Questions tagged [ros2]

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Modelling/Theory for Quadraped Robot Leg Example

I have been working on attempting to replicate the following robot developed by some MIT graduates. https://dspace.mit.edu/handle/1721.1/98948 Presently, I am trying to work out the model for a single ...
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PointCloud2 parse to xyz array in ROS2

I'm trying to find a solution of converting PointCloud2 message data into xyz array for further analysis. Though, in my case I'm interested only in 2d application. The information is either scarce or ...
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slam_toolbox mapping is not life-long?

I've tested slam_toolbox producing life-long environment mapping, and not quite satisfied with the results. Below you can see a fragment of the mapping. I used a 1x0.5m case to test the changing map ...
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Dynamic mapping without localization in ROS

I have a /scan topic coming from a 2D lidar scanner. The task is to receive a mapping of the dynamic environment. It is assumed that the position of the scanner is always known, so localization is not ...
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How to make gmapping dynamic, or advise any other methods to create mapping of a dynamic environment

it is a general question. Gmapping seems to be used only for creating a map of the static environment. Once created, it doesn't account for any changes - you add a new object, but it's being ignored ...
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ROS 2: rqt vs rqt_graph

In ROS 2, what is the difference between the rqt and rqt_graph commands? They both seem to bring up the ...
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Creating a custom msg in ros2

I have a package with two nodes, that are communicating internally. For that reason I would like to create a custom msg to transfer data between them. I've followed this tutorial, which basically sets ...
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ros2 interface name is not multicastable

I am new to ros2. When I try to run a launch file, I get this message. selected interface "interfaceName" is not multicast-capable: disabling multicast I get this message when I use galactic,...
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base_footprint vanished on converting urdf to sdf

I am using ROS2 Foxy and Gazebo11 in Ubuntu 20.04. I converted a xacro file to a urdf file using xacro my_file.urdf.xacro > my_file.urdf, and then converted this ...
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140 views

OPC-UA in ROS 2 to communicate with PLC

I would like to establish a communication between my PLC (RevPi) which runs Codesys and a Jetson Nano (or Rasperry Pi) which will be running ROS2. The latter will be connected to a Router (for ...
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robot_localization does not publish /odometry/filtered topic or /accel/filtered topic

No data on /odometry/filtered topic or /accel/filtered Operating System: Ubuntu 20.04 with ros2-galactic Version or commit hash: Galactic I run the sam_bot_description with robot_localization ...
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356 views

robot_localization EKF node does not publish on /odometry/filtered (ROS2 Foxy)

I am using ROS2 Foxy and Gazebo 11 in Ubuntu 20.04. I have a URDF description of a mobile robot that uses 4 wheels for mecanum drive. Using the robot_localization package, I am creating an EKF node ...
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How to control a servo using ROS2 and MICRO-ROS

I am currently using a raspberry pi pico and a raspberry pi 4, So far I have established a connection between the two using micro-ros-agent I have also successfully built and ran the example provided ...
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How secure is ROS2?

How secure is the data transmission between nodes? is safer to use in industrial applications? I need to replace the RS485/modbus communication in an automobile industry
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240 views

Getting A Head Start With iRobot Create3 (ROS2)

With the announcement of the iRobot Create3 "with ROS2 support", and to get a head start playing with it, iRobot has some create3 GitHub repos: https://github.com/iRobotEducation/...
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How to perform decoupling between decision making and action execution in ROS2?

Hi I'm making a robot using: ros2 foxy OS Ubuntu Linux 20.04.2 LTS (Focal Fossa). Linux 5.8.0-59-generic I built an Action based on the tutorial Building an Action Server and Client. Then expanded ...
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250 views

When reading serial data between Arduino and a node, it hangs. How can I properly send and read data?

I'm using ROS2 foxy with no libraries installed. It runs on an Ubuntu 21.04 x64 machine with kernel 5.8.0-59-generic. I created a project with the goal of controlling an Arduino using python serial in ...
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1 answer
84 views

Robot Operating System can be usable other than Robot application?

I am asking very general question, but i would appreciate if someone helps me. I want to use ROS for manufacturing process (Not robots) as a middleware that can create simulated Cyber physical system ...
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2 votes
1 answer
486 views

Why does ROS2 claim to be "real time"?

ROS2 uses DDS, in the wiki it says that DDS is "The Data Distribution Service (DDS) for real-time systems is an Object Management Group (OMG) machine-to-machine (sometimes called middleware or ...
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208 views

ROS2 and TypeError when publishing custom message to Topic

I have defined a custom message: uint8[] data The custom message is imported in my Node class with no problems: ...
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