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|Written in||C, C++, assembly|
|Source model||Open source|
|Latest release||12.1.0 / April 16, 2023|
|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|
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. Scalable from 8-bit to 64-bit microcontroller environments, 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, or inappropriate for deeply embedded environments, such as the fork() system call.
NuttX was first released in 2007 under the permissive BSD license.[clarification needed] Since December 2019, it has been undergoing incubation at the Apache Software Foundation.
NuttX RTOS is used in a variety of applications, including the Sony CXD5602/Spresense microcontroller as well as an audio recorder from Sony.
The firmware for some of Motorola's MotoMod accessories for the Moto Z used NuttX RTOS, and NuttX is also used in the PX4 autopilot drones, which use NuttX to control a variety of autonomous platforms.
- ^ "Apache NuttX-12.1.0". Retrieved April 16, 2023.
- ^ "Apache NuttX (Incubating)". incubator.apache.org. Retrieved April 29, 2021.
- ^ "Spresense combines multi-core and power efficiency". Retrieved September 5, 2019.
- ^ "Developing Audio Products with Cortex-M3/NuttX/C++11" (PDF). Archived from the original (PDF) on January 20, 2017. Retrieved January 20, 2017.
- ^ "Moto Mods Firmware: Overview". Retrieved December 28, 2016.
- ^ "Modular Moto Z Android phone supports DIY and RPi HAT add-ons". Retrieved August 22, 2016.
- ^ "Autopilot PX4". Retrieved May 3, 2013.