NuttX
Real-time operating system
From Wikipedia, the free encyclopedia
Apache NuttX is a free and open-source real-time operating system (RTOS) with an emphasis on technical standards compliance and on having a small footprint. It is scalable from 8-bit to 64-bit microcontroller environments.[2][3] The main governing standards in NuttX are from the Portable Operating System Interface (POSIX) and the American National Standards Institute (ANSI)[4]. Further standard application programming interfaces (APIs) from Unix and other common RTOSes (such as VxWorks) are adopted for functions unavailable under these standards,[citation needed] or inappropriate for deeply embedded environments, such as the fork() system call.[citation needed]
| Apache NuttX | |
|---|---|
 Modern vector logo of Apache NuttX RTOS | |
| Developer | Apache Software Foundation |
| Written in | C, C++, assembly |
| OS family | POSIX |
| Working state | Current |
| Source model | Open source |
| Initial release | 2007 |
| Latest release | 12.13.0 / April 2, 2026 [1] |
| Repository | |
| Marketing target | Embedded systems |
| Supported platforms | ARM, AVR, AVR32, HCS12, LM32, MIPS, RISC-V, OpenRISC, SuperH, Xtensa, x86, x86-64, Z80 |
| Kernel type | Real-time monolithic kernel |
| License | Apache License 2.0 |
| Official website | nuttx |
NuttX was initially released in 2007 under the permissive BSD license.[5] In December 2019, it began incubation at the Apache Software Foundation.[6]; its license was changed from the BSD license to the Apache License and it graduated to a top-level project in November 2022.[7]