micro-ROS / micro-ROS/micro-ROS-demos

No access to uROS topics in another terminal

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Dominant language
C
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Forks
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Description

## Issue template

- Hardware description: Windows 11, Docker inside VS Code with ROS2
- OS: Linux
- Installation type: Installed though [first_application_linux](https://micro.ros.org/docs/tutorials/core/first_application_linux/)
- Version or commit hash: humble

#### Steps to reproduce the issue

I followed the [tutorial](https://docs.ros.org/en/humble/How-To-Guides/Setup-ROS-2-with-VSCode-and-Docker-Container.html) with modified files to make in work on Windows 11.
VS Code configuration:
Dockerfile
```
FROM osrf/ros:humble-desktop
ARG USERNAME=Jakub
ARG USER_UID=1000
ARG USER_GID=$USER_UID

# Create the user
RUN groupadd --gid $USER_GID $USERNAME \
&& useradd --uid $USER_UID --gid $USER_GID -m $USERNAME \
#
# [Optional] Add sudo support. Omit if you don't need to install software after connecting.
&& apt-get update \
&& apt-get install -y sudo \
&& echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME \
&& chmod 0440 /etc/sudoers.d/$USERNAME
RUN apt-get update && apt-get upgrade -y
RUN apt-get install -y python3-pip
ENV SHELL /bin/bash

# ********************************************************
# * Anything else you want to do like clean up goes here *
# ********************************************************

# [Optional] Set the default user. Omit if you want to keep the default as root.
USER $USERNAME
CMD ["/bin/bash"]
```
devcontainer.json
```
{
"name": "ROS 2 Development Container",
"privileged": true,
"remoteUser": "Jakub",
"build": {
"dockerfile": "Dockerfile",
"args": {
"USERNAME": "Jakub"
}
},
"workspaceFolder": "/home/ws",
"workspaceMount": "source=${localWorkspaceFolder},target=/home/ws/src,type=bind",
"customizations": {
"vscode": {
"extensions":[
"ms-vscode.cpptools",
"ms-vscode.cpptools-themes",
"twxs.cmake",
"donjayamanne.python-extension-pack",
"eamodio.gitlens",
"ms-iot.vscode-ros"
]
}
},
"containerEnv": {
"ROS_LOCALHOST_ONLY": "1",
"ROS_DOMAIN_ID": "42"
},
"remoteEnv": {
"DISPLAY": "host.docker.internal:0"
},
"runArgs": [
"-e", "DISPLAY=${env:DISPLAY}",
"--gpus=all"
],
"mounts": [
"source=${localWorkspaceFolder}/../cache/ROS_DISTRO/build,target=/home/ws/build,type=bind",
"source=${localWorkspaceFolder}/../cache/ROS_DISTRO/install,target=/home/ws/install,type=bind",
"source=${localWorkspaceFolder}/../cache/ROS_DISTRO/log,target=/home/ws/log,type=bind"
],
"postCreateCommand": "sudo rosdep update && sudo rosdep install --from-paths src --ignore-src -y && sudo chown -R Jakub /home/ws/"
}
```

Then inside the docker I followed the [tutorial](https://micro.ros.org/docs/tutorials/core/first_application_linux/). I try to run:
First terminal:
```
source /opt/ros/$ROS_DISTRO/setup.bash
source install/local_setup.bash
ros2 run micro_ros_agent micro_ros_agent udp4 --port 8888
```
Second terminal:
```
source /opt/ros/$ROS_DISTRO/setup.bash
source install/local_setup.bash

# Use RMW Micro XRCE-DDS implementation
export RMW_IMPLEMENTATION=rmw_microxrcedds

# Run a micro-ROS node
ros2 run micro_ros_demos_rclc ping_pong
```
Third terminal:
```
source /opt/ros/$ROS_DISTRO/setup.bash
source install/local_setup.bash
ros2 topic list
```
#### Expected behavior
In the third topic I should be able to see topic named `/microROS/pong`.
#### Actual behavior
There are only two topics:
```
/parameter_events
/rosout
```
#### Additional information
When I try to run `rviz2` its working correctly, I am able to see topics in every terminal.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the Dockerfile and devcontainer.json, then reproduce the three-terminal setup from the linked first_application_linux tutorial. Compare the ROS_LOCALHOST_ONLY and ROS_DOMAIN_ID settings with the agent and ping_pong commands, and verify the result with ros2 topic list. Done means /microROS/pong is visible from the third terminal.

Written by the indexing model from the issue text.

Assessment

Tech stack
c, docker, linux
Domain
devops, distributed-systems, networking, robotics
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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