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License: GPL v2 Chat on Matrix

This repository contains the source code of the c't-Bot simulator. c't-Bot and c't-Sim belong together and represent a robot project that was initiated by the magazine c't in 2006.

The project website can be found at All related documentation is available at here.

The repository here contains the source code of the original c't-Sim robot simulator from 2006. Each stable release of the code is tagged and the master branch always points to the latest one. The (experimental) development code can be found in branch development. Additional branches may exist for currently developed fixes or new features, use them on your own risk and bear in mind: if it breaks, you get to keep both pieces.

Feel free to fork from this repository, add your own extensions or improvements and create a pull request to get them integrated.


  • ct-Sim does not work on recent linux distributions like Fedora, RHEL 8 / CentOS 8 or Arch Linux. OpenJDK versions newer than Java 8 (1.8.x) also have problems on Linux and macOS. It's highly recommended to use ct-Sim with Java 8.
  • To enable additional warnings move file .settings/org.eclipse.jdt.core.prefs_warnings to .settings/org.eclipse.jdt.core.prefs.

Continuous integration tests

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