ylh's profile - activity

My friend,you can also refer to this link : https://docs.ros.org/en/foxy/Guides/Launch-file-different-formats.html

My friend,you can also refer to this link,:https://docs.ros.org/en/foxy/Guides/Launch-file-different-formats.html

My friend,you can also refer to this link,:https://docs.ros.org/en/foxy/Guides/Launch-file-different-formats.html

My friend,you can also refer to this link,:https://docs.ros.org/en/foxy/Guides/Launch-file-different-formats.html

My friend,you can also refer to this link,:https://docs.ros.org/en/foxy/Guides/Launch-file-different-formats.html

My friend,you can also refer to this link,:https://docs.ros.org/en/foxy/Guides/Launch-file-different-formats.html

what is roboticsbackend ?I don't understand, sorry,friend, can you explain?

I have solved this problem with the help of friend ,Fetullah Atas ,and this tutorial： https://roboticsbackend.com/ros2-

How to start multiple Lidar in one file in ros2 environment Hello, friends. In ros1,Ｉcan start two lidar in a file,like

How to start multiple Lidar in one file in ros2 environment Hello, friends. In ros1,Ｉcan start two lidar in a file,like

I have solved this problem with the help of friend ,Fetullah Atas ,and this tutorial：https://roboticsbackend.com/ros2-l

How to start multiple Lidar in one file in ros2 environment Hello, friends. In ros1,Ｉcan start two lidar in a file,like

Ok, my friend, I'll try it

My friend, thank you very much for your reply, which is very helpful to me！

How to start multiple Lidar in one file in ros2 environment Hello, friends. In ros1,Ｉcan start two lidar in a file,like

How to visualize point cloud data of velodyne-16 with ros2? The environment：ros2-foxy I'm a newer to ros2 .I want to vi

Thank you for your reply, I will have a try another day.

I have found the reason! The original author said that this imu hardware_interface is secondary development, needs to us

Thanks for your reply! I get it what you said,but I need a [imu _sensor_controlle].(http://docs.ros.org/jade/api/imu_sen

Thanks for your reply.I have a try as what you said ,but those are the newest version.Maybe other reasons.

How to define the hardware interface of imu_sensor_controller in urdf? My robot need the imu_sensor_controller to simula

How to load urdf.xacro in ros-noetic? I trid two ways(way1 and way2) to load urdf ,it's all ok in ros-kinetic(ubuntn16.0

How to load urdf.xacro in ros-noetic? I trid two ways(way1 and way2) to load urdf ,it's all ok in ros-kinetic(ubuntn16.0

How to load urdf.xacro in ros-noetic? I trid two ways(way1 and way2) to load urdf ,it's all ok in ros-kinetic(ubuntn16.0

How to load urdf.xacro in ros-noetic? I trid two ways(way1 and way2) to load urdf ,it's all ok in ros-kinetic(ubuntn16.0

How to load urdf.xacro in ros-noetic? I trid two ways(way1 and way2) to load urdf ,it's all ok in ros-kinetic(ubuntn16.0

How to load urdf.xacro in ros-noetic? I trid two ways(way1 and way2) to load urdf ,it's all ok in ros-kinetic(ubuntn16.0

I am a novice, the principle of the error is not clear, so I have no other solution.

I want to intall rosbash in ros-noetic ,but met a problem:

ylh@ylh:~$ sudo apt install rosbash
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 rosbash : Depends: catkin but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

ylh@ylh:~$ sudo apt install catkin
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 catkin : Depends: python3-catkin-pkg (>= 0.4.14-2) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

ylh@ylh:~$ sudo apt install python3-catkin-pkg
Reading package lists... Done
Building dependency tree       
Reading state information... Done
python3-catkin-pkg is already the newest version (0.4.20-100).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

ylh@ylh:~$ sudo apt install catkin
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 catkin : Depends: python3-catkin-pkg (>= 0.4.14-2) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

ylh@ylh:~$

I feel like it's a dead loop：the installation of catkin-python3-catkin-pkg-catkin .... how to solve the problem?

Thank you very much if you could tell me how to do it.