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Josh Chen

Last seen: en dag ago Active since 2020

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  • Knowledgeable Level 3
  • 6 Month Streak
  • Revival Level 2
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Answered
Error occurs when executing 'rosinit'
Hello Ryo, Before running "rosinit", have you used "ROS Toolbox Preference" to setup the environment? In there, if there is any...

4 dagar ago | 0

Answered
ROS Toolbox read scan block ouput zero all the time.
Hi Zike, It does not matter if you have a "stop" or not in the Simulink model. When referring to the comment on the read-scan ...

11 dagar ago | 0

Answered
Error when trying to set the Path for python executable for ROS toolbox preferences
Hello Nabil, Sorry about the confusing error message, team is working on improving this error message. As for now, please try ...

14 dagar ago | 0

Answered
Fail to list ros2 topics when ubuntu publish topics with same ros_domain_id and same subnet.
Hi Jingyu, I hope you've found a solution to this issue. If not, please also feel free to also reach out to our techinical supp...

24 dagar ago | 0

Answered
Data from Simulink does not update ROS2 topic
Hello Renzo, When publishing messages with vector fields in Simulink, Simulink needs to know the length of valid data in those ...

ungefär en månad ago | 1

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Answered
Issue with libstdc++.so.6, when starting code generation.
Hello Mirhad, You may consider updating MATLAB to R2022b Update 2. This issue should be resolved after updating MATLAB. Besi...

ungefär 2 månader ago | 0

Answered
Issue in publishing ROS topic to another PC
Hello Kazuo, The environment variable configuration you shared looks correct to me. I suspect this may still have something to...

ungefär 2 månader ago | 0

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Answered
Error in Using ROS Topic
Hi Shivam, The topic "/gazebo/ModelState" contains only one "Pose" field, while the topic "/gazebo/ModelStates" that you are us...

2 månader ago | 0

Answered
ROS2 Subscriber Callback Function Arguments for Code Generation
Hello Michael, This is a known issue in code generation with ros2subscriber callback. Sorry about the inconvenience caused by t...

3 månader ago | 0

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Answered
Generated ROS node from Simulink, does not work on the target ROS device when launching it manually from Linux terminal without Simulink
Hi JF, Other quick things to try are: 1. Check whether the Gazebo world has been reset or not. Sometimes you may need to reset...

3 månader ago | 0

Answered
Unable to run the simulink on ROS device due to administrative privileges issue
Hello Sandesh, This is a suggested action instead of an error. It should not prevent you from generating a ROS node or deployin...

3 månader ago | 0

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Answered
How to make ROS subscribe block ensure that each message of a customized ROS topic is caught from Gazebo
Hi Hirak, If I understand correctly, you are running the Simulink controller through Simulink simulation instead of code gene...

3 månader ago | 0

Answered
Select Node name created by ROS Toolbox on Simulink at master connection
Hello Jesús, As you may've discovered, the name of ROS node created from a Simulink model is auto generated with the pattern as...

5 månader ago | 0

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Answered
How do I use a ros2 discovery server in matlab
Hi Samuel, I just tried this on my end and it works fine as shown below: sub3 was created with a node when "ROS_DISCOVERY_SE...

5 månader ago | 0

Answered
How to access instance of class in ROS2 subscriber callback?
Hello Kyösti, Using a single object to manage both data and callback for subscriber is feasible. In this case, subscriber callb...

6 månader ago | 0

Answered
ROS toolbox stuck on service call
Hi Kyösti, The code looks correct for me except "res" should probably be "response". But I don't think that is the culprit. I ...

6 månader ago | 0

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Answered
when i creat a ros2 node ,it dosn't work.why 'Input data can only contain ASCII characters' ?
Hello Xin, I tried the same command you posted here on my end and it successfully created a ROS 2 node. As Walter mentioned, t...

6 månader ago | 0

Answered
Incorrect image encoding from ROS and Raspicam
Hello Sebasian, Could you elaborate about what you mean by "VariableSize property from encoding arrey to rgb (1280x960x3)"? I a...

6 månader ago | 0

Answered
Compatibility ros2node with Coder Generation
Hello Michael, You are right. Code generation support for 'ros2node' starts at R2021b. You should be able to use this feature ...

9 månader ago | 0

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Answered
Questions about ros2 call service blocks in simulink
Hello Xiaochen, It is difficult to figure out the culprit from the screenshot of the model. However, I do have some troubleshoo...

9 månader ago | 0

Answered
ROS2: How to generate code without makefile execution using Matlab coder
Hello Marek, Thanks for bringing this to our attention! This is a bug in both ROS and ROS 2 MATLAB code generation. We are curr...

9 månader ago | 0

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Answered
Error in building custom ros messages
Hello Mustafa, Looking at the error message, it seems that the python virtual environment was not been created properly. Could ...

10 månader ago | 0

Answered
Creating Custom ROS2 message types for simulink
Hello Andre, When running "ros2 msg list", are you able to see the custom message you are trying to use? If not, you would need...

10 månader ago | 0

Answered
vision.blobanalysis used in ROS code generation does not support dynamicMemoryAllocation for AllVariableSizeArrays, but needed for ROS code gen
Hello Matthew, Since the "step" function does not want "unbounded" input, one idea that worth trying is to create an empty fixe...

12 månader ago | 0

Answered
Simulink Ros, code generation
Hello Nicolas, In R2019a, not all codes will be generated into the *_ert_rtw folder. Instead, they were packed in the *.tgz fil...

ungefär ett år ago | 0

Answered
WSL2/Docker container/ROS from Matlab in Win10
Hello @Goupil56, The key for enabling the communication between WSL2 ROS and MATLAB/Simulink is to make sure the environment va...

ungefär ett år ago | 0

Answered
Convert Struct to Pointcloud using ROS2
Hello Manuel, The function pointCloud takes 3-D coordinate points as input argument. However, the variable 'a' here in the scre...

mer än ett år ago | 0

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Answered
Simulink/ROS Publishing pose of a 7 DOF arm using moveit_msgs/MoveGroupActionGoal
Hello Hasan, In Simulink, each string is represented as an array of uint8 values. As so, when assigning string fields in a mess...

mer än ett år ago | 0

Answered
Generate custom ROS messages in Matlab R2021a running on MacOS 11.4 with CMake 3.20.5. Error: Could not find CMake in your system
Hello Sriharsha, This seems to be an issue with MATLAB custom LD_LIBRARY_PATH. To confirm this, could you please try running th...

mer än ett år ago | 1

| accepted

Answered
Publishing on a ROS Topic Simulink
Hello Hassan, In Simulink when creating a bus, it requires more information than MATLAB to lock down the message you want to se...

nästan 2 år ago | 3

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