July 2026 monthly summary for the developer team across nrfconnect SDKs. Delivered reliability and protocol improvements in nrfxlib and nrf repos, aligned with the upcoming NCS release. Highlights include a SoftDevice Controller revision update (84d638af...) with refined data-length negotiation and advertising reliability, plus a fix for Periodic Advertising with Responses. Implemented an MPSL fix to prevent hangs on HFCLK24M after uninit on the nRF54LM series. Updated MPSL documentation with a known-issues workaround for nRF54LM20. Manifest files across platforms were synchronized to reflect revisions and ensure reproducible builds. These changes were implemented with commits 01c86c07e7d6262a5b737e9b8d11a623cb9ee22e, 37a991b99bc7dabe85825bd15be9c37db449c524, and 54a239139ba1aaf9880f24881bb195b829b5e7ec.

June 2026: Delivered stable Bluetooth samples by disabling Partition Manager by default, advanced MPSL library revisions with header guards for better resource allocation, and SoftDevice Controller enhancements including security commands, interval optimization, and a critical Periodic Advertising with Responses fix. Focused on reliability, performance, and maintainability to enable smoother product integration.

May 2026 — nrfconnect/sdk-nrf delivered three core Bluetooth controller enhancements and a data-path optimization, focused on memory efficiency and reliable data handling for constrained devices. Key features: 1) Bluetooth Controller API Enhancements with Granular Garbage Collection to enable granular linker GC of unused code when a single link role is used, reducing NVM/RAM usage. Commit: 82b7058329869118a3d77dd2492111d92a031625. 2) Flushable ACL Data HCI Commands Support (config-guarded) to add controller support behind CONFIG_BT_CTLR_LE_FLUSHABLE_ACL_DATA, improving Bluetooth data handling. Commit: 84356403e02eb30351e1683d43197da054eb1e2b. 3) SDC HCI Driver Memcpy Optimization with MPSL to use MPSL’s internal optimized memcpy for SDC HCI data, improving performance without extra NVM cost. Commit: c81a0368bbea196c193f0cfdbca05353b6fb6731.

April 2026 monthly summary: Delivered targeted enhancements and fixes across two Nordic SDK repositories (sdk-nrfxlib and sdk-nrf) to improve build reliability, runtime performance, and memory efficiency. Key outcomes include manifest synchronization for MPSL Front-End, SoftDevice Controller performance improvements, and new SDC Channel Sounding APIs that optimize NVM usage. These changes reduce build drift, enhance central-device performance, and shrink memory footprint for deployments with limited NVM.

March 2026 performance summary: Across sdk-nrfxlib and sdk-nrf, delivered versioning reliability improvements and BLE capability exploration with a focus on reliability, traceability, and early-stage feature testing. Key outcomes include: - MPSL Front-End Manifest Versioning Synchronization: synchronized manifest files to reflect latest git revision and timestamps, enabling accurate cross-component version tracking and safer releases. - Experimental Bluetooth LE Features: added experimental support for LE Flushable ACL Data and LE Read/Write Automatic Flush Timeout HCI commands, expanding BLE data path capabilities for future hardware support. - QoS Channel Survey Stability: removed the experimental designation; QoS Channel Survey is now a stable feature in Bluetooth controller configuration, reducing deployment risk. - LE Flushable ACL Data Support (Experimental): added experimental support for LE Flushable ACL Data in SDC, including HCI commands for automatic flush timeout and associated flags. Overall impact: enhanced release traceability and risk management, accelerated groundwork for next-gen Bluetooth capabilities, and strengthened readiness for upcoming hardware features. Technologies/skills demonstrated: Git-driven version management and CHANGELOG governance, SDC (SoftDevice Controller) integration, BLE HCI command handling, and governance of experimental vs. stable features.

In January 2026, delivered a targeted bug fix for NRF700x coexistence GPIO toggling and state handling on the nRF54H within the nrfconnect/sdk-nrf repo, improving the reliability of the coexistence driver and overall hardware coordination. The work included updates to 1wire/3wire coexistence paths, GPIO retention configuration, and careful handling of active-low/active-high states, avoiding Zephyr GPIO API reads for the grant pin, and aligning with NCSDK-37045. This reduces risk of mis-toggles and ensures proper coexistence behavior in production environments.

December 2025 monthly summary for the nrfconnect/sdk-nrf repo. Focused on improving cross-environment log rendering for Bluetooth SCI samples by addressing Unicode rendering constraints. Delivered a targeted bug fix with clear commit history, enhancing log readability in CI pipelines and customer terminals that lack Unicode support. Maintained API stability while improving robustness and cross-system compatibility.

Monthly summary for 2025-11 covering nrfconnect/sdk-nrfxlib, nrfconnect/sdk-zephyr, and nrfconnect/sdk-nrf. Delivered a focused set of BLE enhancements, stability fixes, and build-consistency improvements across three repos. Demonstrated strong collaboration with the Bluetooth stack (SoftDevice Controller) and Zephyr integration, advancing both feature parity with latest specs and operational robustness.

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.