1.12.0

📈 Added

• ESP-IDF:

  • The SDK now supports being installed as an
    ESP Component from the Espressif
    registry, by adding the following lines to an esp-idf project's
    idf_component.yml manifest:

    dependencies:
      memfault/memfault-firmware-sdk:
        version: "1.12.0"

  • Heap Allocation Tracking is
    now enabled by default for ESP-IDF projects, controlled with the Kconfig
    symbol CONFIG_MEMFAULT_HEAP_STATS. The Memfault Trace UI will show
    information about the most recent heap allocations for malloc() calls.

🛠️ Changed

• ESP-IDF:

  • The Memfault Build ID will be
    applied by default, controlled by the Kconfig setting
    CONFIG_MEMFAULT_USE_MEMFAULT_BUILD_ID. This is only valid for ESP-IDF
    versions >= 4.2.5 , and will cause a build error on older versions,
    requiring it to be set to n. Updating to this version of the SDK will
    require removing the similar logic in the project's CMakeLists.txt
    file (a build error will occur if both are present).

  • The Memfault Core Vital for
    Periodic Connectivity
    will now count failures to sync Memfault data if the HTTP connection cannot
    be established, but WiFi connectivity is available. This can occur when the
    WAN connection is down but the access point is still up, or if there is an
    external DNS failure. Previously this was not counted as a failure.

• Zephyr

  • The Memfault HTTP client, enabled with Kconfig
    CONFIG_MEMFAULT_HTTP_ENABLE, requires POSIX_API to be enabled on newer
    versions of Zephyr. Previously, not explicitly enabling POSIX_API would
    result in a build error. Update it to be enabled by default in the Zephyr
    SDK, via Kconfig imply POSIX_API.

  • Zephyr 3.7.0+ requires enabling CONFIG_MBEDTLS_SHA1 when using Zephyr's
    mbedtls implementation. Memfault added a build-time check for this setting
    in Memfault SDK 1.11.2, but that check would also trip when not using
    Zephyr's mbedtls implementation. Update the build check to be more precise.

• nRF-Connect SDK:

  • Minor changes to provide compatibility with NCS versions > 2.7.0, which
    target a Zephyr fork that is compatible with 3.7.0 but provides a
    "development" version number, 3.6.99.

🐛 Fixed

• ESP-IDF:

  • Corrected a theoretical integer overflow issue in the demo CLI crash
    command, detected by static analysis tools. The impacted function was and is
    exclusively called with an argument of 10, so this issue was not
    exploitable in practice.

1.11.5

📈 Added

• Zephyr:

  • Add the following built-in WiFi metrics for Zephyr devices, enabled by
    default on systems with WiFi:

    • wifi_connected_time_ms : time in milliseconds the device has been
      connected to a WiFi network
    • wifi_disconnect_count : number of times the device has disconnected from
      a WiFi network
    • wifi_ap_oui : the OUI of the WiFi AP the device is connected to

    The metrics can be disabled by setting CONFIG_MEMFAULT_METRICS_WIFI=n.

  • The Memfault Zephyr fault handler now labels faults as Stack Overflow, Bus
    Fault, MemManage Fault, and Usage Fault, among others, in addition to the
    existing Hard Fault label. Note that this does not change the types of
    faults collected (all these faults are already supported), but it does
    correct the label presented in the Memfault UI.

  • Add a new test command, mflt test stack_overflow, that will trigger a
    stack overflow fault when CONFIG_STACK_SENTINEL or
    CONFIG_MPU_STACK_GUARD is enabled.

  • The cpu_temp metric has been renamed to thermal_cpu_c to better reflect
    the metric's purpose. The metric is still collected by default on platforms
    with an enabled die-temp0 sensor, and can be disabled by setting
    CONFIG_MEMFAULT_METRICS_CPU_TEMP=n.

  • Add a new metric, memory_pct_max, which captures the max percentage of the
    heap used. It is enabled by default. This metric and the existing
    Heap_BytesFree metric are controlled with
    CONFIG_MEMFAULT_METRICS_MEMORY_USAGE.

• ESP-IDF:

  • Add an option to upload logs by default when using
    MEMFAULT_HTTP_PERIODIC_UPLOAD, controlled with the Kconfig symbol
    MEMFAULT_HTTP_PERIODIC_UPLOAD_LOGS. This can also be controlled at runtime
    with the included API
    memfault_esp_port_http_periodic_upload_logs(bool enable)

  • Add a new metric, memory_pct_max, which captures the max percentage of the
    heap used. It is enabled by default. This metric and the existing heap_*
    metrics are now controlled with CONFIG_MEMFAULT_METRICS_MEMORY_USAGE.

  • Print the Memfault OTA URL from memfault_esp_port_ota_update() when a new
    update is available, for example:

    esp32> memfault_ota_check
    I (98125) mflt: Checking for OTA Update
    Download URL: https://ota-cdn.memfault.com/2950/9757/19036619757?token=0123456789abcdef&expires=1726192800&v=2
    I (98775) mflt: Update available!
    
    esp32> memfault_ota_perform
    I (15515) mflt: Checking for OTA Update
    Download URL: https://ota-cdn.memfault.com/2950/9757/19036619757?token=0123456789abcdef&expires=1726192800&v=2
    I (16205) mflt: Starting OTA download ...

🛠️ Changed

• Zephyr:

  • The cpu_temp metric has been renamed to thermal_cpu_c to better reflect
    the metric's purpose. The metric is still collected by default on platforms
    with an enabled die-temp0 sensor, and can be disabled by setting
    CONFIG_MEMFAULT_METRICS_CPU_TEMP=n.

• ESP-IDF:

  • The cpu_temp metric has been renamed to thermal_cpu_c to better reflect
    the metric's purpose. The metric is still collected by default on ESP32
    variants that support it (all but ESP32), and can be disabled by setting
    CONFIG_MEMFAULT_METRICS_CPU_TEMP=n.

  • The Kconfig CONFIG_MEMFAULT_ESP_HEAP_METRICS has been replaced with
    CONFIG_MEMFAULT_METRICS_MEMORY_USAGE.

1.11.4

See CHANGELOG.md for release notes.

1.11.3

See CHANGELOG.md for release notes.

1.11.2

See CHANGELOG.md for release notes.

1.11.1

See CHANGELOG.md for release notes.

1.11.0

See CHANGELOG.md for release notes.

1.10.1

See CHANGELOG.md for release notes.

1.10.0

See CHANGELOG.md for release notes.

1.9.4

See CHANGELOG.md for release notes.