FreeRTOS and Arm microcontrollers help bring smart devices to market, including devices that securely connect to the cloud.​

FreeRTOS is a MIT licensed open source real-time operating system (RTOS) for microcontrollers that makes small, low-power edge devices easy to program, connect, deploy and manage. FreeRTOS includes a kernel and software libraries that enable you to securely connect devices locally and to the cloud, and to update them remotely after deployment. FreeRTOS users benefit from accelerated development and a global presence.

Tiny, power saving kernel

The FreeRTOS kernel is scalable, with usable program memory footprint as low as 9KB, and includes built-in power saving features.

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Modular libraries

Add-on software libraries for use across all industry sectors, including secure local or cloud connectivity.

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Learn how to use CMSIS-RTOS2 API with an underlying FreeRTOS to make your application code portable to different RTOS Kernels.

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IoT reference integrations

Select your Arm based board and get started with the many pre-tested FreeRTOS example integrations and the useful libraries.

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FreeRTOS resources