.. _index:

Welcome to the |NCS|!
#####################

.. important::

   |NCS| v1.4.99-dev1 is a development tag and will be replaced by v1.5.0 in the future.

   For a list of changes that are included in this development tag, see :ref:`ncs_release_notes_latest`.
   For a list of known issues, see `known issues for nRF Connect SDK v1.4.99-dev1`_ (in the latest documentation).

The |NCS| 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 |NCS| includes the Zephyr™ real-time operating system (RTOS), which is built for connected low power products.

.. note::

   |NCS| v1.4.99-dev1 supports prototyping and evaluation, but should not be used for production and deployment in end products.

.. previous note about development and production support
..   nRF53 Series devices (which are pre-production) and Zigbee and Bluetooth Mesh protocols are supported for development in |release| for prototyping and evaluation.
..   Support for production and deployment in end products is coming soon.

To access different versions of the |NCS| documentation, use the version drop-down in the top-left corner.

In addition to the |NCS| documentation, information is available in the following locations:

.. rst-class:: doc-link blue-box
..

    .. rst-class:: doc-link-image

    .. image:: /images/doc_icon.svg
       :target: `Nordic Semiconductor Infocenter`_

    .. rst-class:: doc-link-text

    `Nordic Semiconductor Infocenter`_

.. rst-class:: doc-link gray-box
..

    .. rst-class:: doc-link-image

    .. image:: /images/DevZone.svg
       :target: `DevZone`_

    .. rst-class:: doc-link-text

    `Tutorials and blog posts <DevZone_>`_


.. toctree::
   :maxdepth: 2
   :caption: Contents:

   introduction
   documentation
   getting_started
   ug_dev_model
   ug_app_dev
   ug_nrf91
   ug_nrf5340
   ug_nrf52
   protocols
   examples
   drivers
   libraries
   scripts
   release_notes

..   known_issues

..   cheat_sheet