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2022-03-23 18:52:08 -0500 commented question When to use rclcpp::spin or RCLCPP_COMPONENTS_REGISTER_NODE?

Waiting for an answer..

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2020-08-05 14:25:43 -0500 asked a question Is there any tutorial for simulating a robot arm in ROS2+Gazebo?

Is there any tutorial for simulating a robot arm in ROS2+Gazebo? I couldn't find an joint state controller ros plugins f

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2019-08-23 08:06:15 -0500 marked best answer how to install sound_play

Im using ros indigo. i tried this command "rosdep install sound_play". It says,

ERROR: Rosdep cannot find all required resources to answer your query
Missing resource sound_play
ROS path [0]=/opt/ros/indigo/share/ros
ROS path [1]=/opt/ros/indigo/share
ROS path [2]=/opt/ros/indigo/stacks

Im new to linux.

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2019-06-13 02:12:09 -0500 marked best answer Problem with building navigation stack

I am using ROS melodic on Ubuntu 18.04 in Nvidia Jetson Nano. I am trying to building navigation from the code in github. I get the following error.

[ 98%] Built target planner
In file included from /home/nano/ws/src/navigation/move_base/src/move_base.cpp:38:0:
/home/nano/ws/src/navigation/move_base/include/move_base/move_base.h:64:41: error: ‘move_base_msgs’ was not declared in this scope
   typedef actionlib::SimpleActionServer<move_base_msgs::MoveBaseAction> MoveBaseActionServer;
                                         ^~~~~~~~~~~~~~
/home/nano/ws/src/navigation/move_base/include/move_base/move_base.h:64:41: note: suggested alternative: ‘move_base_EXPORTS’
   typedef actionlib::SimpleActionServer<move_base_msgs::MoveBaseAction> MoveBaseActionServer;
                                         ^~~~~~~~~~~~~~
                                         move_base_EXPORTS
/home/nano/ws/src/navigation/move_base/include/move_base/move_base.h:64:71: error: template argument 1 is invalid
   typedef actionlib::SimpleActionServer<move_base_msgs::MoveBaseAction> MoveBaseActionServer;
                                                                       ^
/home/nano/ws/src/navigation/move_base/include/move_base/move_base.h:163:28: error: ‘move_base_msgs’ does not name a type; did you mean ‘move_base_EXPORTS’?
       void executeCb(const move_base_msgs::MoveBaseGoalConstPtr& move_base_goal);
                            ^~~~~~~~~~~~~~
                            move_base_EXPORTS
/home/nano/ws/src/navigation/move_base/include/move_base/move_base.h:163:64: error: expected unqualified-id before ‘&’ token
       void executeCb(const move_base_msgs::MoveBaseGoalConstPtr& move_base_goal);
                                                                ^
/home/nano/ws/src/navigation/move_base/include/move_base/move_base.h:163:64: error: expected ‘)’ before ‘&’ token
/home/nano/ws/src/navigation/move_base/include/move_base/move_base.h:163:64: error: expected ‘;’ at end of member declaration
/home/nano/ws/src/navigation/move_base/include/move_base/move_base.h:163:66: error: ‘move_base_goal’ does not name a type; did you mean ‘move_base_EXPORTS’?
       void executeCb(const move_base_msgs::MoveBaseGoalConstPtr& move_base_goal);
                                                                  ^~~~~~~~~~~~~~
                                                                  move_base_EXPORTS
In file included from /usr/include/boost/bind.hpp:22:0,
                 from /opt/ros/melodic/include/ros/publisher.h:35,
                 from /opt/ros/melodic/include/ros/node_handle.h:32,
                 from /opt/ros/melodic/include/ros/ros.h:45,
                 from /home/nano/ws/src/navigation/move_base/include/move_base/move_base.h:43,
                 from /home/nano/ws/src/navigation/move_base/src/move_base.cpp:38:
/usr/include/boost/bind/bind.hpp: In instantiation of ‘struct boost::_bi::result_traits<boost::_bi::unspecified, void (move_base::MoveBase::*)(...) &>’:
/usr/include/boost/bind/bind.hpp:1284:48:   required from ‘class boost::_bi::bind_t<boost::_bi::unspecified, void (move_base::MoveBase::*)(...) &, boost::_bi::list2<boost::_bi::value<move_base::MoveBase*>, boost::arg<1> > >’
/home/nano/ws/src/navigation/move_base/src/move_base.cpp:60:110:   required from here
/usr/include/boost/bind/bind.hpp:75:37: error: ‘void (move_base::MoveBase::*)(...) &’ is not a class, struct, or union type
     typedef typename F::result_type type;
                                     ^~~~
/home/nano/ws/src/navigation/move_base/src/move_base.cpp: In constructor ‘move_base::MoveBase::MoveBase(tf2_ros::Buffer&)’:
/home/nano/ws/src/navigation/move_base/src/move_base.cpp:60:118: error: new initializer expression list treated as compound expression [-fpermissive]
 s_ = new MoveBaseActionServer(ros::NodeHandle(), "move_base", boost::bind(&MoveBase::executeCb, this, _1), false);
                                                                                                                 ^
/home/nano/ws/src/navigation/move_base/src/move_base.cpp:95:44: error: ‘move_base_msgs’ was not declared in this scope
     action_goal_pub_ = action_nh.advertise<move_base_msgs::MoveBaseActionGoal>("goal", 1);
                                            ^~~~~~~~~~~~~~
/home/nano/ws/src/navigation/move_base/src/move_base.cpp:95:44: note: suggested alternative: ‘move_base_EXPORTS’
     action_goal_pub_ = action_nh.advertise<move_base_msgs::MoveBaseActionGoal>("goal", 1);
                                            ^~~~~~~~~~~~~~
                                            move_base_EXPORTS
/home/nano/ws/src/navigation/move_base/src/move_base.cpp:95:34: error: parse error ...
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2019-06-07 06:09:15 -0500 received badge  Notable Question (source)
2019-06-06 13:08:32 -0500 commented answer Problem with building navigation stack

I remember doing rosdep init and rosdep update during ros installation. Is this different from that? If so how do I do t

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2019-06-06 05:06:10 -0500 commented answer Problem with building navigation stack

I know that that command will work. I had added my CMakeLists.txt.

2019-06-06 05:05:33 -0500 edited question Problem with building navigation stack

Problem with building navigation stack I am using ROS melodic on Ubuntu 18.04 in Nvidia Jetson Nano. I am trying to buil

2019-06-05 12:57:02 -0500 asked a question Problem with building navigation stack

Problem with building navigation stack I am using ROS melodic on Ubuntu 18.04 in Nvidia Jetson Nano. I am trying to buil

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2019-05-20 05:41:01 -0500 marked best answer Problem with ROS2 installation

i am following this link to install ROS2 Crystal on my ubuntu 16.04. I already have ROS Kinetic installed on my machine. During this step . ~/ros2_install/ros2-linux/setup.bash, I get this warning:

[connext_cmake_module] Warning: The location at which Connext was found when the workspace was built [[/opt/rti.com/rti_connext_dds-5.3.1]] does not point to a valid directory, and the NDDSHOME environment variable has not been set. Support for Connext will not be available.

This is asking for RTI DDS installation. How do I make that use some other open source DDS implementation?

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2019-05-20 05:40:58 -0500 commented answer Problem with ROS2 installation

Cool. Thanks.

2019-05-20 05:15:55 -0500 received badge  Commentator
2019-05-20 05:15:55 -0500 commented answer Problem with ROS2 installation

My RMW_IMPLEMENTATION was not set. Even after setting it I get the same warning. I tried running the demo talker and lis

2019-05-20 00:50:36 -0500 asked a question Problem with ROS2 installation

Problem with ROS2 installation i am following this link to install ROS2 Crystal on my ubuntu 16.04. I already have ROS K

2019-05-18 12:26:58 -0500 commented question Using teb_local_planner with via_points and obstacle avoidance

Can you refer this video

2019-05-18 05:14:36 -0500 edited question Problem with ROS 2 crystal installation

Problem with ROS 2 crystal installation I am following this link to install ros2 crystal on my ubuntu xenial. I already

2019-05-18 05:14:34 -0500 edited question Problem with ROS 2 crystal installation

Problem with ROS 2 crysral installation I am following this link to install ros2 crystal on my ubuntu xenial. I already

2019-05-18 04:56:50 -0500 asked a question Problem with ROS 2 crystal installation

Problem with ROS 2 crysral installation I am following this link to install ros2 crystal on my ubuntu xenial. I already

2019-05-17 11:30:48 -0500 commented question Using teb_local_planner with via_points and obstacle avoidance

Create a waypoint based global planneroadmap_global_plannerr instead. And use DWA local planner.

2019-05-17 11:25:42 -0500 commented question Turtlebot2's amcl_pose seems very inaccurate.

How far is the /odom frame from the /map frame?

2019-05-17 11:25:21 -0500 answered a question Turtlebot2's amcl_pose seems very inaccurate.

How far is the /odom frame from the /map frame?

2019-05-15 00:48:18 -0500 answered a question trying to move from jetson tx2 to jetson nano ...so I am Getting trouble in moving from ros kinetic to ros melodic

I am using Jetson nano with ROS melodic. I had a error while installing April Tag package related to opencv. I solved it