Introduction books for ROS INDIGO
Hi there, I am pretty new to ROS and would like to have some books for introduction parts. I know there are plenty of tutorials in the net, but i just prefer books. I already found following book:...
View ArticleWhy is my callback function not called
I trying to understand why my subscriber isn't outputting anything.. It seems like, it doesn't get called, but it doesn't make sense why it doesn't... Anyone who could explain?? #include...
View ArticlewaitKey and ROS
How can i use Waitkey in ROS.. I have while loop which waits for a user input, and then goes to the next state.. Within i get video image using Image_transport. So my idea is to have cout << "Am...
View ArticleKeep running the function without restarting it?
I have this problem that i cannot make run my while(true) without it get restarted.. I think the problem occurs since in my main loop int main { ros::init(argc,argv, "loop"); loop(); ros::spin(); } In...
View ArticleSubcriber able to switch between multiple callback function
I have a class which contains a 2 callback function, and based on a boolean it determines which one to use.. The problem is that the state of the boolean get sets in the constructor, and main kept...
View ArticlecalcOpticalFlowPyrLK and goodFeaturesToTrack doesn't work properly
I trying to port some code i written in C++ non ROS into a Ros environment, which causing some problems.. The purpose of this code is to track the movement of a persons face, a bit like the...
View ArticleRos will not launch ROS_openTLD
I don't why.. I created a workspace cloned ROS_openTLD from https://github.com/Ronan0912/ros_opentld into /src/ source the setup.bash.. but for no reason is ROS not able to find it.. I mean.. it so...
View ArticleHas anyone installed Indigo on the rpi 2?
I got my rpi 2 yesterday and was wondering if the guide for installing indigo on the original rpi would work?
View ArticleHow to use robot_pose_ekf and other ROS Packages?
Hi there, I am super new to ROS. I have a decent amount of programming experience and have academic coursework under my belt in AI and robotics. I have also worked through the ROS tutorials. That...
View ArticlePID controller /pid_enable topic for multiple controllers
Hi all, I am using the PID package to run six pid controllers (So far) on a robot. I'm using the parameters in the launch file to differentiate between the different PID nodes, as described in the...
View ArticleGetting started with Arbotix python. Keeping it simple
Hello World, Good news everybody!! I'm new to robotics and I'm ready to get started. The thing is, I need a little help getting started. I recently bought six AX-12 servos, an Arbotix-M controller, a...
View ArticleCMake Error catkin_install_python.cmake
Hello Community, I am trying to run a simple Hello World cpp script on ROS indigo using Ubuntu 14.04 LTS. I followed the steps in the tutorials but when I do catkin_make the following errors appear....
View ArticleCallback for integer message
Hello Folks, i am just leanring roscpp and i want to re-write the [Simple Publisher and Subscriber](http://wiki.ros.org/ROS/Tutorials/WritingPublisherSubscriber(c%2B%2B)) Tutorial with an integer...
View Articlecatkin add LibSerial header
Hi all, i have written a little program which uses the LibSerial library for testing in cpp whithout ros. I compiled it with "gcc -o serialTest SerialTest.cpp -lserial" and tested it. But how can i...
View ArticleSave msg content in variable cpp
Hi folks, i try to read and save the current content of a message in a cpp opject. I can continuously read the message with a callback, but i need the content in my main-function. My msg contains four...
View Articlesensor_msgs - Can't build tutorial project
I am trying to pass images as messages in a simple ROS project. I'm a complete beginner in ROS and robotics. The tutorial I'm trying to follow is here:...
View ArticleUnsure about project nodes and communication between nodes
Hi! I'm pretty new to ROS (Robot Operating System). I've done quite a few tutorials and I'm starting to get a grasp of it. Right now, I'm looking to build my own little project to really get a better...
View ArticleWSL: Trouble running turtlesim_node
Hi, I get the following error when I'm trying to run the turtlesim_node in the beginner tutorial. I'm using ROS melodic on the Linux subsystem for Windows 10 and using tmux to run my multiple terminal...
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