Software Development Kit for the nRF51 Series and nRF52 Series


The nRF5 SDK provides a rich and well tested software development environment for the nRF52 Series and nRF51 Series devices. The nRF5 SDK is intended be used as a foundation for any generic Bluetooth® Low Energy, ANT or proprietary 2.4Ghz product development.
SDK icon

It includes a broad selection of drivers, libraries, examples for peripherals, SoftDevices, and proprietary radio protocols of the nRF52 Series and nRF51 Series. The SDK comes with support for Segger Embedded Studio, Keil レVision⑩ IDE, GCC make files, and IAR support which gives you the freedom to choose which IDE and compiler to use.

All code examples included in the SDK tested with Nordic Semiconductor’s Development Kits.


The current version of the nRF5 SDK can be found on the "downloads" tab of this page.


Tutorial series: Getting started with SEGGER Embedded Studio and the nRF5 SDK:


  • Complete SDK for developing firmware
  • nRF52 Series devices supported, latest version recommended
  • nRF51 Series devices supported up to version v12
  • Project files for Segger Embedded Studio, Keil レVision⑩ IDE, GCC make files, and IAR support
  • Qualified Bluetooth services and profiles
  • Bluetooth 5 support and examples
  • IoT Components v1.0 integration (previously nRF5 IoT SDK)
  • ANT profiles
  • Gazell and ESB proprietary radio protocol examples
  • Secure signed Device Firmware Update (DFU) examples
  • NFC libraries for the nRF52 Series
  • Floating Point Unit (FPU) examples
  • General examples on how to use our devices


  • nRF5 SDK

Supported products/complementary

Product Brief Description
nRF51822 Bluetooth Low Energy and 2.4GHz proprietary multiprotocol Soc
nRF51824 Automotive grade Bluetooth Low Energy SoC
nRF51422 ANT and ANT/Bluetooth Low Energy multiprotocol SoC
nRF52832 Multiprotocol Bluetooth Low Energy/ANT/2.4GHz SoC

Ordering codes



Software Development Kit
Nordic Semiconductor's Software Development Kits (SDK) are your starting point for software development on the nRF51 and nRF52 Series. It contains source code libraries and example applications covering wireless functions, libraries for all peripherals, bootloaders, Wired and OTA FW upgrades, RTOS examples, serialization libraries and more.

Software Development Kit

Code Name Version
nRF5-SDK-v12-zip nRF5 SDK Zip File - works with S132 v3 and S130 v2 12.3.0
nRF5-SDK-zip nRF5 SDK Zip File - works with S112 v6.1.0, S132 v6.1.0, S140 v6.1.0, and S212 v5.0.0
Note that support for the nRF51 Series was included up until v12.3 of the nRF5 SDK