Newest Questions
47,102 questions
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Need service node to not send response before recieving a msg on a topic
i have the following issue;
Node is a service node, and a subscriber. When the service recieves a request, i want it to wait for a msg on the topic it subscribes to before the service returns the ...
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1
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5
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Overriding node parameters after calling rclpy init
I want to be able to write tests to verify that a node initialises correctly with different parameters. The parameters are retrieved/defined in the node's init function as follows.
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6
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How to delete shared memory files created by ros2 specifically?
I run ros2 applications in docker-container and communication based on shared-memory. The containers will stop or restart occasionlly, so i want to clean shared-memory created by specific container to ...
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12
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Issue with Follow Path when following a straight path
I am providing the follow path controller sever in Nav2 with a set of global points to follow as below:
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19
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Pointcloud not aligned with with map
i am new to robotics and i want to build a robot that has a lidar sensor, depth camera and which detects traversable soft objects (using yolo) and extracts only the depth image of the detected objects ...
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1
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16
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trajectory preempt with FollowJointTrajectory controller is not smooth
I implemented a soft stop function (in two variants) to stop the motion of a manipulator in my repository (ManyMove)
It basically builds a single-point trajectory with time_from_start in the future, ...
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16
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What types of embedded controllers (PLCs, FPGAs, ARM boards, etc.) are used with ROS 2 in real-world robotics applications?
I'm a robotics student trying to understand what kinds of embedded or industrial controllers are commonly used in real world or production level robotics applications with ROS 2.
I'm especially ...
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10
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Could not contact service /abc/controller_manager/list_controllers
I have problem with launching my robot in my declared namespace. I mean for example "abc". After adding namespace, there are warnings:
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34
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How can I implement obstacle avoidance with an FHL LD20 LiDAR sensor on an ESP32-based robot (without ROS)? [closed]
I'm working on an electronics project where I'm building an autonomous mapping robot. The robot is based on an ESP32 microcontroller and uses a 4-wheel chassis with two dual motor drivers (L298N).For ...
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1
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34
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Colcon doesn't build subfolders
I'm building a ros2 (jazzy) python package with the following structure:
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1
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15
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Compatibility of IMX500 AI Camera with ROS 2 Iron on Raspberry Pi 5 and Ubuntu 24.04.2
I'm currently working on a robotics project using ROS 2 Iron on a Raspberry Pi 5 running Ubuntu 24.04.2 (64-bit). One of my key components is the Sony IMX500-based AI camera (Aitrios), connected via ...
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ESP32 micro-ROS RPLIDAR N10 + MPU6050 publishes /scan & /imu/data_raw but SLAM Toolbox shows “No map received”
I’m building a handheld mapping setup with:
ESP32‑WROVER‑E running micro‑ROS
UART2 → RPLIDAR N10 → publishes /scan (sensor_msgs/LaserScan)
I²C → MPU6050 → publishes /imu/data_raw (sensor_msgs/Imu)
ROS ...
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I want to know the best motor to select for my robotic arm and why it is the best choice among other motors [closed]
I am designing a robotic arm with the aim of maximizing strength while minimizing weight.
What are the key factors that ? should consider in selecting a suitable motor, and why are the important ...
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6
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NED to ENU Conversion Causing Depth Cloud and Pose Mismatch in ROS2
I'm working with a multi-UAV simulation using GZ Harmonic, ROS2(Humble) and PX4 SITL. Each UAV publishes its pose to /vehicle_pose and depth image data from a stereo camera. The depth points and pose ...
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5
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Trying to use Gazebo depth camera with visibility mask
I have a Gazebo Harmonic simulation with a depth_camera sensor attached to my robot. I want to exclude certain visuals from the depth image. As far as I understand using the ...
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6
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'Save world as' not saving the world - Gazebo Fortress
Am I the only one who is experiencing this bug in Gazebo Fortress when trying to save the world using 'save world as' in the GUI?
Any help will be highly appreciated.
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1
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12
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Can't add moveit interactive marker due to Namespace
I am using Moveit for robotic arm simulation. I want to use multiple robotic arms in Gazebo simulation. To differentiate the topic and ...
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2
answers
48
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ROS2 Control: How do controllers subscribe to topics?
My question is: How can a ros2_control controller be made to subscribe to a topic?
I've been working in robotics for a while now, but I'm relatively new to the ...
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7
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unequal number of readings each time in /scan topic (ranges vector length)
I'm experiencing an issue where the /scan topic publishes a ranges vector with an inconsistent number of readings in each message. How can I ensure a fixed number of range readings per scan?
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ROS2 Teleop Architecture for Multi-Robot Lab – Feedback & CAN Advice?
I’m building a modular ROS2 teleop control system for several robots in our lab (2-wheeled & 4-wheeled). The idea is to support different input sources (UDP, MQTT, joystick...) and allow either ...
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5
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Understanding Actor Pose vs. World Pose in Gazebo Sim with Trajectory Movement
I am using Gazebo Harmonic. Can anyone help me figure out why:
My actor’s pose does not change, even though the world pose changes
and the actor with a trajectory moves? I’m aware that, according to
...
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5
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Trajectories recording extremely minute values with Kinova Robot
I am trying to record the trajectories the robot takes when I exectue joint position based movements. However, the recorded trajectories have extremely minute values that the robot maybe is not able ...
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8
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Using a UI to manually control ground rover through MAVROS
I am currently working on making a ground rover move through a UI. My PixHawk model is PixHawk 6X using PX4 firmware. I have already connected it with MAVROS using this:
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0
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ROS2 communication between two devices not working
I am trying to establish two way communication between my robot (f1tenth setup) and my local PC, via the ROS_DOMAIN_ID.
river@convoy-0:~$ printenv | grep ROS
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9
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I'm having an issue with the TurtleBot3 Waffle Pi with OpenManipulator-X in Gazebo simulation using ROS1 Noetic
I send a goal to move_base with specific (x, y, theta) coordinates so that the robot approaches a target (e.g., a station with an ArUco marker) and stops facing it perpendicularly. The robot reaches ...
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8
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TurtleBot3 Waffle Pi with OpenManipulator slowly rotates after reaching goal in Gazebo [closed]
I'm having an issue with the TurtleBot3 Waffle Pi with OpenManipulator-X in Gazebo simulation using ROS1 Noetic.
I send a goal to move_base with specific (x, y, theta) coordinates so that the robot ...
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21
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Output of MPU6050 IMU not equaling one g
When my robot is standing even on a surface, the output of the IMU accelerometer is around:
acceloremeter_x: 1.0 m/s²
acceloremeter_y: 1.029 m/s²
acceloremeter_z: -9.213 m/s²
I assumed the norm of the ...
1
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0
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44
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DoF of a delta robot
I'm working on a uni project about a delta robot. I've been a bit stuck on calculating the DoF of the robot using the modified Grubler formula.
mobility coefficient = 6;
rigid bodies l = 11;
number ...
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6
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ros2 setup failed on MACOS with error Compatibility with CMake < 3.5 has been removed from CMake
installation https://docs.ros.org/en/jazzy/Installation/Alternatives/macOS-Development-Setup.html
MACOS: Sequoia 15.4.1
Build step:
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1
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17
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Visualising data from a docker ROS2 Humble stack on ROS2 Jazzy
I'm new to ROS2 so please forgive my nievity. I'm attempting to visualise data from a Docker humble stack on my computer, which is running Jazzy. The Docker stack is also being run from the same ...
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