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] The main governing standards in NuttX are from the Portable Operating System Interface (POSIX) and the American National Standards Institute (ANSI). 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 | 12.12.0 / December 31, 2025 [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 microkernel |
| License | Apache License 2.0 |
| Official website | nuttx |
NuttX was initially released in 2007 under the permissive BSD license.[3] In December 2019, it began incubation at the Apache Software Foundation.[4] Changing its license from BSD to Apache License and graduated to a top-level project in November 2022.[5]