FreeRTOS Kernel v10.4.1 is now available for download! See Upgrading to FreeRTOSv10.4.x for more details.
 

Quality RTOS & Embedded Software

FreeRTOS™ Real-time operating system for microcontrollers

Developed in partnership with the world’s leading chip companies over a 15-year period, and now downloaded every 175 seconds, FreeRTOS is a market-leading real-time operating system (RTOS) for microcontrollers and small microprocessors. Distributed freely under the MIT open source license, FreeRTOS includes a kernel and a growing set of libraries suitable for use across all industry sectors. FreeRTOS is built with an emphasis on reliability and ease of use.

Why FreeRTOS?

  • Trusted kernel

    With proven robustness, tiny footprint, and wide device support, the FreeRTOS kernel is trusted by world-leading companies as the de facto standard for microcontrollers and small microprocessors.

  • Accelerate time to market

    With detailed pre-configured demos and Internet of Things (IoT) reference integrations, there is no need to determine how to setup a project. Instantly download, compile, and get to market faster.

  • Broad ecosystem support

    Our partner ecosystem provides a breadth of options including community contributions, professional support, as well as integrated IDE and productivity tools.

Features

Tiny, power-saving kernel

Scalable size, with usable program memory footprint as low as 9KB. Some architectures include a tick-less power saving mode

Support for 40+ architectures

One code base for 40+ MCU architectures and 15+ toolchains, including the latest RISC-V and ARMv8-M (Arm Cortex-M33) microcontrollers

Modular libraries

A growing number of add-on libraries used across all industry sectors, including secure local or cloud connectivity

AWS Reference Integrations

Take advantage of tested examples that include all the libraries essential to securely connect to the cloud

MIT licensed, with options

FreeRTOS can be used for any purpose under its MIT license. Our strategic partner also provides commercial licenses, and safety certification.

FreeRTOS partners

Latest posts

  • FreeRTOS Kernel v10.4.0 is now available

    FreeRTOS kernel v10.4.0 is now available for download. The new version brings numerous new features such as improved direct to task notifications functionality, enhancements to kernel ports that support memory protection units (MPUs), and a new Linux port. See the change history for additional details. Direct to Task Notification Enhancements Prior to FreeRTOS V10.4.0, each […]

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  • micro-ROS on FreeRTOS

    Authors: Francesca Finocchiaro (eProsima), Pablo Garrido-Sanchez (eProsima), José Antonio Moral Parras (eProsima) Introduction The Robot Operating System (ROS) is an open source software framework for robotics applications development. ROS 2 is the second generation of ROS, designed with a layered architecture that separates the ROS client layers (RCL and RCLCPP/RCLCPY) from the ROS middleware layer […]

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  • What’s New in July 2020 FreeRTOS Releases

    We are excited to share these latest updates: Progress toward the FreeRTOS LTS release: Refactored MQTT library: The 200717_LTS_development_snapshot.zip file contains, among other things, our progress toward completing the refactoring and quality checklist for the MQTT library. It is now simpler to bring the MQTT library into any project – including projects that do not […]

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