RT-Thread was born in 2006, it is an open-source, neutral, and community-based real-time operating system (RTOS).

RT-Thread has a Standard version and Nano version.

RT-Thread Architecture:

RT-Thread has not only a real-time kernel but also rich components. Its architecture is as follows:


It includes:

Kernel layer: RT-Thread kernel, the core part of RT-Thread, includes the implementation of objects in the kernel system, such as multi-threading and its scheduling, semaphore, mailbox, message queue, memory management, timer, etc; libcpu/BSP (Chip Migration Related Files/Board Support Package) is closely related to hardware and consists of peripheral drivers and CPU porting.

Components and Service Layer: Components are based on upper-level software on top of the RT-Thread kernel, such as virtual file systems, FinSH command-line interfaces, network frameworks, device frameworks, and more. Its modular design allows for high internal cohesion inside the components and low coupling between components.

RT-Thread software package: A general-purpose software component running on the RT-Thread IoT operating system platform for different application areas, consisting of description information, source code or library files. RT-Thread provides an open package platform with officially available or developer-supplied packages that provide developers with a choice of reusable packages that are an important part of the RT-Thread ecosystem. The package ecosystem is critical to the choice of an operating system because these packages are highly reusable and modular, making it easy for application developers to build the system they want in the shortest amount of time. RT-Thread supports more than 200 software packages.

RT-Thread Features

Supported Architectures

RT-Thread supports many architectures and has covered the major architectures in current applications. Architecture and chip manufacturer involved:

Supported IDE and Compiler
The main IDE/compilers supported by RT-Thread are:

Use Python-based scons for command-line builds.


RT-Thread has received many many supports from the community developers when it starts. Now, RT-Thread has gathered 200+ software packages which are created by the community developers also RT-Thread had 9357 commits and gained 4.2K stars on Github.

Real-time system (RTOS) is increasingly widely used in the high-end Internet of Things (like AIoT) because of its low cost, high real-time, and fast start-up characteristics, soon or later, more and more RTOSs would support multi-kernel SMP, AI, audio & video and this is inevitable. In the near future, RT-Thread Studio IDE, next-generation microkernel architecture, AI frameworks and more will all be released step by step. This is a new world of RTOS.