laser scan topic
i install ros indigo desktop full and Turtlebot2 Ubuntu Package . when i do `$rostopic list` i cant find `/laser/scan` topic . there's something like additional installation or other name of laser scan...
View ArticleImportError: dynamic module does not define init function (PyInit__tf2)
I'm running Python 2.7 and when I try to import tf I'm getting the error as mentioned in the question. This is pretty confusing because according to the...
View ArticleModeling tether (cable) in Gazebo
Hello All, I need your directions on how to model a tether in Gazebo. Just to give you a brief of my project: I am working on the tethered quadcopter estimation and control. I am currently using the...
View ArticleCamera for Turtlebot 2 with Skeleton Tracking (2018)
Hi All, I am new to ROS and now exploring Turtlebot 2 and I would like to add-in the skeleton tracking features for my Turtlebot. After doing some web searching, I found that the skeleton tracking...
View ArticleImplementation of a* algorithm on turtlebot simulation
Hello, I am working on Ubuntu 14.04 and ROS Indigo. I am trying to implement relaxed a* algorithm as given in [this](https://www.youtube.com/watch?v=t4A_niNlDdg) tutorial. I am new to ROS and I dont...
View ArticleImplementation of relaxed a* on turtlebot simulation
Hello, I am working on Ubuntu 14.04 and ROS Indigo. I am trying to implement relaxed a* algorithm as given in [this](https://www.youtube.com/watch?v=t4A_niNlDdg) tutorial. I am new to ROS and I dont...
View ArticleHow to use cartographer with custom maps in gazebo?
I have installed cartographer. I hcould previously use gmapping for on the fly slam and autonomous navigation using turtlebot and a gazebo simulated environment. I followed the following link to do...
View ArticleHow to make a wall following using a rotating 2d laser scanner?
Hi, I have a mobile robot that works with ackermann steering wheel and has a rotating laser scanner on it. Now,I can find the distance and angle of the nearest obstacle using 2d laser scanner. How can...
View Articlepublishing &subscribing at the same node (no callback)
I'm trying to publish and subscribe in a package video_stream_opencv I have used Publisher test_pub to publish a message to another package (turtlebot pkg) and it worked fine. However when I try to...
View ArticleSome problems about the simulation of Kinova
Hello! I have some problems about the simulation of Kinova.I use it on ROS indigo in Ubuntu14.04. When I follow the tutorial for simulation, *** roslaunch j2n6s300_moveit_config...
View Articlerobot_upstart: nodes don't work well
I use robot_upstart to start the robot.In the startup.launch file ,I launch only one node which I called `myrobot_node` . Here is the node content.....
View Articledepth_image_proc for TYPE_8UC1 stereo images
Hi there, I found this cool package to process a disparity map, I got from a stereo camera pair, and compute a point_cloud:...
View Articletf frames position odomotry
Hi all, I am trying to get the position of my robot based on odometry, so I have two encoders that are connected to the front wheel. I am trying to follow this REP...
View ArticleIs it possible to install ROS Indigo on an RPi3 using Ubuntu Mate 16.04?
Hello all, Is it possible to install ROS Indigo on an RPi3 using Ubuntu Mate 16.04? If yes then please recommend any tutorial. Thank you
View ArticleSDF readFile not parsing world file
I am using ROS Indigo with Ubuntu 14.04. I need to parse the elements of a simple_environment.world file using `sdf::readFile`. The simple_environment.world file is as follows:...
View ArticleProblems with Navigation Stack
We have a custom 2 wheel robot using Pololu Motor Shields, with ROS_arduino_bridge to convert odometry ticks into quaternion and publishing to /odom. We also use a Hokuyo Laser Scanner. First question...
View Articleimage stream using camera
Hello guys, My question might seem easy for many since i am still fresh in Ros and Opencv. I am following the tutorials provided on Ros Website. I am going through the tutorial ''Converting between ROS...
View ArticleGmapping and Navigation Stack
Can Gmapping alongside with Nav Stack be used for navigating the robot while avoiding obstacles? If so, is there any source code that can make life easier? thanks
View ArticleHow to parse String in Simulink/MATLAB and ROS
Hi to all, I would like to be able to read my */mobile_robot/io* topic which has this output: data: 1517480481.375425333,0,0,0,0,1514,3307,0,0,0,0,0,0,0,0,0,1,1,0,1,0,1,1,0,0,0,0,0,0,0,0,6629 ---...
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