esp-idf: [TW#17597] OTA updates failing randomly inside spi_flash_write_inner

EDIT 3: esp_ota_begin sometimes takes a few seconds to return. Sometimes, it never returns, and a WDT reboot occurs. EDIT 3.5: Increasing WDT timeout to 10s (per https://github.com/espressif/esp-idf/issues/578) fixes this the esp_ota_begin issue, but not the main issue outlined below. EDIT 2: Increasing IPC stack size does not help. EDIT 1: Calling esp_ota_write with 4096 bytes (full flash sector) seems to help, a bit. It now sometimes completes. Probably because this results in fewer calls.

Having a lot of trouble with OTA updates.

After doing a bit of digging, it appears that spi_flash_write_inner is not returning properly from where it’s called from flash_ops.c: https://github.com/espressif/esp-idf/blob/master/components/spi_flash/flash_ops.c#L375

Line 377 is never reached.

I’ve updated to the latest IDF (hash f9ad17eee45e6fb6c48ef72f8ff8aa1480bb2453), and the IDF submodules are up-to-date as well. Toolchain is: xtensa-esp32-elf-gcc (crosstool-NG crosstool-ng-1.22.0-75-gbaf03c2) 5.2.0

Doesn’t seem to matter if SPI_FLASH_VERIFY_WRITE (and setting all suboptions) is set or not. Unsetting CONFIG_SPI_FLASH_ROM_DRIVER_PATCH seems to make it worse, when usin

When it freezes, the serial monitor shows:

Task watchdog got triggered. The following tasks did not reset the watchdog in time:
 - IDLE (CPU 1)
Tasks currently running:
CPU 0: IDLE
CPU 1: ipc1
Task watchdog got triggered. The following tasks did not reset the watchdog in time:
 - IDLE (CPU 1)
Tasks currently running:
CPU 0: IDLE
CPU 1: ipc1

Relevant code section is below. esp_ota_write fails to return.

    bool downloadUpdate(const string& url, string updateHash) {
        const char * TAG = "update";

        const esp_partition_t *configured = esp_ota_get_boot_partition();
        const esp_partition_t *running = esp_ota_get_running_partition();
        const esp_partition_t *update_partition = esp_ota_get_next_update_partition(NULL);

        if (configured != NULL ) {
            L(TAG, "Configured for partition subtype %d at offset 0x%x", configured->subtype, update_partition->address);
        } else {
            L(TAG, "Configured partition is NULL");
        }

        if (running != NULL) {

            L(TAG, "Running from partition subtype %d at offset 0x%x", running->subtype, update_partition->address); 
        } else {
            L(TAG, "Running partition is NULL");
        }

        if(update_partition != NULL) {
            L(TAG, "Writing to partition subtype %d at offset 0x%x", update_partition->subtype, update_partition->address);

        } else {
            L(TAG, "Running partition is NULL");
        }
        esp_ota_handle_t update_handle;
        L(TAG, "update begin");
        if (esp_ota_begin(update_partition, OTA_SIZE_UNKNOWN, &update_handle) == ESP_OK) {
            L(TAG, "after update begin");

            Http http("<redacted>/" VERSION_STRING, ROOT_CERT);
            int result = http.get(url);
            if (result == 200) {


                Sha256 sha256;
                uint8_t buf [1024];
                int read;
                int ttl_read = 0;
                int timeout = 5000;
                elapsedMillis printTimer = 3000;

                while (true) {
                    read = http.read(buf, sizeof(buf), timeout);

                    if (read == 0) {
                        break;
                    }

                    if ( read < 0 ) {
                        if (errno == EAGAIN) {
                            L(TAG, "read timeout");
                            continue;
                        }
                        L(TAG,"read error, aborting");
                        return false;
                    }

                    ttl_read += read;
                    sha256.update(buf, read);
                    L(TAG, "> esp_ota_write %d", read);
                    if (esp_ota_write(update_handle, buf, read) != ESP_OK) {
                        L(TAG,"ota_esp_write failed");
                        return false;
                    }
                    L(TAG, "< esp_ota_write");
                    if (printTimer > 100) {
                        L(TAG, "downloaded %d bytes", ttl_read);
                        printTimer = 0;
                    }
                }
                L(TAG, "downloaded %d bytes total", ttl_read);
                if (esp_ota_end(update_handle) != ESP_OK) {
                    L(TAG,"esp_ota_end() failed");
                    return false;
                }

                uint8_t computedHash[65]; 
                memset(computedHash, 0, sizeof(computedHash));
                sha256.finish(computedHash);

                for (std::string::iterator i = updateHash.begin(); i != updateHash.end(); ++i) {
                    *i = toupper(*i);
                }

                for (int i = 31; i >= 0; --i) {
                    uint8_t b = computedHash[i];
                    computedHash[i * 2] = HEXDIGIT(b >> 4);
                    computedHash[i * 2 + 1] = HEXDIGIT(b & 0xF);
                }
                L(TAG, "computed hash %s", computedHash);

                if (updateHash != (char *)computedHash) {
                    L(TAG, "computed hash of %s does not equal update hash of %s, aborting", computedHash, updateHash.c_str());
                    return false;
                }

                L(TAG, "Updating bootable partition");
                if (esp_ota_set_boot_partition(update_partition, 3) != ESP_OK) {
                    L(TAG,"esp_ota_set_boot_partition() failed");
                    return false;
                }
            } else {
                L(TAG,"HTTP GET failed");
                return false;
            }
        } else {
            L(TAG, "esp_ota_begin() returned an error");
            return false;
        }

        L(TAG, "OTA update successful");
        esp_ota_boot_count_op(OTA_BOOT_COUNT_ZERO, NULL);
        return true;

    }

sdkconfig:

#
# Automatically generated file; DO NOT EDIT.
# Espressif IoT Development Framework Configuration
#

#
# SDK tool configuration
#
CONFIG_TOOLPREFIX="xtensa-esp32-elf-"
CONFIG_PYTHON="python"
CONFIG_MAKE_WARN_UNDEFINED_VARIABLES=y

#
# Bootloader config
#
CONFIG_LOG_BOOTLOADER_LEVEL_NONE=
CONFIG_LOG_BOOTLOADER_LEVEL_ERROR=
CONFIG_LOG_BOOTLOADER_LEVEL_WARN=
CONFIG_LOG_BOOTLOADER_LEVEL_INFO=y
CONFIG_LOG_BOOTLOADER_LEVEL_DEBUG=
CONFIG_LOG_BOOTLOADER_LEVEL_VERBOSE=
CONFIG_LOG_BOOTLOADER_LEVEL=3
CONFIG_BOOTLOADER_VDDSDIO_BOOST=y

#
# Security features
#
CONFIG_SECURE_BOOT_ENABLED=
CONFIG_FLASH_ENCRYPTION_ENABLED=

#
# Serial flasher config
#
CONFIG_ESPTOOLPY_PORT="/dev/ttyUSB0"
CONFIG_ESPTOOLPY_BAUD_115200B=
CONFIG_ESPTOOLPY_BAUD_230400B=
CONFIG_ESPTOOLPY_BAUD_921600B=
CONFIG_ESPTOOLPY_BAUD_2MB=y
CONFIG_ESPTOOLPY_BAUD_OTHER=
CONFIG_ESPTOOLPY_BAUD_OTHER_VAL=115200
CONFIG_ESPTOOLPY_BAUD=2000000
CONFIG_ESPTOOLPY_COMPRESSED=y
CONFIG_FLASHMODE_QIO=
CONFIG_FLASHMODE_QOUT=
CONFIG_FLASHMODE_DIO=y
CONFIG_FLASHMODE_DOUT=
CONFIG_ESPTOOLPY_FLASHMODE="dio"
CONFIG_ESPTOOLPY_FLASHFREQ_80M=
CONFIG_ESPTOOLPY_FLASHFREQ_40M=y
CONFIG_ESPTOOLPY_FLASHFREQ_26M=
CONFIG_ESPTOOLPY_FLASHFREQ_20M=
CONFIG_ESPTOOLPY_FLASHFREQ="40m"
CONFIG_ESPTOOLPY_FLASHSIZE_1MB=
CONFIG_ESPTOOLPY_FLASHSIZE_2MB=y
CONFIG_ESPTOOLPY_FLASHSIZE_4MB=
CONFIG_ESPTOOLPY_FLASHSIZE_8MB=
CONFIG_ESPTOOLPY_FLASHSIZE_16MB=
CONFIG_ESPTOOLPY_FLASHSIZE="2MB"
CONFIG_ESPTOOLPY_FLASHSIZE_DETECT=y
CONFIG_ESPTOOLPY_BEFORE_RESET=y
CONFIG_ESPTOOLPY_BEFORE_NORESET=
CONFIG_ESPTOOLPY_BEFORE="default_reset"
CONFIG_ESPTOOLPY_AFTER_RESET=y
CONFIG_ESPTOOLPY_AFTER_NORESET=
CONFIG_ESPTOOLPY_AFTER="hard_reset"
CONFIG_MONITOR_BAUD_9600B=
CONFIG_MONITOR_BAUD_57600B=
CONFIG_MONITOR_BAUD_115200B=y
CONFIG_MONITOR_BAUD_230400B=
CONFIG_MONITOR_BAUD_921600B=
CONFIG_MONITOR_BAUD_2MB=
CONFIG_MONITOR_BAUD_OTHER=
CONFIG_MONITOR_BAUD_OTHER_VAL=115200
CONFIG_MONITOR_BAUD=115200

#
# Partition Table
#
CONFIG_PARTITION_TABLE_SINGLE_APP=
CONFIG_PARTITION_TABLE_TWO_OTA=
CONFIG_PARTITION_TABLE_CUSTOM=y
CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions.csv"
CONFIG_PARTITION_TABLE_CUSTOM_APP_BIN_OFFSET=0x10000
CONFIG_PARTITION_TABLE_FILENAME="partitions.csv"
CONFIG_APP_OFFSET=0x10000

#
# Compiler options
#
CONFIG_OPTIMIZATION_LEVEL_DEBUG=y
CONFIG_OPTIMIZATION_LEVEL_RELEASE=
CONFIG_OPTIMIZATION_ASSERTIONS_ENABLED=y
CONFIG_OPTIMIZATION_ASSERTIONS_SILENT=
CONFIG_OPTIMIZATION_ASSERTIONS_DISABLED=
CONFIG_CXX_EXCEPTIONS=
CONFIG_STACK_CHECK_NONE=y
CONFIG_STACK_CHECK_NORM=
CONFIG_STACK_CHECK_STRONG=
CONFIG_STACK_CHECK_ALL=
CONFIG_STACK_CHECK=

#
# Component config
#

#
# Application Level Tracing
#
CONFIG_ESP32_APPTRACE_DEST_TRAX=
CONFIG_ESP32_APPTRACE_DEST_NONE=y
CONFIG_ESP32_APPTRACE_ENABLE=
CONFIG_ESP32_APPTRACE_LOCK_ENABLE=y

#
# FreeRTOS SystemView Tracing
#
CONFIG_AWS_IOT_SDK=y
CONFIG_AWS_IOT_MQTT_HOST=""
CONFIG_AWS_IOT_MQTT_PORT=8883
CONFIG_AWS_IOT_MQTT_TX_BUF_LEN=1024
CONFIG_AWS_IOT_MQTT_RX_BUF_LEN=3192
CONFIG_AWS_IOT_MQTT_NUM_SUBSCRIBE_HANDLERS=2
CONFIG_AWS_IOT_MQTT_MIN_RECONNECT_WAIT_INTERVAL=1000
CONFIG_AWS_IOT_MQTT_MAX_RECONNECT_WAIT_INTERVAL=128000

#
# Bluetooth
#
CONFIG_BT_ENABLED=y
CONFIG_BTDM_CONTROLLER_PINNED_TO_CORE_0=y
CONFIG_BTDM_CONTROLLER_PINNED_TO_CORE_1=
CONFIG_BTDM_CONTROLLER_PINNED_TO_CORE=0
CONFIG_BTDM_CONTROLLER_HCI_MODE_VHCI=y
CONFIG_BTDM_CONTROLLER_HCI_MODE_UART_H4=
CONFIG_BLUEDROID_ENABLED=y
CONFIG_BLUEDROID_PINNED_TO_CORE_0=y
CONFIG_BLUEDROID_PINNED_TO_CORE_1=
CONFIG_BLUEDROID_PINNED_TO_CORE=0
CONFIG_BTC_TASK_STACK_SIZE=3072
CONFIG_BLUEDROID_MEM_DEBUG=
CONFIG_CLASSIC_BT_ENABLED=
CONFIG_GATTS_ENABLE=
CONFIG_GATTC_ENABLE=
CONFIG_BLE_SMP_ENABLE=
CONFIG_BT_STACK_NO_LOG=
CONFIG_BT_ACL_CONNECTIONS=4
CONFIG_SMP_ENABLE=
CONFIG_BT_RESERVE_DRAM=0x10000

#
# ESP32-specific
#
CONFIG_ESP32_DEFAULT_CPU_FREQ_80=
CONFIG_ESP32_DEFAULT_CPU_FREQ_160=y
CONFIG_ESP32_DEFAULT_CPU_FREQ_240=
CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ=160
CONFIG_MEMMAP_SMP=y
CONFIG_SPIRAM_SUPPORT=
CONFIG_MEMMAP_TRACEMEM=
CONFIG_MEMMAP_TRACEMEM_TWOBANKS=
CONFIG_ESP32_TRAX=
CONFIG_TRACEMEM_RESERVE_DRAM=0x0
CONFIG_ESP32_ENABLE_COREDUMP_TO_FLASH=
CONFIG_ESP32_ENABLE_COREDUMP_TO_UART=
CONFIG_ESP32_ENABLE_COREDUMP_TO_NONE=y
CONFIG_ESP32_ENABLE_COREDUMP=
CONFIG_TWO_UNIVERSAL_MAC_ADDRESS=
CONFIG_FOUR_UNIVERSAL_MAC_ADDRESS=y
CONFIG_NUMBER_OF_UNIVERSAL_MAC_ADDRESS=4
CONFIG_SYSTEM_EVENT_QUEUE_SIZE=32
CONFIG_SYSTEM_EVENT_TASK_STACK_SIZE=4096
CONFIG_MAIN_TASK_STACK_SIZE=1024
CONFIG_IPC_TASK_STACK_SIZE=1024
CONFIG_TIMER_TASK_STACK_SIZE=4096
CONFIG_NEWLIB_STDOUT_LINE_ENDING_CRLF=y
CONFIG_NEWLIB_STDOUT_LINE_ENDING_LF=
CONFIG_NEWLIB_STDOUT_LINE_ENDING_CR=
CONFIG_NEWLIB_STDIN_LINE_ENDING_CRLF=
CONFIG_NEWLIB_STDIN_LINE_ENDING_LF=
CONFIG_NEWLIB_STDIN_LINE_ENDING_CR=y
CONFIG_NEWLIB_NANO_FORMAT=
CONFIG_CONSOLE_UART_DEFAULT=y
CONFIG_CONSOLE_UART_CUSTOM=
CONFIG_CONSOLE_UART_NONE=
CONFIG_CONSOLE_UART_NUM=0
CONFIG_CONSOLE_UART_BAUDRATE=115200
CONFIG_ULP_COPROC_ENABLED=
CONFIG_ULP_COPROC_RESERVE_MEM=0
CONFIG_ESP32_PANIC_PRINT_HALT=
CONFIG_ESP32_PANIC_PRINT_REBOOT=y
CONFIG_ESP32_PANIC_SILENT_REBOOT=
CONFIG_ESP32_PANIC_GDBSTUB=
CONFIG_ESP32_DEBUG_OCDAWARE=y
CONFIG_INT_WDT=y
CONFIG_INT_WDT_TIMEOUT_MS=300
CONFIG_INT_WDT_CHECK_CPU1=y
CONFIG_TASK_WDT=y
CONFIG_TASK_WDT_PANIC=
CONFIG_TASK_WDT_TIMEOUT_S=5
CONFIG_TASK_WDT_CHECK_IDLE_TASK_CPU0=y
CONFIG_TASK_WDT_CHECK_IDLE_TASK_CPU1=y
CONFIG_BROWNOUT_DET=y
CONFIG_BROWNOUT_DET_LVL_SEL_0=y
CONFIG_BROWNOUT_DET_LVL_SEL_1=
CONFIG_BROWNOUT_DET_LVL_SEL_2=
CONFIG_BROWNOUT_DET_LVL_SEL_3=
CONFIG_BROWNOUT_DET_LVL_SEL_4=
CONFIG_BROWNOUT_DET_LVL_SEL_5=
CONFIG_BROWNOUT_DET_LVL_SEL_6=
CONFIG_BROWNOUT_DET_LVL_SEL_7=
CONFIG_BROWNOUT_DET_LVL=0
CONFIG_ESP32_TIME_SYSCALL_USE_RTC_FRC1=y
CONFIG_ESP32_TIME_SYSCALL_USE_RTC=
CONFIG_ESP32_TIME_SYSCALL_USE_FRC1=
CONFIG_ESP32_TIME_SYSCALL_USE_NONE=
CONFIG_ESP32_RTC_CLOCK_SOURCE_INTERNAL_RC=y
CONFIG_ESP32_RTC_CLOCK_SOURCE_EXTERNAL_CRYSTAL=
CONFIG_ESP32_RTC_CLK_CAL_CYCLES=1024
CONFIG_ESP32_DEEP_SLEEP_WAKEUP_DELAY=2000
CONFIG_ESP32_XTAL_FREQ_40=y
CONFIG_ESP32_XTAL_FREQ_26=
CONFIG_ESP32_XTAL_FREQ_AUTO=
CONFIG_ESP32_XTAL_FREQ=40
CONFIG_DISABLE_BASIC_ROM_CONSOLE=
CONFIG_ESP_TIMER_PROFILING=
CONFIG_COMPATIBLE_PRE_V2_1_BOOTLOADERS=

#
# Wi-Fi
#
CONFIG_SW_COEXIST_ENABLE=
CONFIG_ESP32_WIFI_STATIC_RX_BUFFER_NUM=10
CONFIG_ESP32_WIFI_DYNAMIC_RX_BUFFER_NUM=32
CONFIG_ESP32_WIFI_STATIC_TX_BUFFER=
CONFIG_ESP32_WIFI_DYNAMIC_TX_BUFFER=y
CONFIG_ESP32_WIFI_TX_BUFFER_TYPE=1
CONFIG_ESP32_WIFI_DYNAMIC_TX_BUFFER_NUM=32
CONFIG_ESP32_WIFI_AMPDU_TX_ENABLED=y
CONFIG_ESP32_WIFI_TX_BA_WIN=6
CONFIG_ESP32_WIFI_AMPDU_RX_ENABLED=y
CONFIG_ESP32_WIFI_RX_BA_WIN=6
CONFIG_ESP32_WIFI_NVS_ENABLED=y

#
# PHY
#
CONFIG_ESP32_PHY_CALIBRATION_AND_DATA_STORAGE=y
CONFIG_ESP32_PHY_INIT_DATA_IN_PARTITION=
CONFIG_ESP32_PHY_MAX_WIFI_TX_POWER=20
CONFIG_ESP32_PHY_MAX_TX_POWER=20

#
# Power Management
#
CONFIG_PM_ENABLE=

#
# Ethernet
#
CONFIG_DMA_RX_BUF_NUM=10
CONFIG_DMA_TX_BUF_NUM=10
CONFIG_EMAC_L2_TO_L3_RX_BUF_MODE=
CONFIG_EMAC_TASK_PRIORITY=20

#
# FAT Filesystem support
#
CONFIG_FATFS_CODEPAGE_DYNAMIC=
CONFIG_FATFS_CODEPAGE_437=y
CONFIG_FATFS_CODEPAGE_720=
CONFIG_FATFS_CODEPAGE_737=
CONFIG_FATFS_CODEPAGE_771=
CONFIG_FATFS_CODEPAGE_775=
CONFIG_FATFS_CODEPAGE_850=
CONFIG_FATFS_CODEPAGE_852=
CONFIG_FATFS_CODEPAGE_855=
CONFIG_FATFS_CODEPAGE_857=
CONFIG_FATFS_CODEPAGE_860=
CONFIG_FATFS_CODEPAGE_861=
CONFIG_FATFS_CODEPAGE_862=
CONFIG_FATFS_CODEPAGE_863=
CONFIG_FATFS_CODEPAGE_864=
CONFIG_FATFS_CODEPAGE_865=
CONFIG_FATFS_CODEPAGE_866=
CONFIG_FATFS_CODEPAGE_869=
CONFIG_FATFS_CODEPAGE_932=
CONFIG_FATFS_CODEPAGE_936=
CONFIG_FATFS_CODEPAGE_949=
CONFIG_FATFS_CODEPAGE_950=
CONFIG_FATFS_CODEPAGE=437
CONFIG_FATFS_LFN_NONE=y
CONFIG_FATFS_LFN_HEAP=
CONFIG_FATFS_LFN_STACK=
CONFIG_FATFS_FS_LOCK=0
CONFIG_FATFS_TIMEOUT_MS=10000
CONFIG_FATFS_PER_FILE_CACHE=y

#
# FreeRTOS
#
CONFIG_FREERTOS_UNICORE=
CONFIG_FREERTOS_CORETIMER_0=y
CONFIG_FREERTOS_CORETIMER_1=
CONFIG_FREERTOS_HZ=100
CONFIG_FREERTOS_ASSERT_ON_UNTESTED_FUNCTION=y
CONFIG_FREERTOS_CHECK_STACKOVERFLOW_NONE=
CONFIG_FREERTOS_CHECK_STACKOVERFLOW_PTRVAL=
CONFIG_FREERTOS_CHECK_STACKOVERFLOW_CANARY=y
CONFIG_FREERTOS_WATCHPOINT_END_OF_STACK=y
CONFIG_FREERTOS_INTERRUPT_BACKTRACE=y
CONFIG_FREERTOS_THREAD_LOCAL_STORAGE_POINTERS=1
CONFIG_FREERTOS_ASSERT_FAIL_ABORT=y
CONFIG_FREERTOS_ASSERT_FAIL_PRINT_CONTINUE=
CONFIG_FREERTOS_ASSERT_DISABLE=
CONFIG_FREERTOS_IDLE_TASK_STACKSIZE=1024
CONFIG_FREERTOS_ISR_STACKSIZE=1536
CONFIG_FREERTOS_LEGACY_HOOKS=
CONFIG_FREERTOS_MAX_TASK_NAME_LEN=16
CONFIG_SUPPORT_STATIC_ALLOCATION=
CONFIG_TIMER_TASK_PRIORITY=1
CONFIG_TIMER_TASK_STACK_DEPTH=2048
CONFIG_TIMER_QUEUE_LENGTH=10
CONFIG_FREERTOS_QUEUE_REGISTRY_SIZE=0
CONFIG_FREERTOS_USE_TRACE_FACILITY=
CONFIG_FREERTOS_GENERATE_RUN_TIME_STATS=
CONFIG_FREERTOS_DEBUG_INTERNALS=

#
# Heap memory debugging
#
CONFIG_HEAP_POISONING_DISABLED=y
CONFIG_HEAP_POISONING_LIGHT=
CONFIG_HEAP_POISONING_COMPREHENSIVE=
CONFIG_HEAP_TRACING=

#
# libsodium
#
CONFIG_LIBSODIUM_USE_MBEDTLS_SHA=y

#
# Log output
#
CONFIG_LOG_DEFAULT_LEVEL_NONE=
CONFIG_LOG_DEFAULT_LEVEL_ERROR=y
CONFIG_LOG_DEFAULT_LEVEL_WARN=
CONFIG_LOG_DEFAULT_LEVEL_INFO=
CONFIG_LOG_DEFAULT_LEVEL_DEBUG=
CONFIG_LOG_DEFAULT_LEVEL_VERBOSE=
CONFIG_LOG_DEFAULT_LEVEL=1
CONFIG_LOG_COLORS=y

#
# LWIP
#
CONFIG_L2_TO_L3_COPY=
CONFIG_LWIP_MAX_SOCKETS=10
CONFIG_LWIP_SO_REUSE=y
CONFIG_LWIP_SO_REUSE_RXTOALL=y
CONFIG_LWIP_SO_RCVBUF=
CONFIG_LWIP_DHCP_MAX_NTP_SERVERS=1
CONFIG_LWIP_IP_FRAG=
CONFIG_LWIP_IP_REASSEMBLY=
CONFIG_LWIP_STATS=
CONFIG_LWIP_ETHARP_TRUST_IP_MAC=y
CONFIG_TCPIP_RECVMBOX_SIZE=32
CONFIG_LWIP_DHCP_DOES_ARP_CHECK=y

#
# DHCP server
#
CONFIG_LWIP_DHCPS_LEASE_UNIT=60
CONFIG_LWIP_DHCPS_MAX_STATION_NUM=8
CONFIG_LWIP_AUTOIP=
CONFIG_LWIP_NETIF_LOOPBACK=y
CONFIG_LWIP_LOOPBACK_MAX_PBUFS=8

#
# TCP
#
CONFIG_LWIP_MAX_ACTIVE_TCP=16
CONFIG_LWIP_MAX_LISTENING_TCP=16
CONFIG_TCP_MAXRTX=12
CONFIG_TCP_SYNMAXRTX=6
CONFIG_TCP_MSS=1436
CONFIG_TCP_MSL=60000
CONFIG_TCP_SND_BUF_DEFAULT=5744
CONFIG_TCP_WND_DEFAULT=5744
CONFIG_TCP_RECVMBOX_SIZE=6
CONFIG_TCP_QUEUE_OOSEQ=y
CONFIG_TCP_OVERSIZE_MSS=y
CONFIG_TCP_OVERSIZE_QUARTER_MSS=
CONFIG_TCP_OVERSIZE_DISABLE=

#
# UDP
#
CONFIG_LWIP_MAX_UDP_PCBS=16
CONFIG_UDP_RECVMBOX_SIZE=6
CONFIG_TCPIP_TASK_STACK_SIZE=2560
CONFIG_PPP_SUPPORT=

#
# ICMP
#
CONFIG_LWIP_MULTICAST_PING=
CONFIG_LWIP_BROADCAST_PING=

#
# LWIP RAW API
#
CONFIG_LWIP_MAX_RAW_PCBS=16

#
# mbedTLS
#
CONFIG_MBEDTLS_SSL_MAX_CONTENT_LEN=16384
CONFIG_MBEDTLS_DEBUG=
CONFIG_MBEDTLS_HARDWARE_AES=y
CONFIG_MBEDTLS_HARDWARE_MPI=
CONFIG_MBEDTLS_HARDWARE_SHA=
CONFIG_MBEDTLS_HAVE_TIME=y
CONFIG_MBEDTLS_HAVE_TIME_DATE=
CONFIG_MBEDTLS_TLS_SERVER_AND_CLIENT=y
CONFIG_MBEDTLS_TLS_SERVER_ONLY=
CONFIG_MBEDTLS_TLS_CLIENT_ONLY=
CONFIG_MBEDTLS_TLS_DISABLED=
CONFIG_MBEDTLS_TLS_SERVER=y
CONFIG_MBEDTLS_TLS_CLIENT=y
CONFIG_MBEDTLS_TLS_ENABLED=y

#
# TLS Key Exchange Methods
#
CONFIG_MBEDTLS_PSK_MODES=
CONFIG_MBEDTLS_KEY_EXCHANGE_RSA=y
CONFIG_MBEDTLS_KEY_EXCHANGE_DHE_RSA=y
CONFIG_MBEDTLS_KEY_EXCHANGE_ELLIPTIC_CURVE=y
CONFIG_MBEDTLS_KEY_EXCHANGE_ECDHE_RSA=y
CONFIG_MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA=y
CONFIG_MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA=y
CONFIG_MBEDTLS_KEY_EXCHANGE_ECDH_RSA=y
CONFIG_MBEDTLS_SSL_RENEGOTIATION=y
CONFIG_MBEDTLS_SSL_PROTO_SSL3=
CONFIG_MBEDTLS_SSL_PROTO_TLS1=y
CONFIG_MBEDTLS_SSL_PROTO_TLS1_1=y
CONFIG_MBEDTLS_SSL_PROTO_TLS1_2=y
CONFIG_MBEDTLS_SSL_PROTO_DTLS=
CONFIG_MBEDTLS_SSL_ALPN=y
CONFIG_MBEDTLS_SSL_SESSION_TICKETS=y

#
# Symmetric Ciphers
#
CONFIG_MBEDTLS_AES_C=y
CONFIG_MBEDTLS_CAMELLIA_C=
CONFIG_MBEDTLS_DES_C=
CONFIG_MBEDTLS_RC4_DISABLED=y
CONFIG_MBEDTLS_RC4_ENABLED_NO_DEFAULT=
CONFIG_MBEDTLS_RC4_ENABLED=
CONFIG_MBEDTLS_BLOWFISH_C=
CONFIG_MBEDTLS_XTEA_C=
CONFIG_MBEDTLS_CCM_C=y
CONFIG_MBEDTLS_GCM_C=y
CONFIG_MBEDTLS_RIPEMD160_C=

#
# Certificates
#
CONFIG_MBEDTLS_PEM_PARSE_C=y
CONFIG_MBEDTLS_PEM_WRITE_C=y
CONFIG_MBEDTLS_X509_CRL_PARSE_C=y
CONFIG_MBEDTLS_X509_CSR_PARSE_C=y
CONFIG_MBEDTLS_ECP_C=y
CONFIG_MBEDTLS_ECDH_C=y
CONFIG_MBEDTLS_ECDSA_C=y
CONFIG_MBEDTLS_ECP_DP_SECP192R1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_SECP224R1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_SECP256R1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_SECP384R1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_SECP521R1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_SECP192K1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_SECP224K1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_SECP256K1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_BP256R1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_BP384R1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_BP512R1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_CURVE25519_ENABLED=y
CONFIG_MBEDTLS_ECP_NIST_OPTIM=y

#
# OpenSSL
#
CONFIG_OPENSSL_DEBUG=
CONFIG_OPENSSL_ASSERT_DO_NOTHING=y
CONFIG_OPENSSL_ASSERT_EXIT=

#
# PThreads
#
CONFIG_ESP32_PTHREAD_TASK_PRIO_DEFAULT=5
CONFIG_ESP32_PTHREAD_TASK_STACK_SIZE_DEFAULT=2048

#
# SPI Flash driver
#
CONFIG_SPI_FLASH_VERIFY_WRITE=
CONFIG_SPI_FLASH_ENABLE_COUNTERS=
CONFIG_SPI_FLASH_ROM_DRIVER_PATCH=y
CONFIG_SPI_FLASH_WRITING_DANGEROUS_REGIONS_ABORTS=y
CONFIG_SPI_FLASH_WRITING_DANGEROUS_REGIONS_FAILS=
CONFIG_SPI_FLASH_WRITING_DANGEROUS_REGIONS_ALLOWED=

#
# SPIFFS Configuration
#
CONFIG_SPIFFS_MAX_PARTITIONS=3

#
# SPIFFS Cache Configuration
#
CONFIG_SPIFFS_CACHE=y
CONFIG_SPIFFS_CACHE_WR=y
CONFIG_SPIFFS_CACHE_STATS=
CONFIG_SPIFFS_PAGE_CHECK=y
CONFIG_SPIFFS_GC_MAX_RUNS=10
CONFIG_SPIFFS_GC_STATS=
CONFIG_SPIFFS_OBJ_NAME_LEN=32
CONFIG_SPIFFS_USE_MAGIC=y
CONFIG_SPIFFS_USE_MAGIC_LENGTH=y
CONFIG_SPIFFS_META_LENGTH=4
CONFIG_SPIFFS_USE_MTIME=y

#
# Debug Configuration
#
CONFIG_SPIFFS_DBG=
CONFIG_SPIFFS_API_DBG=
CONFIG_SPIFFS_GC_DBG=
CONFIG_SPIFFS_CACHE_DBG=
CONFIG_SPIFFS_CHECK_DBG=
CONFIG_SPIFFS_TEST_VISUALISATION=

#
# tcpip adapter
#
CONFIG_IP_LOST_TIMER_INTERVAL=120

#
# Wear Levelling
#
CONFIG_WL_SECTOR_SIZE_512=
CONFIG_WL_SECTOR_SIZE_4096=y
CONFIG_WL_SECTOR_SIZE=4096