This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages) This article reads like a press release or a news article and may be largely based on routine coverage. Please expand this article with properly sourced content to meet Wikipedia's quality standards, event notability guideline, or encyclopedic content policy. (July 2022) This article may rely excessively on sources too closely associated with the subject, potentially preventing the article from being verifiable and neutral. Please help improve it by replacing them with more appropriate citations to reliable, independent, third-party sources. (July 2022) (Learn how and when to remove this template message) A major contributor to this article appears to have a close connection with its subject. It may require cleanup to comply with Wikipedia's content policies, particularly neutral point of view. Please discuss further on the talk page. (September 2022) (Learn how and when to remove this template message) (Learn how and when to remove this template message)
NuttX logo.png
NuttX logo
DeveloperGregory Nutt
Written inC, C++, assembly
OS familyPOSIX
Working stateCurrent
Source modelOpen source
Initial release2007; 15 years ago (2007)
Latest release10.3.0 / June 3, 2022; 4 months ago (2022-06-03) [1]
Marketing targetEmbedded systems
PlatformsARM, AVR, AVR32, HCS12, LM32, MIPS, RISC-V, OpenRISC, SuperH, Xtensa, x86, x86-64, Z80
Kernel typeReal-time microkernel
LicenseApache 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,[citation needed] 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 first released in 2007 under the permissive BSD license.[citation needed][clarification needed] Since December 2019, it has been undergoing incubation at the Apache Software Foundation.[2]


NuttX RTOS is used in a variety of applications, including the Sony CXD5602/Spresense microcontroller[3] as well as an audio recorder from Sony.[4]

The firmware for some of Motorola's MotoMod accessories for the Moto Z used NuttX RTOS,[5][6] and NuttX is also used in the PX4 autopilot drones, which use NuttX to control a variety of autonomous platforms.[7]


  1. ^ "Apache NuttX-Downloads". Retrieved September 27, 2022.
  2. ^ "Apache NuttX (Incubating)". Retrieved April 29, 2021.
  3. ^ "Spresense combines multi-core and power efficiency". Retrieved September 5, 2019.
  4. ^ "Developing Audio Products with Cortex-M3/NuttX/C++11" (PDF). Archived from the original (PDF) on January 20, 2017. Retrieved January 20, 2017.
  5. ^ "Moto Mods Firmware: Overview". Retrieved December 28, 2016.
  6. ^ "Modular Moto Z Android phone supports DIY and RPi HAT add-ons". Retrieved August 22, 2016.
  7. ^ "Autopilot PX4". Retrieved May 3, 2013.