Welcome to the nRF Connect SDK!


nRF Connect SDK v2.1.99-dev1 is a development tag and will be replaced by v2.2.0 in the future.

The development tag contains the following major update, marked as experimental:

  • Added integration of ANT protocol to the nRF Connect SDK. ANT support is provided through an external, private repository.

For other changes that are included in this development tag, see Changelog for nRF Connect SDK v2.1.99-dev1.

The nRF Connect SDK is where you begin building low-power wireless applications with Nordic Semiconductor nRF52, nRF53, and nRF91 Series devices.

The SDK contains optimized cellular IoT (LTE-M and NB-IoT), Bluetooth® Low Energy, Thread, Zigbee, and Bluetooth mesh stacks, a range of applications, samples, and reference implementations, as well as a full suite of drivers for Nordic Semiconductor’s devices. The nRF Connect SDK includes the Zephyr™ real-time operating system (RTOS), which is built for connected low power products.

To access different versions of the nRF Connect SDK documentation, use the version drop-down in the top right corner. A “99” at the end of the version number of this documentation indicates continuous updates on the main branch since the previous major.minor release.