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2022-02-15 14:45:22 -0500 commented question C++ executable file not build

I don't think you would need .cpp in rosrun. As for the executable, what locations did you look for it?

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2022-02-14 21:47:41 -0500 commented question Making a turtlebot3 move with python script

Did you follow this document? Just publish /cmd_vel with Python instead of the joystick.

2022-02-14 21:06:15 -0500 asked a question ROS2 Equivalent for AdvertiseOptions

ROS2 Equivalent for AdvertiseOptions I am porting a ROS1 gazebo plugin that uses AdvertiseOptions to ROS2, but I don't k

2022-02-14 20:58:10 -0500 commented question Making a turtlebot3 move with python script

I think it should be the same steps but you need to connect to the turtlebot with ROS network first

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2021-01-06 21:48:14 -0500 edited question Moveit Group Parent Link

Moveit Group Parent Link I am trying to use moveit to do 3D navigation following this blog. I used the GitHub repo provi

2021-01-06 21:47:51 -0500 asked a question Moveit Group Parent Link

Moveit Group Parent Link I am trying to use moveit to do 3D navigation following this blog. I used the GitHub repo provi

2020-12-16 21:42:46 -0500 commented question ROS/ MoveIt! ERROR: Unable to identify any set of controllers that can actuate the specified joints

I am having the same problem now. I am wondering if you found a solution to that or not. I tried the command c++filt _ZT

2020-12-16 21:42:17 -0500 commented question ROS/ MoveIt! ERROR: Unable to identify any set of controllers that can actuate the specified joints

I am having the same problem now. I am wondering if you found a solution to that or not. I tried the command c++filt _ZT

2020-12-16 21:35:09 -0500 commented question rosdep init fails with a syntax error

I am wondering if this has anything to do with your OS since Foxy is primarily supported on Ubuntu 20.04

2020-12-06 17:26:55 -0500 marked best answer How to prevent ROS namespace from overwriting topic names?

I am now working on the simulation with multiple robots and I want to use namespaces to organize the nodes better. However, I am also trying some information exchange among robots so they are also subscribing to topics from others' namespaces.

Here is the part in my launch file I start the node send_follow_waypoints

<node pkg="uuv_control_utils" type="send_follow_waypoints.py" name="$(anon name)">
    <param name="uuv_name" value="$(arg uuv_name)" />
    <param name="follow_name" value="$(arg follow_name)" />
    <param name="max_forward_speed" value="$(arg max_forward_speed)" />
    <param name="heading_offset" value="$(arg heading_offset)" />
    <param name="use_fixed_heading" value="$(arg use_fixed_heading)" />
    <param name="radius_of_acceptance" value="$(arg radius_of_acceptance)" />
    <param name="start_time" value="$(arg start_time)" />
    <param name="x_shift" value="$(arg x_shift)" />
    <param name="y_shift" value="$(arg y_shift)" />
    <param name="z_shift" value="$(arg z_shift)" />
    <param name="success_rate" value="$(arg success_rate)" />
</node>

And here is my subscriber inside send_follow_waypoints.py:

rospy.Subscriber('/%s/pose_gt' % follow_name,
            Odometry,
            follow_pose_callback)

I want the robot with uuv_name to subscribe to the topic /follow_name/pose_gt, but if I add an ns="$(arg uuv_name)" tag to the node, it would try to subscribe to /uuv_name/follow_name/pose_gt. Is there some way to stop the namespaces from changing the topic names?

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2020-12-05 19:30:59 -0500 edited question How to prevent ROS namespace from overwriting topic names?

How to prevent ROS namespace from overwriting topic names? I am now working on the simulation with multiple robots and I

2020-12-05 19:30:32 -0500 edited question How to prevent ROS namespace from overwriting topic names?

How to prevent ROS namespace from overwriting topic names? I am now working on the simulation with multiple robots and I

2020-12-05 19:29:46 -0500 edited question How to prevent ROS namespace from overwriting topic names?

How to prevent ROS namespace from overwriting topic names? I am now working on the simulation with multiple robots and I

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2020-12-05 16:20:13 -0500 asked a question How to prevent ROS namespace from overwriting topic names?

How to prevent ROS namespace from overwriting topic names? I am now working on the simulation with multiple robots and I

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2020-10-06 22:56:55 -0500 asked a question Error when start gazebo

Error when start gazebo I just reinstalled my virtual machine and ros melodic. When I ran gazebo I got the following err

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2020-10-04 17:59:14 -0500 answered a question Cannot identify gazebo error

I found that the camera type should be changed to "depth". Now I am not seeing the error and the topics are published pr

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2020-10-04 17:34:38 -0500 commented question Cannot identify gazebo error

@Weasfas I am not sure if there is something wrong with the world. The world has been working fine until I changed the c

2020-10-04 17:32:04 -0500 edited question Cannot identify gazebo error

Cannot identify gazebo error I was trying to run a 3D simulation with a depth and point cloud camera and gazebo would no

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2020-10-03 18:48:04 -0500 asked a question Cannot identify gazebo error

Cannot identify gazebo error I was trying to run a 3D simulation with a depth and point cloud camera and gazebo would no

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2020-05-22 13:23:39 -0500 commented question TF lookup extrapolate into the future

I have already increased the transform_tolerance to 2.0 but it did not help. And my robot fails to meet the control loop

2020-05-22 00:41:36 -0500 asked a question TF lookup extrapolate into the future

TF lookup extrapolate into the future I am trying to implement the navigation stack on my robot but got the following er