LiteOS

Huawei LiteOS is a lightweight real-time operating system (RTOS) from Huawei Technologies Co., Ltd. It is an open source, POSIX compliant operating system licensed under a BSD 3-clause license for IoT smart terminals. Microcontrollers of different architectures such as ARM (M0/3/4/7, A7/17/53, ARM9/11), x86, and RISC-V are supported by the project. Huawei LiteOS is part of Huawei's '1+2+1' Internet of Things solution, and has been featured in a number of open source development kits and industry offerings.
Smartwatches by Huawei and its former Honor brand run LiteOS.
The latest version is V2.1, which was released in May 2018.
History.
On 20 May , at the Huawei Network Conference, Huawei proposed the '1+2+1' Internet of Things solution and release the IoT operating system named Huawei LiteOS.