RIOT-2026.04.01 "Rizzless Rizzlease 🥀" - Release Notes
RIOT is a multi-threading operating system which enables soft real-time
capabilities and comes with support for a range of devices that are typically
found in the Internet of Things: 8-bit and 16-bit microcontrollers as well as
light-weight 32-bit processors.
RIOT is based on the following design principles: energy-efficiency, soft
real-time capabilities, small memory footprint, modularity, and uniform API
access, independent of the underlying hardware (with partial POSIX compliance).
RIOT is developed by an international open-source community which is
independent of specific vendors (e.g. similarly to the Linux community) and is
licensed with a non-viral copyleft license (LGPLv2.1), which allows indirect
business models around the free open-source software platform provided by RIOT.
About this release
This is a bugfix release for RIOT 2026.04.
Please refer to the 2026.04 release notes for the new features and changes in that release.
In #22315, a bug was discovered that has been present since 2025.10, which caused non-docker build failures when using the release archive instead of cloning the repository.
This bug was fixed and required a new minor release.
Acknowledgements
We would like to thank all companies that provided us with hardware for porting
and testing RIOT. Further thanks go to companies and institutions that
directly sponsored development time. And finally, big thanks to all of you
contributing in so many different ways to make RIOT worthwhile!
More information
Discussions
- Join the RIOT Matrix room at: #riot-os:matrix.org
- Join the RIOT Forum at: forum.riot-os.org
- Follow us on Mastodon: floss.social/@RIOT_OS
License
- The code developed by the RIOT community is licensed under the GNU Lesser
General Public License (LGPL) version 2.1 as published by the Free Software
Foundation. - Some external sources and packages are published under a separate license.
All code files contain licensing information.