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Josh Chen

Last seen: 5 days ago Active since 2020

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  • Knowledgeable Level 3
  • 6 Month Streak
  • Revival Level 2
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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 ...

6 days 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 ...

9 days 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...

19 days 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 ...

1 month 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...

1 month 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...

2 months 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 months 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...

2 months 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 months 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 months 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 months 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 months 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 months 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 months 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 months 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 months 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 months 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 months 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 months 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 months ago | 0

| accepted

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 months 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 months 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 months 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...

1 year 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...

1 year 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...

1 year 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...

1 year 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...

1 year ago | 1

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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...

2 years ago | 3

Answered
Fail to create a ROS publisher/ subcriber for individual project
Hi Van, Based on your reply, it did seem that you are missing custom message definition in MATLAB. So MATLAB has a set of prede...

2 years ago | 1

| accepted

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