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Marc Poulhiès 961056548b initial work for uDMA + SPI 5 years ago
boards initial work for uDMA + SPI 4 years ago
core initial work for uDMA + SPI 4 years ago
cpu initial work for uDMA + SPI 4 years ago
dist initial work for uDMA + SPI 4 years ago
doc/doxygen doc: introduce memtitle class 4 years ago
drivers initial work for uDMA + SPI 4 years ago
examples initial work for uDMA + SPI 4 years ago
makefiles initial work for uDMA + SPI 4 years ago
pkg initial work for uDMA + SPI 4 years ago
sys initial work for uDMA + SPI 4 years ago
tests initial work for uDMA + SPI 4 years ago
.drone.yml drone: adjust path to 5 years ago
.gitattributes git: handle patch files as binary 6 years ago
.gitignore dist/tools: add 4 years ago
.mailmap mailmap: add missing mail address of mine 4 years ago
.murdock murdock: enable dlcache 4 years ago Update 7 years ago
Jenkinsfile Jenkins: add git-cache init before build 4 years ago
LICENSE * updated LICENSE file from GPL to LPGL 8 years ago
Makefile make: fix link to quickstart guide 4 years ago
Makefile.base Merge pull request #6780 from kaspar030/add_submodules 4 years ago
Makefile.dep Merge pull request #5793 from OTAkeys/pr/can_stack 4 years ago
Makefile.include dist/tools: add 4 years ago README: update boards support information 4 years ago
Vagrantfile doc: update getting started link in 5 years ago
doc.txt doc: create additional group for utils 4 years ago
release-notes.txt RELEASE 2017.04 4 years ago
uncrustify-riot.cfg stm32f2: add initial support for stm32f2 6 years ago

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The friendly Operating System for IoT!

RIOT is a real-time multi-threading operating system that supports a range of devices that are typically found in the Internet of Things (IoT): 8-bit, 16-bit and 32-bit microcontrollers.

RIOT is based on the following design principles: energy-efficiency, real-time capabilities, small memory footprint, modularity, and uniform API access, independent of the underlying hardware (this API offers 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). RIOT is licensed with LGPLv2.1, a copyleft license which fosters indirect business models around the free open-source software platform provided by RIOT, e.g. it is possible to link closed-source code with the LGPL code.


RIOT is based on a microkernel architecture, and provides features including, but not limited to:

  • a preemptive, tickless scheduler with priorities
  • flexible memory management
  • high resolution, long-term timers
  • support for AVR, MSP430, MIPS, ARM7, and ARM Cortex-M on over 80 boards
  • the native port allows to run RIOT as-is on Linux, BSD, and MacOS. Multiple instances of RIOT running on a single machine can also be interconnected via a simple virtual Ethernet bridge
  • IPv6
  • 6LoWPAN (RFC4944, RFC6282, and RFC6775)
  • UDP
  • RPL (storing mode, P2P mode)
  • CoAP
  • CCN-Lite



  • With latest GCC version (>= 6) platforms based on some ARM platforms will raise some warnings, leading to a failing build (see As a workaround, you can compile with warnings not being treated as errors: WERROR=0 make


If you compile RIOT for the native cpu and include the netdev_tap module, you can specify a network interface like this: PORT=tap0 make term


There is a shellscript in RIOT/dist/tools/tapsetup called tapsetup which you can use to create a network of tap interfaces.

USAGE To create a bridge and two (or count at your option) tap interfaces:

./dist/tools/tapsetup/tapsetup [-c [<count>]]


To contribute something to RIOT, please refer to the development procedures and read all notes for best practice.



  • Most of 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, especially files developed by SICS are published under a separate license.

All code files contain licensing information.

For more information, see the RIOT website: