ros_web_gui is a package for visualizing the available ROS nodes, topics, parameters and service calls in a web browser. It provides much of the functionality that is also available with the ROS command line tools and rqt_graph, but with a graphical user interface. When running the ros_web_gui, a flask-based webserver will be started that can be accessed on port 5000.
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First, you should install ros on your machine. It is heavily recommened to use Ubuntu 20.04 or higher as ros-noetic is the first version with support for python3.
After installing ROS, you can install ros_web_gui via pip:
pip install ros_web_gui
When using the package from Github, you need the python packages pygraphviz, pyyaml and flask. So you can set up a conda env or virtual environment with
conda install flask pydot pyyaml rosdep
OR
pip install flask pydot pyyaml rosdep
After this, you should be ready to use the ros_web_gui.
When ros_web_gui was installed via pip, you can simply type ros_web_gui in the terminal.
When you checked out the repository you can run scripts/run_flask.sh. Then, go to your browser and open http://localhost:5000.
For trying out ros_web_gui, you can also run the scripts/run_ros.sh script which will
start a roscore together with a simple publisher and a subscriber for testing purposes.