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RIOT - The friendly OS for IoT
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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 100+ boards based on AVR, MSP430, ESP8266, ESP32, MIPS, RISC-V, ARM7 and ARM Cortex-M
  • 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
  • Sigfox
  • LoRaWAN


  • You want to start the RIOT? Just follow our quickstart guide or try this tutorial. For specific toolchain installation, follow instructions in the getting started page.
  • The RIOT API itself can be built from the code using doxygen. The latest version of the documentation is uploaded daily to


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 shell script in RIOT/dist/tools/tapsetup called tapsetup which you can use to create a network of tap interfaces.


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 our contributing document.



  • 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:

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