1.24.0

📈 Added

• General:

  • Add a new API, memfault_log_get_unsent_count(), which returns the log
    count and size in bytes of unsent logs in the log buffer. This can be used
    inside memfault_log_handle_saved_callback() for example to drain the
    packetized logs when a certain watermark is reached.

• ESP-IDF:

  • Add a Kconfig option, CONFIG_MEMFAULT_TIME_SINCE_BOOT_CUSTOM, which when
    set =n, enables using a custom implementation of
    memfault_platform_get_time_since_boot_ms().

  • Add 2 new metrics for tracking raw network bytes rx / tx. These metrics
    track network IO traffic on the default netif:

    • network_rx_bytes
    • network_tx_bytes

    These metrics are enabled by default, and can be disabled with
    CONFIG_MEMFAULT_METRICS_NETWORK_IO=n

🛠️ Changed

• FreeRTOS (including ESP-IDF):

  • Rename the thread stack usage measurement variable included in coredumps
    when MEMFAULT_COREDUMP_COMPUTE_THREAD_STACK_USAGE is enabled from
    high_watermark to stack_unused. This change is to make the
    implementation more readable. The Memfault backend is updated to process
    both the old and new formats.

  • FreeRTOS-detected stack overflows (via vApplicationStackOverflowHook) will
    now be correctly tagged as Stack Overflow for the trace reason in
    Memfault, instead of Assert.

🐛 Fixed

• Zephyr:

  • Fix a null dereference when calling
    memfault_coredump_storage_compute_size_required() (eg the shell command
    mflt coredump_size).

• General:

  • For the emlib WDOG port implementation,
    ports/emlib/wdog_software_watchdog.c,
    enable the WDOG when in EM1 mode for series2 chips.

  • Added support for MEMFAULT_REBOOT_REASON_CLEAR in the
    ports/nrf5_sdk/resetreas_reboot_tracking.c
    implementation, by default enabled (like other ports). This permits opting
    out of the auto-clearing of the NRF_POWER->RESETREAS register, in case the
    user needs it after the function runs.

• FreeRTOS (including ESP-IDF):

  • Fix incorrect computation of per-thread stack usage metrics
    (MEMFAULT_FREERTOS_COLLECT_THREAD_METRICS). Before this fix, the returned
    values had 2 errors:

    1. the value is the unused stack space, not the used stack space
    2. on platforms where sizeof(StackType_t) is not 1 byte, the numerator
       when computing percentage is incorrectly scaled down by
       sizeof(StackType_t), resulting in significant under-reporting of the
       stack usage percentage.

    Users can apply device and software version filtering on dashboards to
    filter out reports from devices that are running an old version of the SDK.

• ESP-IDF:

  • Fix a potential issue that would cause the wrong implementation of
    memfault_platform_time_get_current() to be included in the final link,
    when CONFIG_MEMFAULT_SYSTEM_TIME=y is enabled (default).

🛠️ Changed

• ESP-IDF:

  • CONFIG_MEMFAULT_ENABLE_REBOOT_DIAG_DUMP now defaults to y instead of
    n, to print out the reboot reason on boot. Disable it with
    CONFIG_MEMFAULT_ENABLE_REBOOT_DIAG_DUMP=n.