EV3 Maze Solver

How to run

• Python server: npm start
• Visualization: cd react-app && npm run build followed by cd dist && serve -s -l 9902
• Robot: Execute the ev3/main.py file from the brick's file browser. Needs to be restarted everytime the python server is restarted.

Repo structure

Robot

The code for the Lego EV3 robot is in the ./ev3 directory. The robot receives the commands from the python server and notifies the server when a command is done (eg moving a forward).

Python server

The python server is responsible for

• Brigding communictation between CPEE and the EV3 robot
• Retrieving and storing information from the CPEE (stream points, model activity data)
• Exposing the stored data to the react visualization app

Visualization: React app

The React app uses vite and can display a current run of the robot or compare previous runs. The data for both current and previous runs is fetched from the python server.

This app expects to find the python server API exposed under https://lehre.bpm.in.tum.de/ports/9901/.

To access the app from outside, use the following port: https://lehre.bpm.in.tum.de/ports/9902.

Template for updating dist/index.html after running npm run build:

    <script type="module" crossorigin src="https://lehre.bpm.in.tum.de/~ge35diz/practicum/ev3_robot/react-app/dist/assets/index-<hash>.js"></script>
    <link rel="stylesheet" crossorigin href="https://lehre.bpm.in.tum.de/~ge35diz/practicum/ev3_robot/react-app/dist/assets/index-<hash>.css">

This is needed because otherwise the server will send requests to the wrong url (probably because of the port forwarding on the lehre server). Also all other dynamically needed resources needed for the app (eg the robot.png) are accessed through the lehre server.