esp-idf/docs/api/system/index.rst

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

.. toctree::
   :maxdepth: 1

   Memory Allocation <mem_alloc>
   Interrupt Allocation <intr_alloc>
   Watchdogs <wdts>
   OTA <ota>
   Deep Sleep <deep_sleep>
   Logging <log>


Example code for this API section is provided in `examples/system <https://github.com/espressif/esp-idf/tree/master/examples/system>`_ directory of ESP-IDF repository.