Cesium RTOS

Cesium RTOS represents an evolutionary leap from its predecessor, Micrium µC/OS RTOS, propelling real-time operating systems into the next generation. Cesium RTOS introduces cutting-edge advancements and enhanced capabilities, empowering embedded systems with increased performance, improved efficiency, and seamless integration.



product logo ucos


µC/OS is an open-source embedded operating system originally developed by Micriµm.
It features support for TCP/IP, USB, CAN bus, and Modbus, as well as a file system.


Open-Source Apache 2.0 License

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Technical Support

Micrium Support Plan

Technical support services for any of the µC/ software is readily available to all customers currently using or interested in the µC/ family of RTOS components.

If you are currently without technical support for the µC/OS software don’t go at it alone. Please contact us to learn how our µC/OS product experts, with years of Micrium software experience, can save you valuable engineering time and money.

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Consulting Services

Specialized Engineering Services

Do you need specialized assistance with your Micrium-based embedded project? Do you need real-time embedded software expertise for your mission critical application? For these or any other embedded software projects, help is available via our Consulting Services that are tailored to your unique needs. Please contact us with your requirements to learn how we can quickly deliver our expertise to your team.

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Micrium software includes comprehensive documentation, full source code, powerful debugging features, and support for a huge range of CPU architectures.


Micrium software offers unprecedented ease-of-use, a small memory footprint, remarkable energy efficiency, and all with a full suite of protocol stacks.


Engineers across the world building industrial controls, medical devices, and aerospace systems know they can rely on Micrium software for the foundation of exceptional products.