Trending 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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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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Colcon doesn't build subfolders
I'm building a ros2 (jazzy) python package with the following structure:
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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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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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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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2
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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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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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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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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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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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ROS2 Humble with SLAM, map not updating
I never had used ROS before, and, for a project, I was given a ROS-based robot (Clearpath Robotics, some years old). I upgraded it rom ROS1 to ROS2 Humble, and I added a LiDAR, Nav2 and trying with ...
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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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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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bt_navigator fails when executing action callback: "send_goal failed"
I'am working with ROS2 Foxy on a Ubuntu 20.04.
I'm having a problem when sending a 2D Goal pose:
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