| RT-Thread | |
|---|---|
| Developer | Bernard Xiong & RT-Thread Team |
| Written in | C |
| Working state | Current |
| Source model | Open source |
| Initial release | 2006; 20 years ago (2006) |
| Latest release | 5.2.1 / May 30, 2025; 8 months ago (2025-05-30) |
| Repository | |
| Marketing target | Embedded systems,IoT |
| Supported platforms | ARM (Cortex-M0,-M3,-M4,-M7,-M23,-R4,-A8,-A9;ARM7,ARM9,ARM11),MIPS32,RISC-V,ARC,TMS320 DSP, C-Sky,x86 |
| Kernel type | Monolithic |
| License | Apache 2.0 |
| Official website | www |
RT-Thread is anopen-sourcereal-time operating system (RTOS) forembedded systems andInternet of things (IoT).[1][2] It is developed by the RT-Thread Development Team based inChina. RT-Thread is aimed to change the current situation in China that there is no well used open-source real-time operating system in themicrocontroller field.
As of August 2020[update], RT-Thread was reported to be #3 on the list of RTOSes with the largest number of contributors (behindZephyr andMbed).[3]
In 2006, RT-Thread began as an open-source real-time operating system (RTOS) that is mainly written in theprogramming languageC. In 2017, a second variant was released for resource-constrained microcontrollers; it needs a minimum of 3 kBflash memory orread-only memory (ROM) and 1.2 kBrandom-access memory (RAM). Also, RT-Thread's first variant was namedStandard, and second variant was namedNano.[1][2]
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