Thread (OpenThread) firmware for nrf52840-based simple Thread router node.

Steps to compile:

1. download and unpack Thread SDK 4.1.0
2. open Tools => Options => Building => Global Macros settings in Segger Embedded Studio and fill PATH_TO_SDK variable with path to Thread SDK without trailing slash, i.e. PATH_TO_SDK=C:/thread_sdk_410
3. open poject file ./efekta_mini_dev_board/s140/ses/nrf52840_router_thread.emProject in Segger Embedded Studio
4. сhange project settings if necessary (settings.h file)
5. compile and flash firmware