Software: Building a BLE application on NCS SDK - Contrasting to SoftDevice based BLE applications - Part 2 Central role
Peripherals: Adding a Peripheral to an NCS Zephyr project
Software: Enter the Multi-NUS: A Simple Wireless UART Network
Getting Started : nRF Connect SDK Tutorial - Part 1 | NCS v1.5.0
Getting Started : nRF Connect SDK Tutorial - Part 2 | NCS v1.5.0
Getting Started : nRF Connect SDK Tutorial - Part 3 | NCS v1.5.0
Getting Started : NUS on NCS: The Nordic UART Service with the nRF Connect SDK
Getting Started : Build NCS application firmware images using Docker
Getting Started : NCS BLE tutorial part 1: Custom Service in Peripheral role