doc: openthread: Add documentation about Thread 1.4

Add documentation about Thread 1.4 and change default version
from 1.3 to 1.4

Signed-off-by: Maciej Baczmanski <[email protected]>

doc/_scripts/software_maturity/software_maturity_features.yaml

@@ -56,6 +56,8 @@ features:
     Thread 1.2 - CSL Receiver: OPENTHREAD_CSL_RECEIVER
     Thread 1.2 - Link Metrics: OPENTHREAD_LINK_METRICS_INITIATOR && OPENTHREAD_LINK_METRICS_SUBJECT
     Thread 1.3 - Core: OPENTHREAD_THREAD_VERSION_1_3
+    Thread 1.4 - Core: OPENTHREAD_THREAD_VERSION_1_4
+    Thread 1.4 - DNS over TCP: OPENTHREAD_DNS_CLIENT_OVER_TCP
     Thread - Full Thread Device (FTD): OPENTHREAD_FTD
     Thread - Minimal Thread Device (MTD): OPENTHREAD_MTD
     Thread FTD + Bluetooth LE multiprotocol: OPENTHREAD_FTD && BT

doc/nrf/links.txt

@@ -1192,6 +1192,7 @@
 .. _`Thread Group members`: https://www.threadgroup.org/thread-group
 .. _`Thread Group's certification information`: https://www.threadgroup.org/What-is-Thread/Certification
 .. _`Thread 1.3.0 Features White Paper`: https://www.threadgroup.org/Portals/0/documents/support/Thread1.3.0WhitePaper_07192022_3990_1.pdf
+.. _`Thread 1.4 Features White Paper`: https://www.threadgroup.org/Portals/0/Documents/Thread_1.4_Features_White_Paper_September_2024.pdf
 
 .. _`Thread Group's Confluence wiki page`: https://threadgroup.atlassian.net/wiki/spaces/THREADTEST/pages/25900869/Supporting+Material
 

doc/nrf/protocols/thread/configuring.rst

@@ -103,15 +103,16 @@ See the following files for more options that you might want to change:
 Thread Specification options
 ============================
 
-The OpenThread stack can be configured to operate in compliance with either the Thread 1.1 Specification, the :ref:`Thread 1.2 Specification <thread_ug_supported_features_v12>`, or the :ref:`Thread 1.3 Specification <thread_ug_supported_features_v13>`.
+The OpenThread stack can be configured to operate in compliance with either the Thread 1.1 Specification, the :ref:`Thread 1.2 Specification <thread_ug_supported_features_v12>`, the :ref:`Thread 1.3 Specification <thread_ug_supported_features_v13>`, or the :ref:`Thread 1.4 Specification <thread_ug_supported_features_v14>`.
 You can change the stack version by using the following Kconfig options:
 
 * :kconfig:option:`CONFIG_OPENTHREAD_THREAD_VERSION_1_1` - Selects the Thread stack version that is compliant with the Thread 1.1 Specification.
 * :kconfig:option:`CONFIG_OPENTHREAD_THREAD_VERSION_1_2` - Selects the Thread stack version that is compliant with the Thread 1.2 Specification.
 * :kconfig:option:`CONFIG_OPENTHREAD_THREAD_VERSION_1_3` - Selects the Thread stack version that is compliant with the Thread 1.3 Specification.
+* :kconfig:option:`CONFIG_OPENTHREAD_THREAD_VERSION_1_4` - Selects the Thread stack version that is compliant with the Thread 1.4 Specification.
   This option is enabled by default if no other option is selected.
 
-By enabling support for Thread 1.2, you enable the following :ref:`thread_ug_supported_features_v12` in addition to the Thread 1.1 features:
+By selecting support for Thread 1.2, you enable the following :ref:`thread_ug_supported_features_v12` in addition to the Thread 1.1 features:
 
 * Coordinated Sampled Listening (CSL)
 * Link Metrics Probing
@@ -120,12 +121,16 @@ By enabling support for Thread 1.2, you enable the following :ref:`thread_ug_sup
 * Enhanced Frame Pending
 * Enhanced Keep Alive
 
-By selecting support for Thread 1.3, you enable the following features in addition to the :ref:`Thread 1.2 features <thread_ug_supported_features>`:
+By selecting support for Thread 1.3, you enable the following :ref:`thread_ug_supported_features_v13` in addition to the :ref:`thread_ug_supported_features_v12`:
 
 * Service Registration Protocol (SRP) client
 
+By selecting support for Thread 1.4, you enable the following :ref:`thread_ug_supported_features_v14` in addition to the :ref:`thread_ug_supported_features_v13` and :ref:`thread_ug_supported_features_v12`:
+
+* Enhanced Internet Connectivity
+* Enhanced Network Diagnostics
+
 For a list of all supported features in the |NCS|, see the :ref:`thread_ug_feature_sets`.
-For more information about Thread 1.2 features, see the `Thread 1.2 Base Features`_ document.
 
 .. _ug_thread_configuring_eui64:
 

doc/nrf/protocols/thread/overview/supported_features.rst

@@ -7,7 +7,7 @@ Supported Thread features
    :local:
    :depth: 2
 
-The OpenThread implementation of the Thread protocol supports all features defined in the Thread 1.3.0 Specification that are required for the Thread 1.3 Certification program:
+The OpenThread implementation of the Thread protocol supports all features defined in the Thread 1.4 Specification that are required for the Thread 1.4 Certification program:
 
 * All Thread networking layers:
 
@@ -26,13 +26,19 @@ The OpenThread implementation of the Thread protocol supports all features defin
   * Multicast across Thread networks
   * Thread Domain unicast addressing
 
-* Features introduced with Thread 1.3.0:
+* Features introduced with Thread 1.3:
 
   * Service Registration Protocol (SRP) client
   * Transport Control Protocol (TCP)
 
+* Features introduced with Thread 1.4:
+
+  * Enhanced Internet Connectivity
+  * Enhanced Network Diagnostics
+  * Secure Commissioning at Scale with TCAT
+
 In the |NCS|, you can choose which version of the Thread protocol to use in your application.
-By default, the |NCS| supports Thread 1.3, which includes support for Thread 1.2.
+By default, the |NCS| supports Thread 1.4, which includes support for Thread 1.3 and Thread 1.2.
 You can enable and configure any Thread version by using :ref:`dedicated options <thread_ug_thread_specification_options>`.
 
 .. _thread_ug_supported_features_v12:
@@ -151,7 +157,51 @@ An alternative TCP stack implementation incorporated from the OpenThread project
 
 See the :file:`tcp.conf` configuration file in the :file:`snippets/tcp/` directory of the :ref:`ot_cli_sample` sample for an example how to enable the alternative TCP implementation.
 
-Limitations for Thread 1.3 support
+.. _thread_ug_supported_features_v14:
+
+Thread 1.4 features
+*******************
+
+For more information about this Thread version, see the official `Thread 1.4 Features White Paper`_.
+
+.. note::
+  See :ref:`thread_ug_thread_specification_options` for how to enable the 1.4 features that are currently available in the |NCS|.
+
+Enhanced Internet Connectivity
+==============================
+
+Thread 1.4 introduces significant enhancements to how Thread devices can connect to the public internet.
+This expansion is achieved through robust support for both IPv6 and IPv4, ensuring a future-proof compatibility with the existing internet infrastructure.
+
+Enhanced Network Diagnostics
+============================
+
+The Enhanced Network Diagnostics added in Thread 1.4 include:
+
+* EUI-64
+* Thread Protocol Version and Thread Stack Version
+* Vendor Name, Vendor Model, and Vendor Software Version
+* Detailed Child information - for Thread Mesh Extenders only
+* Child IPv6 Address List - for Thread Mesh Extenders only
+* Mesh Extender (Router) Neighbors - for Thread Mesh Extenders only
+* Mesh Link Establishment (MLE) Protocol Counters
+* Vendor App URL
+* A method ("Answer TLV") to split a particularly large diagnostic data set over multiple UDP messages
+
+The entity collecting the Thread diagnostic information may itself be directly connected to a Thread network, for example situated on a Thread 1.4 Border Router.
+The collected information can then be retrieved via an authenticated, secure connection from an app or back-end to this Border Router.
+The entity could also be situated outside the Thread Network, collecting diagnostic information in the role of a Thread Commissioner - via a secured IPv6 link to a Thread Border Router.
+
+Thread Commissioning over Authenticated TLS (TCAT)
+==================================================
+
+Thread 1.4 introduces TCAT to enable fast and secure commissioning of large volumes of Thread devices.
+This feature uses an authenticated, certificate-based TLS session between the new Thread device and a commissioning tool/device.
+TCAT support is optional and is expected to be used primarily in commercial (B2B) markets.
+
+See the :file:`tcat.conf` configuration file in the :file:`snippets/tcat/` directory of the :ref:`ot_cli_sample` sample for an example how to enable the TCAT functionality.
+
+Limitations for Thread 1.4 support
 ==================================
 
-Transport Control Protocol (TCP) as defined by the Thread 1.3 Specification is only supported in experimental mode by the |NCS|.
+Thread Commissioning over Authenticated TLS (TCAT) is an optional feature and is only supported in experimental mode by the |NCS|.