API Guides ********** :link_to_translation:`zh_CN:[中文]` .. toctree:: :maxdepth: 1 Application Level Tracing :SOC_BT_SUPPORTED: BluFi Bootloader Build System :esp32: Build System (Legacy GNU Make) Deep Sleep Wake Stubs :esp32s2: Device Firmware Upgrade through USB Error Handling :SOC_BT_SUPPORTED: ESP-BLE-MESH ESP-MESH (Wi-Fi) Core Dump Event Handling External SPI-connected RAM Fatal Errors Flash Encryption <../security/flash-encryption> FreeRTOS SMP Changes General Notes High Level Interrupts JTAG Debugging Linker Script Generation lwIP TCP/IP Stack Partition Tables :esp32: RF Calibration ROM debug console :esp32: Secure Boot <../security/secure-boot-v1> Secure Boot V2 <../security/secure-boot-v2> Thread Local Storage Tools ULP Coprocessor :esp32: ULP Coprocessor (Legacy GNU Make) Unit Testing :esp32: Unit Testing (Legacy GNU Make) WiFi Driver