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                 ZZZZZZZ     ZZZZZZ                                          
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     ZZZZZZZZZZZ               Z                                             

The friendly Operating System for IoT!

RIOT OS is an operating system for Internet of Things (IoT) devices. It is based on a microkernel and designed for

  • energy efficiency
  • hardware independent development
  • a high degree of modularity

Its features comprise

  • a preemptive, tickless scheduler with priorities
  • flexible memory managment
  • high resolution timers
  • virtual, long-term timers
  • Wiselib support (C++ algorithm library, including routing, clustering, timesync, localization, security and more algorithms)
  • IPv6
  • TCP and UDP
  • 6LoWPAN
  • RPL

Development Procedures

  1. Check if your code follows the If the code does not comply these style rules, your code will not be merged.

  2. Create a new branch in your own fork for every new feature or fix. Then create the pull request from this branch, once you completed your task (feature or fix). Every commit in this branch will be added to the pull request.

  3. The master branch should always be in a working state. The RIOT maintainers will create release tags based on this branch, whenever a milestone is completed.

  4. New features and fixes will always be submitted as pull requests. A pull request will be merged if the RIOT maintainers acknowledge the request. Before it will get merged, the pull request has to stay open long enough to discuss possible issues, but no longer than 30 days. The more extensive the changes in the pull request, the more time should be given for discussion.

  5. Comments on a pull request should be added to the request itself, and not to the commit.

  6. Only RIOT maintainers have commit rights to the main RIOT repository. However, even they have to create pull requests to submit their changes. A RIOT contributor cannot acknowledge his own pull request. All current RIOT maintainers are listed in the wiki.

  7. Keep commits to the point, e.g., don't add whitespace/typo fixes to other code changes. If changes are layered, layer the patches.

  8. Describe the technical detail of the change(s) as specific as possible.

Getting Started

Mailing Lists


  • All sources and binaries that have been developed at Freie Universität Berlin are licensed under the GNU Lesser General Public License version 2 as published by the Free Software Foundation.
  • Some external sources, especially files developed by SICS are published under a separate license.

All code files contain licensing information.

For more information, see the RIOT website: