micropython/ports/esp32/boards/sdkconfig.base

# MicroPython on ESP32, ESP IDF configuration
# The following options override the defaults

CONFIG_IDF_FIRMWARE_CHIP_ID=0x0000

# Compiler options: use -Os to reduce size, but keep full assertions
# (CONFIG_COMPILER_OPTIMIZATION_LEVEL_RELEASE is for IDF 4.0.2)
CONFIG_COMPILER_OPTIMIZATION_LEVEL_RELEASE=y
CONFIG_COMPILER_OPTIMIZATION_SIZE=y
CONFIG_COMPILER_OPTIMIZATION_ASSERTIONS_ENABLE=y

# Application manager
CONFIG_APP_EXCLUDE_PROJECT_VER_VAR=y
CONFIG_APP_EXCLUDE_PROJECT_NAME_VAR=y

# Bootloader config
CONFIG_BOOTLOADER_LOG_LEVEL_WARN=y

# Change default log level to "ERROR" (instead of "INFO")
CONFIG_LOG_DEFAULT_LEVEL_INFO=n
CONFIG_LOG_DEFAULT_LEVEL_ERROR=y
CONFIG_LOG_DEFAULT_LEVEL=1

# ESP32-specific
CONFIG_ESP_TASK_WDT_CHECK_IDLE_TASK_CPU0=n
CONFIG_ESP_TASK_WDT_CHECK_IDLE_TASK_CPU1=n
CONFIG_ESP32_XTAL_FREQ_AUTO=y

# Power Management
CONFIG_PM_ENABLE=y

# Memory protection
# This is required to allow allocating IRAM
CONFIG_ESP_SYSTEM_MEMPROT_FEATURE=n

# FreeRTOS
CONFIG_FREERTOS_THREAD_LOCAL_STORAGE_POINTERS=2
CONFIG_FREERTOS_SUPPORT_STATIC_ALLOCATION=y
CONFIG_FREERTOS_ENABLE_STATIC_TASK_CLEAN_UP=y

# UDP
CONFIG_LWIP_PPP_SUPPORT=y
CONFIG_LWIP_PPP_PAP_SUPPORT=y
CONFIG_LWIP_PPP_CHAP_SUPPORT=y

# SSL
# Use 4kiB output buffer instead of default 16kiB (because IDF heap is fragmented in 4.0)
CONFIG_MBEDTLS_ASYMMETRIC_CONTENT_LEN=y

# ULP coprocessor support
CONFIG_ESP32_ULP_COPROC_ENABLED=y

# For cmake build
CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
CONFIG_PARTITION_TABLE_CUSTOM=y
CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions.csv"

# To reduce iRAM usage
CONFIG_ESP32_WIFI_IRAM_OPT=n
CONFIG_ESP32_WIFI_RX_IRAM_OPT=n