Questions tagged [c++]
C++ is a compiled general-purpose programming language that adds object-oriented features and other enhancements to the C language. It is popular for both embedded (including robotics) and PC software development.
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Installing ros2 on ubuntu 23.04
Recently, I wanted to try installing ros2 on ubuntu 23.04 or later versions. How can I do it?
Thanks in advance
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How do you change a ROS2 WallTimer period after initialization?
Is there a way in ROS2 to use the ROS1 WallTimer function setPeriod? I'm trying to change the timer's period in runtime in my C++ node. Currently I cancel the ...
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Who has gotten WiringPi working in a ROS 2 C++ node? Want to control GPIO on Raspberry Pi 4 running Ubuntu 22
What I've tried and works to know the WiringPi library is working on my Raspberry Pi 4.
g++ compiling a test cpp script using <...
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Clarification on ROS2 argument types for srv/sub callbacks
I need some clarifications on the type of arguments to use in callbacks for service and subscriptions in C++. I’m considering both service input and subscriptions, because, from my understanding, what ...
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error: no type named ‘type’ in ‘struct std::enable_if<false, void>’ when calling rclcpp::create_timer()
I am trying to convert a piece of code written in ROS1 to ROS2. I am having trouble with the following line, which instantiates a ros:::Timer object:
in ROS1:
...
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How to convert the kittti dataset into ros2 bags?
How to convert the kitti dataset into ros2 bags, or is possible to download it already converted?
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Peek at the message queue for a ROS2 topic subscriber in a callback
I'm sure this facility was in ROS1 (although this post suggests it wasn't) but I cannot find it in ROS2. Basically in my subscription callback I want something like this pseudocode:
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Couldn't find executable named microstrain_mips_node
I installed ROS microstrain_mips using git clone in my workspace. Here is the Wiki page of the package. However, my current ROS ...
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How to use libSegFault with ROS node(let)s?
I'm trying to debug a segmentation fault on a ROS nodelet. I've tried to use libSegFault by adding the following lines to CMakeLists.txt:
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- 1,353
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MA57 Installation for Ipopt C++ library (x86_64, Ubuntu 9.4.0-1ubuntu1~20.04.2)
I've been working with Ipopt C++ library optimizer regarding trajectory optimizing tasks. By default the ipopt c++ uses MA27 solver (which is free for usage). I've found out that the best Licensed ...
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Subscriber in python to std_msgs.msg.Float32 crashes when the maximum float-32bits is sent
Setup:
a publisher in c++ of std_msgs/msg/Float32 sends the maximum float-32bits (using std::numeric_limits::max())
a subcriber in c++ to the topic above works just fine
a subcriber in python to the ...
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ROS2 node crashes abruptly
I have a legacy code in ROS1 that has the following code
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colorize area of point cloud on a 2D image
I am projecting a 3D Point Cloud on a 2D image incoming as ROS 2 messages. Now, I want to fill the gaps between pixels from the point cloud, so that I can see an area, instead of single pixels and ...
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ROS 2 - Poincloud2 message drop when trying to display in RVIZ2
I want to send a dummy PointCloud2 message to be visualized with RVIZ2, but when I try to subscribe to the pointCloud2 message, I received the following error :
[INFO] [1698326059.380456033] [rviz]: ...
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How to improve NodeHandle build and execution errors
Raspberry Pi 4, Lubuntu20.04, ROS1-noetic
Please help me because I am getting an error with NodeHandle
My program is below
(Some Japanese is mixed in)
The publish node will be as follows
https://...
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how to visualize the sensor data!
now I am making the node for my custom lidar.
the struct of this lidar pointcloud is
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stamp error with lidar
This is a problem that occurred while connecting and using the YDLIDAR X2 lidar sensor to the Raspberry Pi.
https://github.com/YDLIDAR/ydlidar_ros_driver
I use this package.
it worked normally on ...
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How to set planning frame in MoveIt 2
I have a custom MoveIt 2 package for a UR5e robot. While planning and executing the movement, I noticed weird movements where the robot didn't seem to move as expected. I noticed that ...
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Associate two executors for a single node
I am running ROS2 Humble Hawksbill, I have a requirement where in I need to associate two executors StaticSingleThreadedExecutors for a lifecycle single node. I ...
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linking .so files to ros2 package
Hello Im trying to write a client node using ros2 humble hawksbill distribution.
For the node Im using a shared library for my depth camera.
I have linked the .so file as I would normally do in my ...
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Ipopt error: malloc(): invalid size (unsorted) Aborted (core dumped)
I'm working with Ipopt C++ library (https://github.com/coin-or/Ipopt).
Planning to work on optimization of trajectories soon, but for now I'm practicing on the simple tasks.
In particular I've been ...
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How to make the connection of dynamixel become modular by using ros2 control hardware interface
I'm trying to make the robot that using dynamixels to control the movement of the joint. One of the application is that when one leg of the robot is disconnected, when I connect it again the software ...
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Camera pose estimation problem
I am creating a Pick and Place program and need help with pose estimation. I am broadcasting on RViz the coordinates based on my YOLO detection and camera. Below is my broadcasting node.
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Transform PointCloud message
I am receiving a sensor_msgs::msg::PointCloud (base_link frame) in my callback. I want to transform this PointCloud to the camera frame, so that I can do a ...
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Where are the signatures to callbacks such as this->client_->async_send_request( request, callback );
Sorry if this is dumb question I am new to C++
In node member functions such as:
this->client_->async_send_request(request, callback);
Where are the signatures to the callback functions ...
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Segmentation fault in cv::findContours call
I am struggling to debug a segmentation fault. Any help is appreciated! The node just crashes whenever I launch it and following is the seg fault I am getting when running through gdb:
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C++ can not build simple test program after update (Ubuntu 22.04/ROS 2 Rolling)
I just updated my Ubuntu 22.04 installation with ROS 2 rolling on it and now when I try to rebuild my ROS packages I get an error message that it can't compile a simple test program:
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Is it bad practice to declare the node as a global variable to call a service from an external callback?
I want to call a service SendError from a registered callback from an external library. The only way I see I can do this is by having the node declared as a global ...
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Not getting the correct response from the controller serial communication
I am trying to communicate with a Roboteq FBL2360TE brushless motor controller using serial communication, according with the controller's user manual if I send a ...
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node crashes when subscribe to /image_raw topic
I am trying to consolidate a few nodes into a single process using nodelets. I have a ObjectDetectionNodelet that has a subscriber that subscribes to the raw image ...
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waitForTransform kills node after changing static tf
I am new to programming and robotics and need help solving a problem i just can't solve. I am working on an art project with three ROS robots built by Wheeltec. (https://community.robotshop.com/robots/...
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Could I create multi dynamic_reconfigure in one package in one CMakeList？
I have two *.cfg files, each one working with its executable process.
The CMakeLists:
...
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Using TensorFlow in ROS2
I'm trying to add gesture recognition capabilities in my ros2 humble C++ package, and I started out with trying to use the TensorFlow C++ API. However, I am unable to install TensorFlow for my ROS2 ...
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How to deserialize ROS messages from Bag to ROS defined types in C++?
I want to deserialize messages from a Bag file and publishing part of their contents with ROS for further processing.
I read a bagfile with the ROS C++ API. I know exactly the content (topic names and ...
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ROS node reading from bag not exiting correctly
I need a C++ script which can read through bags and do some processing, basically the structure is going to be
...
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IMU sensor Vectornav VN100 driver doesn't post any INS messages
I've already posted the same question on the GitHub page of the VectorNAV driver: github.com/dawonn/vectornav/issues/128 But no luck, noone gets back to me, looks like the branch isn't in much support ...
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fatal error: #include "rclcpp/rclcpp.hpp" no such file or directory
I have a Raspberry Pi 4 with Ubuntu 22.04 and ROS 2 Iron Irwini, I have been able to run the tutorials, but when I run a ultrasonic ranger program I get fatal error ...
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128
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Dynamically creating publishers in ROS2 Humble
I am pretty new to ROS and would like to get some insight into if what I am creating is good and/or viable.
The system that I am making has a Publisher Node and a unknown number of Listener nodes (the ...
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Linking wiringPi Library with ROS2 service (serial) through CmakeLists.txt
I have a ROS2 package where I want a client to ask for a location, and the server sends coordinates back over ethernet that it's gotten from a GPS board which connects to my raspberry pi via serial.
I'...
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Build ROS code cpp without Catkin Package
Hello Community,
So I have been working with ROS lately, it was really easy testing code in python where I just had to import rospy to work with ROS as I wished. I would then execute my programs with $...
Lilipop
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How to resolve 'nullptr not declared in this scope' compiling error in Ros_lib blink example and other ros_lib examples Ubuntu 20.04 with ROS Noetic?
I am new to ros and I am using virtual machine with Ubuntu 20.04 and ros neotic in it. I have installed rosserial arduino package step by step from this.
After this I open ros_lib blink example and it ...
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How to detect the position in a linear actuator?
I was planning on 3D printing my own 30 cm stroke length 3D printed linear actuator and I don't know how I could read its position, or tell it to go say to 16.5 cm. I used this video, 3D Printed ...
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Where can I find an example of a C++ ROS 2 rqt plugin?
So far, I've only found ROS 2 rqt plugins ported over from ROS 1 that were written in Python. The docs (https://docs.ros.org/en/rolling/Concepts/About-RQt.html) mention writing custom plugins in both ...
Tupinambis
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Subscriber callback inside class not recognized C++
I have created a class that contains a ROS subscriber and the callback function. I have done this following the ROS tutorial and according to other answers that I have found (for example here).
I have ...
DuffRumkins
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Where do I find detailed information about the building of programs using boost etc. with the intention of configuring my own API 'protocols'?
I'm brand new to programming in c++ and I'm exploring all the deepest interesting parts on my own, I'm very interested in learning about API programming and how to configure different applications ...
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nodelet: can't add argument to constructor
I am writing a ROS nodelet in which I have a GetInstance() method. I am trying to parse a string argument and it's throwing me the error. Can someone point out how this error can be fixed?? Any help ...
robo_ninja
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How to Access Robot Fields Inside a Webots-ROS2 Plugin?
I'm running Webots R2023a where I have a robot node marked as Supervisor in Webots world (*.wbt file) to be controlled by an external node in ROS2 network. When writing a webots-ros2 plugin, I'm faced ...
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Drive to point PID doesn’t work properly
This is my first post here. I am trying to get a robot I’m working on to drive to a point via a PID controller. My code works fine if the point is in front of the robot, but completely falls apart if ...
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code_coverage for ROS usage
I am new in ROS and I apologize if the question might be simple or common sense.
I am trying to use this package (code_coverage) for measuring code coverage for ROS package but unfortunately no ...
anya
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sensor_msgs::PointCLoud empty in Callback but rostopic echo gives values
Hello, I want to work with a sensor_msgs::PointCloud I am provided with by a laser scanner. I subscribed to the topic /riegl3d and the Callback is executed but the PointCloud is empty. For example the ...
Sofie