System API
**********

.. toctree::
   :maxdepth: 1

   FreeRTOS <freertos>
   FreeRTOS Additions <freertos_additions>
   Heap Memory Allocation <mem_alloc>
   Heap Memory Debugging <heap_debug>
   Himem (large external SPI RAM) API <himem>
   Interrupt Allocation <intr_alloc>
   Watchdogs <wdts>
   Inter-Processor Call <ipc>
   High Resolution Timer <esp_timer>
   Logging <log>
   Event Loop Library <esp_event>
   Application Level Tracing <app_trace>
   Power Management <power_management>
   Sleep Modes <sleep_modes>
   Over The Air Updates (OTA) <ota>
   ESP HTTPS OTA <esp_https_ota>
   ESP pthread <esp_pthread>
   Error Codes and Helper Functions <esp_err>
   Miscellaneous System APIs <system>


Example code for this API section is provided in :example:`system` directory of ESP-IDF examples.