What is FreeRTOS?

Developed in partnership with the world's leading chip companies over a 15-year period, and now downloaded every 170 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.

FreeRTOS includes libraries for connectivity, security, and over-the-air (OTA) updates. FreeRTOS also includes demo applications that show FreeRTOS features on qualified boards.

FreeRTOS is an open-source project. You can download the source code, contribute changes or enhancements, or report issues on the GitHub site at https://github.com/FreeRTOS/FreeRTOS.

We release FreeRTOS code under the MIT open source license, so you can use it in commercial and personal projects.

We also welcome contributions to the FreeRTOS documentation (FreeRTOS User Guide, FreeRTOS Porting Guide, and FreeRTOS Qualification Guide). To view the markdown source for the documentation, see https://github.com/awsdocs/aws-freertos-docs. It's released under the Creative Commons (CC BY-ND) license.

Download FreeRTOS source code

Download the latest FreeRTOS and Long Term Support (LTS) packages from the Downloads page on freertos.org.

FreeRTOS-qualified hardware platforms

The following hardware platforms are qualified for FreeRTOS:

Qualified devices are also listed on the Amazon Partner Device Catalog.

For information about qualifying a new device, see the FreeRTOS Qualification Guide.

Additional resources

These resources might be helpful to you.