October 2025 — nrfconnect/sdk-nrf: API compatibility cleanup and BSP improvements. Delivered Bluetooth HCI Driver API compatibility cleanup aligning with the updated SDC API, and MPSL CX driver BSP compatibility for bsims via conditional GPIO access, reducing platform-specific issues and enabling smoother future integrations.

2025-09 Monthly Summary: Delivered targeted releases and optimizations across the NRF BLE stack with a focus on stability, memory efficiency, and extended feature support. Business value includes improved BLE control capabilities (Channel Sounding HCI commands), reduced memory footprint for LE Extended Feature Set, and deterministic builds through manifest alignment. Key technical achievements include: - SDK-NRFXLIB: Release notes consolidation for GRTC, Scheduler, Clock fixes, and introduction of vendor-specific Channel Sounding (CS) HCI commands; aligns with new MPSL and SoftDevice Controller revisions. Commits: 44bcb8973a44215e8b1172d09f57ff1c0ea8424a, de48963e8927d0196bd7a60f3bb0329bdd8304a3. - SDK-NRFXLIB: SoftDevice Controller revision with configurable number of extended feature pages and updated memory calculation macros for extended feature sets. Commit: 697969e76e88c57ee1d6733f37723b07463286c8. - SDK-NRFXLIB: MPSL dependency alignment with manifest revision updates to ensure consistent dependency tracking and builds. Commit: 833505dc549a19acd3913599119e6cb792880704. - SDK-NRF: Bluetooth LE Controller memory optimization via configurable cap on remote feature pages for the Extended Feature Set, reducing memory usage. Commit: 39b81b86c837476890474ce4281e36dcc3266f60.

Summary for 2025-08 (nrfconnect/sdk-nrfxlib) Key features delivered: - MPSL Clock Source API Update: introduced a new high-frequency clock source management API; deprecated the legacy API; updated CHANGELOG and clock documentation; refreshed submodule manifests with new revision/timestamp. Commit: 1cea4b9e5712f81838e20d193ccbcdb8be77d077. - SoftDevice Controller Extensions for BLE feature sets and HCI updates: added memory calculation macros and API functions for extended feature sets and frame space; defined new HCI commands/events for reading local and remote supported features; enhances BLE operations. Commit: d4b4d0ff6f2f2f57eb772215238eb4c1c0d4fdf2. - Documentation and manifests: updated docs/CHANGELOG and submodule manifests to align with API changes and ensure reproducible builds. Major bugs fixed: - None reported in this period. Overall impact and accomplishments: - Improved clock management capabilities and BLE feature support, enabling more robust, scalable deployments across Nordic platforms; reduced integration risk via explicit deprecations and updated manifests; positioned the codebase for upcoming hardware and BLE features. Technologies/skills demonstrated: - API design and deprecation strategy, C macros for memory calculations, low-level BLE/HCI feature engineering, documentation/changelog discipline, and submodule/version management.

Concise monthly summary for 2025-07 focusing on key accomplishments, features delivered, bugs fixed, and impact. Delivered a static partition manager configuration for the Xiao_ble board to ensure out-of-the-box compatibility with Nordic Connect SDK/NCS. Defined memory regions for softdevice, application, settings storage, and UF2 partition to align behavior with sysbuild-disabled scenarios, improving developer experience and board compatibility. No major bugs fixed this month; primary value came from robust configuration and smoother onboarding. Overall impact: accelerated board readiness, reduced build/config friction, and clearer memory partitioning that supports reliable device firmware deployments. Technologies/skills demonstrated: embedded firmware development, memory partitioning, static partition manager configuration, Zephyr build configuration, and Nordic SDK integration.

For May 2025, delivered cross-repo platform enhancements enabling nRF71-series support in the SDC/MPSL stack, tuned UART HCI usage on the nRF7120 PDK, and aligned MPSL/SoftDevice Controller revisions and configurations across device families. The work broadens device compatibility, reduces integration friction, and positions the SDKs for broader customer adoption of the nRF71 line.

April 2025 monthly summary focused on delivering resource-efficient BLE configurations for the nRF54L series, improving cross-module consistency, and laying groundwork for new device support in the SoftDevice Controller. Key changes were implemented in two repositories to optimize resource use, align manifests, and prototype support for additional devices, driving performance, reliability, and broader platform capability.

During November 2024, NordicBuilder/sdk-nrf delivered the Bluetooth Ranging Service (RAS) foundation and Ranging Responder (RRSP) capabilities, including scaffolding, header files, service UUIDs, and data structures, with RRSP server integration and a Channel Sounding Reflector sample. A CODEOWNERS update designated sole ownership for the RAS directory to improve development velocity and maintainability. The work enables a RREQ-to-RRSP data path and demonstrates end-to-end ranging data transfer using notifications, laying a solid foundation for scalable, interoperable ranging features in future releases.