add a note about ESP-IDF FreeRTOS version
@@ -6,6 +6,9 @@ Overview
This section contains documentation of FreeRTOS types, functions, and macros. It is automatically generated from FreeRTOS header files.
+.. note::
+ ESP-IDF FreeRTOS is based on the Xtensa port of FreeRTOS v8.2.0, however some functions of FreeRTOS v9.0.0 have been backported. See the :ref:`backported-features` for more information.
+
For more information about FreeRTOS features specific to ESP-IDF, see :doc:`ESP-IDF FreeRTOS SMP Changes<../../api-guides/freertos-smp>`
and :doc:`ESP-IDF FreeRTOS Additions<freertos_additions>`.
