NuttX

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NuttX

NuttX logo
Developer	Apache Software Foundation
Written in	C, C++, assembly
OS family	POSIX
Working state	Current
Source model	Open source
Initial release	2007; 17 years ago (2007)
Latest release	12.7.0 / October 30, 2024; 4 days ago (2024-10-30) [1]
Repository	github.com/apache/nuttx
Marketing target	Embedded systems
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.apache.org

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]}

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]