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 -O2 and disable assertions to improve performance
CONFIG_COMPILER_OPTIMIZATION_PERF=y
CONFIG_COMPILER_OPTIMIZATION_ASSERTIONS_DISABLE=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
CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP=y
CONFIG_BOOTLOADER_APP_ROLLBACK_ENABLE=y

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

# Set the maximum included log level higher than the default,
# so esp.osdebug() can enable more logging at runtime.
#
# To increase the max log verbosity to Debug or Verbose instead, comment
# CONFIG_LOG_MAXIMUM_LEVEL_INFO=y and uncomment one of the other settings.
#
# If not needed, the next line can be commented entirely to save binary size.
CONFIG_LOG_MAXIMUM_LEVEL_INFO=y
#CONFIG_LOG_MAXIMUM_LEVEL_DEBUG=y
#CONFIG_LOG_MAXIMUM_LEVEL_VERBOSE=y

# Main XTAL Config
# Only on: ESP32
CONFIG_XTAL_FREQ_AUTO=y

# ESP System Settings
# Only on: ESP32, ESP32S3
CONFIG_ESP_TASK_WDT_CHECK_IDLE_TASK_CPU0=n
CONFIG_ESP_TASK_WDT_CHECK_IDLE_TASK_CPU1=n

# 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=n

# 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
CONFIG_MBEDTLS_ASYMMETRIC_CONTENT_LEN=y
CONFIG_MBEDTLS_HAVE_TIME_DATE=y
CONFIG_MBEDTLS_PLATFORM_TIME_ALT=y
CONFIG_MBEDTLS_HAVE_TIME=y

# Enable DTLS
CONFIG_MBEDTLS_SSL_PROTO_DTLS=y

# Disable ALPN support as it's not implemented in MicroPython
CONFIG_MBEDTLS_SSL_ALPN=n

# Disable slow or unused EC curves
CONFIG_MBEDTLS_ECP_DP_BP256R1_ENABLED=n
CONFIG_MBEDTLS_ECP_DP_BP384R1_ENABLED=n
CONFIG_MBEDTLS_ECP_DP_BP512R1_ENABLED=n
CONFIG_MBEDTLS_ECP_DP_CURVE25519_ENABLED=n

# Disable certificate bundle as it's not implemented in MicroPython
CONFIG_MBEDTLS_CERTIFICATE_BUNDLE=n
CONFIG_MBEDTLS_CERTIFICATE_BUNDLE_DEFAULT_FULL=n

# Allow mbedTLS to allocate from PSRAM or internal memory
#
# (The ESP-IDF default is internal-only, partly for physical security to prevent
# possible information leakage from unencrypted PSRAM contents on the original
# ESP32 - no PSRAM encryption on that chip. MicroPython doesn't support flash
# encryption and is already storing the Python heap in PSRAM so this isn't a
# significant factor in overall physical security.)
CONFIG_MBEDTLS_DEFAULT_MEM_ALLOC=y

# ULP coprocessor support
# Only on: ESP32, ESP32S2, ESP32S3
CONFIG_ULP_COPROC_ENABLED=y
CONFIG_ULP_COPROC_TYPE_FSM=y
CONFIG_ULP_COPROC_RESERVE_MEM=2040

# For cmake build
CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
CONFIG_PARTITION_TABLE_CUSTOM=y
CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions-4MiBplus.csv"

# To reduce iRAM usage
CONFIG_ESP32_WIFI_IRAM_OPT=n
CONFIG_ESP32_WIFI_RX_IRAM_OPT=n
CONFIG_SPI_MASTER_ISR_IN_IRAM=n
CONFIG_SPI_SLAVE_ISR_IN_IRAM=n
CONFIG_ESP_EVENT_POST_FROM_IRAM_ISR=n
CONFIG_PERIPH_CTRL_FUNC_IN_IRAM=n

# Legacy ADC Calibration Configuration
# Only on: ESP32
CONFIG_ADC_CAL_EFUSE_TP_ENABLE=y
CONFIG_ADC_CAL_EFUSE_VREF_ENABLE=y
CONFIG_ADC_CAL_LUT_ENABLE=y

# UART Configuration
CONFIG_UART_ISR_IN_IRAM=y

# IDF 5 deprecated
CONFIG_PCNT_SUPPRESS_DEPRECATE_WARN=y
CONFIG_RMT_SUPPRESS_DEPRECATE_WARN=y
CONFIG_TOUCH_SUPPRESS_DEPRECATE_WARN=y

CONFIG_ETH_USE_SPI_ETHERNET=y
CONFIG_ETH_SPI_ETHERNET_W5500=y
CONFIG_ETH_SPI_ETHERNET_KSZ8851SNL=y
CONFIG_ETH_SPI_ETHERNET_DM9051=y

# Using newlib "nano" formatting saves size on SoCs where "nano" formatting
# functions are in ROM. ESP32-C6 (and possibly other new chips) have "full"
# newlib formatting in ROM instead and should override this, check
# ESP_ROM_HAS_NEWLIB_NANO_FORMAT in ESP-IDF.
CONFIG_NEWLIB_NANO_FORMAT=y

# IRAM/DRAM split protection is a memory protection feature on some parts
# that support SOC_CPU_IDRAM_SPLIT_USING_PMP, eg. C2, C5, C6, H2
# Due to limitations in the PMP system this feature breaks native emitters
# so is disabled by default.
CONFIG_ESP_SYSTEM_PMP_IDRAM_SPLIT=n

# Further limit total sockets in TIME-WAIT when there are many short-lived
# connections.
CONFIG_LWIP_MAX_ACTIVE_TCP=12

# Enable new I2C slave API, and disable conflict check.
CONFIG_I2C_SKIP_LEGACY_CONFLICT_CHECK=y
CONFIG_I2C_ENABLE_SLAVE_DRIVER_VERSION_2=y