System API ********** .. toctree:: :maxdepth: 1 Heap Memory Allocation <mem_alloc> Heap Memory Debugging <heap_debug> Interrupt Allocation <intr_alloc> Watchdogs <wdts> Over The Air Updates (OTA) <ota> Sleep Modes <sleep_modes> Logging <log> Base MAC address <base_mac_address> Application Level Tracing <app_trace> Example code for this API section is provided in :example:`system` directory of ESP-IDF examples.