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2019-04-27 06:56:51 -0500 | received badge | ● Famous Question (source) |
2019-01-25 11:47:37 -0500 | commented answer | Why no cmd_vel topic during ROS + Gazebo Turtlebot Simulation? Maybe it is because it is only a Gazebo simulation. I’m just happy to be able to control the robot and move on. :) |
2019-01-25 11:46:53 -0500 | commented answer | Why no cmd_vel topic during ROS + Gazebo Turtlebot Simulation? The revelation that cmd_vel is only a convention helped immensely. The strange thing on my system is that writing to cm |
2019-01-20 20:42:14 -0500 | received badge | ● Notable Question (source) |
2019-01-11 00:02:51 -0500 | marked best answer | Why no cmd_vel topic during ROS + Gazebo Turtlebot Simulation? I have been having a very difficult time trying to understand why my system does not have the cmd_vel topic. I am trying to get a ROS system running with Gazebo so that I can work through tutorials and learn ROS. I started with the ROS Development Studio (online) and it was great! But sooner or later one must be able to get ROS going on a local system. So I built a Ubuntu system and installed ROS + Gazebo, then installed Turtlebot including the simulator. It all works! I can launch a Turtlebot simulation then launch the Turtlebot_teleop package and I am able to move the robot around. But when I list the running topics cmd_vel is not one of them. These are the list of topics grep'd on "cmd": No /cmd_vel ! So I can't work through tutorials to drive the robot around. Besides, I just don't understand why it is not there but teleop works. Could someone tell me why I do not see the cmd_vel topic? System info: Ubuntu 16.04 ROS Kinetic Gazebo 7 (not sure exactly which version but it launches and runs) Installed Turtlebot based on Indigo install but replaced with kinetic. |
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2019-01-10 20:44:26 -0500 | received badge | ● Popular Question (source) |
2019-01-10 11:28:22 -0500 | asked a question | Why no cmd_vel topic during ROS + Gazebo Turtlebot Simulation? Why no cmd_vel topic during ROS + Gazebo Turtlebot Simulation? I have been having a very difficult time trying to unders |