in the output. One comes from the header of the message (...
moooeeeep's user avatar
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Gazebo segfaults when Lidar senses an obstacle

I am using Ros Kinetic on Ubuntu 16.04. I am trying to simulate a quadrotor with lidar attached to it. I have found the Rotors_Simulator repository and manually added a Hokuyo lidar for simulation in ...
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Getting stuck on ROS for Raspbian Jessie

I am following this tutorial on installing ROS Kinetic on Raspbian Jessie and I got stuck Building the Catkin Workspace. /etc/dphys-swapfile has been configure to ...
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2 answers
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Problems rqt_plot array

Hi! I am trying to plot a topic /mytopic/taskSpace/position[0] using rqt_plot. My ROS version is Indigo and I have Ubuntu 14. When I type in the console rostopic echo /mytopic/taskSpace/position[0] I ...
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Mono16 images displayed as 8 bits in rostopic echo

Hi there ! I generate a 16bits image (stored in an opencv CV_16U) that I convert to a msg using cv_bridge with the right encoding (mono16). When I do a rostopic echo on the image topic, I get this ...
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Nodes stop subscribing over time

I'm running ROS hydro on Ubuntu 12.04. I've written a simple python script that calculates the bandwidth though a network interface and then publishes as an Int16. So there's no data acquisition from ...
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Check on a rostopic programatically?

I've tried searching for this but have been unsuccessful so far. Is it possible to see a topic's value, programatically? Basically, I need the functionality of rostopic echo, but I need to add it to ...
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Getting endpoint states of robot

I'm using a Baxter and I want to get the endpoint states of my robot. The endpoint states are located in the topic /robot/limb/left/endpoint_state and on the ...
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2 answers
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ROS msg format specification

Hi All, I have created a custom CAN bus message but I would like to change the way that the information is printed out. My .msg file is: ...
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How to read a value from a ros message?

Dear friends, I am new in ROS, I am usinig CMVISION package, and the tos topic which I need is " /blobs ", with type "cmvision/blobs" $ rosmsg show cmvision/Blob uint32 red uint32 ...
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help with simple /map publisher that will not publish - python

How do I publish this test data to the /map topic. I would like to use this routine to test other things I'm working on. I think I'm doing it right but when I type 'rostopic echo /map' I see nothing. ...
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rostopic echo to webpage

How can iI export the output from rostopic echo (for example the battery level) to a webpage? Originally posted by agrirobot-George on ROS Answers with karma: 1 on 2013-06-04 Post score: 0
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Publishing arrays unsuccessful

Hi all, I have been following this question very closely. This is how mine looks like: def talker(armj_acc) : ...
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