Zephyr, the open source low footprint real time operating system targeting the Internet of Things (IoT), has added support for Bluetooth 5.
Version 1.9.0 of the kernel also includes a Bluetooth Qualification-ready BLE controller and support for mesh networking, as well as a lightweight Machine to Machine (LwM2M) support. There is also POSIX thread IPC support.
New chip architectures include the STM32F405, STM32F417, STM32F103x8 and TI CC2650 SoCs as well as Nordic's nRF52, and ST's STM32L4, and STM32F3
Various boards from Atmel, ST and Olimex have been added, as well as Intel's Quark boards, even though these are being withdrawn from the market.