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Apache NuttX^®

Apache NuttX is a free and open-source (FOSS) real-time operating system (RTOS)

With an emphasis on standards compliance and small footprint. Scalable from 8-bit to 64-bit microcontroller environments, the primary governing standards in NuttX are POSIX and ANSI standards. Additional standard APIs from Unix and other common RTOS's (such as VxWorks) are adopted for functionality not available under these standards, or for functionality that is not appropriate for deeply-embedded environments (such as fork()).

Get NuttX

Documentation

Key Features

A real-time operating system designed for embedded systems

15+ CPU Architectures

Runs on ARM, RISC-V, x86, Xtensa, and more. Supports multiple CPU architectures and hardware platforms.

300+ Hardware Boards

Extensive board support from popular development kits to custom hardware.

1500+ Configuration Templates

Pre-configured builds for rapid prototyping and production deployment.

Open Community

Developed and maintained by an active open-source community.

Documentation

Complete guides, security information, and research papers

Full Documentation

Complete API reference, user guides, and developer documentation for Apache NuttX RTOS.

Security Documentation

Security guidelines, best practices, and vulnerability reporting information.

Scientific Papers & Articles

Research papers, technical articles, and publications about Apache NuttX.

Technical Structure

Access source code, releases, and project repositories

Release packages are available for download. We use three primary GIT repositories to develop the project: RTOS, Applications, and Website. Documentation is part of the RTOS repository and then built and hosted online.

Release Packages

Download official Apache NuttX releases with verified signatures and checksums.

RTOS Repository

Core RTOS code, kernel, drivers, and documentation sources.

Applications Repository

Sample applications, examples, and utilities for NuttX.

Website Repository

Source code for the Apache NuttX project website.

Video Tutorials

Step-by-step video guides and workshops on YouTube.

Code Examples

Browse hundreds of sample applications and code examples.

Try NuttX Shell

Experience NuttX POSIX-compliant shell environment. Click to launch the interactive WebAssembly demo.

NuttShell (NSH)

NuttShell (NSH) NuttX-12.4.0
nsh> █

Launch Interactive Demo

Join the Apache NuttX Community

NuttX is developed and maintained by an international group of volunteers from all around the world. We welcome developers of all skill levels to contribute to the project. View our full contributor list on GitHub.

Connect With Us

Mailing List (Main)

Discord

Hackster

YouTube

NuttX International Workshop 2026

October 11-14, 2026

Hilton Glasgow, Scotland

Join us at Community Over Code Glasgow 2026 for the NuttX International Workshop. Four in-person days of sessions focusing on Search, Big Data, IoT, Community, and more.

Community Over Code NuttX Events