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:

• ATECC608A Zero Touch Provisioning Kit for AWS IoT

• Cypress CYW943907AEVAL1F Development Kit

• Cypress CYW954907AEVAL1F Development Kit

• Cypress CY8CKIT-064S0S2-4343W Kit

• Espressif ESP32-DevKitC

• Espressif ESP-WROVER-KIT

• Espressif ESP-WROOM-32SE

• Espressif ESP32-S2-Saola-1

• Infineon XMC4800 IoT Connectivity Kit

• Marvell MW320 AWS IoT Starter Kit

• Marvell MW322 AWS IoT Starter Kit

• MediaTek MT7697Hx Development Kit

• Microchip Curiosity PIC32MZEF Bundle

• Nordic nRF52840-DK

• NuMaker-IoT-M487

• NXP LPC54018 IoT Module

• OPTIGA Trust X Security Solution

• Renesas RX65N RSK IoT Module

• STMicroelectronicsSTM32L4 Discovery Kit IoT Node

• Texas Instruments CC3220SF-LAUNCHXL

• Microsoft Windows 7 or later, with at least a dual core and a hard-wired Ethernet connection

• Xilinx Avnet MicroZed Industrial IoT Kit

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

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

Additional resources

These resources might be helpful to you.

• For additional FreeRTOS Documentation, see freertos.org.

• For questions about FreeRTOS for the FreeRTOS engineering team, you can open an issue on the FreeRTOS GitHub page.

• For technical questions about FreeRTOS, see the FreeRTOS Community Forums.

• For more information about connecting devices to AWS IoT, see Device Provisioning in the AWS IoT Core Developer Guide.

• For technical support for AWS, see AWS Support.

• For questions about AWS billing, account services, events, abuse, or other issues with AWS, see the Contact Us page.