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Simen S. Røstad

PROFILE

Simen S. Røstad

Worked extensively on the nrfconnect/Asset-Tracker-Template and sdk-nrf repositories, delivering robust IoT firmware and cloud integration features for asset tracking devices. Focused on embedded C and Python, the work included developing modular firmware update flows, optimizing power management, and enhancing cloud provisioning and telemetry pipelines. Leveraging Zephyr RTOS and MQTT, the developer improved device reliability through stack tuning, event-driven state machines, and persistent configuration management. CI/CD pipelines were modernized using GitHub Actions, enabling faster, more reliable releases. Documentation and onboarding guides were continuously updated, ensuring maintainability and accelerating developer adoption across evolving embedded and cloud-connected workflows.

Overall Statistics

Feature vs Bugs

69%Features

Repository Contributions

199Total
Bugs
37
Commits
199
Features
83
Lines of code
61,668
Activity Months17

Work History

March 2026

4 Commits • 2 Features

Mar 1, 2026

Month: 2026-03 — Focused on delivering performance and reliability improvements for Asset Tracker, with a strong emphasis on power efficiency and developer velocity through CI/CD modernization. Key work included a Wi‑Fi scanning optimization to 2.4 GHz-only by default, significantly improving location service responsiveness and reducing scan times and power consumption. In parallel, CI/CD and build-system modernization streamlined release processes and enhanced nightly validation. No user-facing defects were logged this month; the work delivered measurable business value through faster feature delivery, clearer release artifacts, and more robust testing.

February 2026

32 Commits • 20 Features

Feb 1, 2026

February 2026 performance: Delivered targeted reliability improvements, feature enhancements, and CI/observability improvements across two key repos (Asset-Tracker-Template and sdk-nrf). Focus areas included power management reliability, persistent fuel gauge state, improved CI artifacts for debugging, cloud/network observability, and enhanced MEMFAULT location metrics. These changes reduced build warnings, improved boot persistence, and increased release hygiene and diagnostics, enabling faster issue resolution and more stable deployments.

January 2026

7 Commits • 2 Features

Jan 1, 2026

January 2026 performance summary for the Asset-Tracker-Template repository. Delivered user-facing improvements to firmware updates and provisioning, while hardening runtime stability through stack tuning and testing. These efforts reduce update downtime, streamline device reprovisioning, and improve CI reliability for field deployments.

December 2025

14 Commits • 5 Features

Dec 1, 2025

December 2025 monthly summary highlighting delivery of telemetry and cloud data enhancements, Wi‑Fi reliability improvements, CLI usability improvements, system stability enhancements, and early boot metrics posting. Work spans two repositories (Asset-Tracker-Template and sdk-nrf) delivering measurable business value through improved reliability, faster device health visibility, and streamlined tooling.

November 2025

1 Commits

Nov 1, 2025

Month: 2025-11 — Asset-Tracker-Template (nrfconnect) monthly summary focusing on Cloud Location Service reliability and Wi‑Fi data handling. Reverted a prior invalid location request fix and adjusted Wi‑Fi data handling to restore stable cloud location behavior, improving data quality and production reliability.

October 2025

17 Commits • 5 Features

Oct 1, 2025

October 2025 monthly summary for Asset tracking and RF stack improvements across nrfconnect/Asset-Tracker-Template and nrfconnect/sdk-nrf. Focused on reliability, testing rigor, power management, CI quality, and documentation to accelerate deployment, reduce field failures, and support faster iterations with robust tests and clear guidance.

September 2025

26 Commits • 10 Features

Sep 1, 2025

2025-09 Monthly Summary: Consolidated cross-repo delivery focused on stability, reliability, and cloud provisioning for Asset-Tracker Template and related projects. Key work spans manifest/toolchain alignment, reliability improvements, cloud provisioning enhancements, FOTA robustness, and CI/build stabilization. Business value centers on longer device uptime, more robust firmware updates, and smoother release cycles.

August 2025

3 Commits • 2 Features

Aug 1, 2025

August 2025 monthly summary focusing on delivering documentation improvements and reliability fixes across two key repositories. Highlights include updated modular architecture documentation for the MQTT sample, a reliability refactor to the MQTT transport state handling using a private ZBUS event channel, and an expanded modem tracing troubleshooting guide for the Asset Tracker Template with DTS support. These efforts reduce onboarding time, improve developer confidence, and enhance the maintainability and diagnosability of deployed features.

July 2025

2 Commits • 1 Features

Jul 1, 2025

July 2025 monthly summary: Delivered targeted enhancements and a critical bug fix across two NRF ecosystem repos. In Asset-Tracker-Template, added Memfault debug-level logging by updating platform configs, enabling richer diagnostics for production issues (commit 700122b1da730cf3448beafbea73c98aa010519c). In sdk-nrf, fixed FOTA polling timeout handling by returning -ETIMEDOUT and updating API docs (commit a75041c8c10962f659c88fdff236a21d91ed90b0). Overall impact: improved observability, more reliable OTA workflows, and clearer developer guidance. Key skills demonstrated: embedded C/config changes, Memfault integration, OTA mechanisms, API documentation, cross-repo collaboration. Business value: faster troubleshooting, reduced outage durations, and safer OTA deployment.

June 2025

9 Commits • 4 Features

Jun 1, 2025

June 2025 performance summary: Focused on stability, provisioning reliability, and cloud connectivity across two repositories. Key features delivered include RAM optimization for the Thingy91x TFM/MCUboot path and enhancements to the NRF provisioning API, along with downloader error reporting improvements. Asset-Tracker-Template received substantial reliability upgrades (stack sizing, CoAP/FOTA timeouts), and cloud connectivity resilience with backoff/retry handling.

May 2025

15 Commits • 4 Features

May 1, 2025

May 2025: Delivered major cloud integration, provisioning, and event features for the Asset Tracker Template, alongside CI/test workflow optimizations. Key outcomes include integrating the Cloud MQTT module across code, build, tests and documentation to enable robust MQTT-based cloud features; adding NRF Cloud provisioning via device shadow with on-target tests; implementing custom ZBus power-event signals with LED patterns and documentation; and cleaning and tightening CI/CD tooling to reduce test overhead and improve maintenance. Business value includes faster time-to-value for cloud features, more reliable device provisioning and state management, improved power-event handling, and lower ongoing maintenance costs. Technical highlights include CA certificate handling, Kconfig corrections, CBOR parsing updates, and patch automation tooling.

April 2025

16 Commits • 4 Features

Apr 1, 2025

April 2025 monthly summary focusing on delivering debugging, customization, and reliability improvements for the Asset Tracker Template. Emphasis on enabling deeper telemetry, easier customization, better documentation, and stronger CI processes to reduce integration risk and accelerate customer value.

March 2025

18 Commits • 8 Features

Mar 1, 2025

March 2025 performance summary for Asset Tracker Template and sdk-nrf: - Delivered robust FOTA reliability enhancements and expanded testing coverage, including a cloud-initiated cancellation test and improved network error handling, enabling safer, faster OTA deployments across devices. Refactoring and new test scaffolding contributed to more stable release cycles (commits: 075b2075..., 6e41a4aa..., 0742f945...). - Restructured Power Management to a dedicated module with VBUS-driven UART control, enabling dynamic power optimization and clearer separation of concerns. This reduced UART activity during idle periods and improved battery life in field deployments (commits: 69a0447f..., de53c92e..., ee84ae2e..., 2d87ac26..., 4586b120...). - Enhanced Cloud Shadow handling with CBOR encoding/decoding and unified messaging, resulting in cleaner cloud interactions and more efficient data processing (commits: 6b9e39c7..., 26543a44..., dd4d13fc...). - Build system, documentation, and maintenance improvements that lower onboarding costs and simplify configuration, including initial docs scaffolding, optional module support, and centralized shell layout (commits: 6ee37437..., b1c169e6..., 809edc49..., afefacdb...). - sdk-nrf enhancements expanded FOTA capabilities with asynchronous update application API and improved polling for job cancellations, plus Memfault integration for modem trace uploads to improve crash diagnosis, and a deprecation path for Asset Tracker v2 with new guidance folders (commits: 3dfe9726..., 9b2964be..., d68f1339...).

February 2025

17 Commits • 6 Features

Feb 1, 2025

February 2025: Consolidated platform improvements across Asset Tracker templates and sdk-nrf to deliver a simpler, more robust update flow, stronger location intelligence, and configurable networking capabilities, while maintaining a steady cadence of quality improvements. Key achievements and outcomes: - Memfault integration into NCS: Removed standalone Memfault module and integrated Memfault functionality into the NCS integration to simplify app structure and reduce maintenance overhead. Commit d5f0b2d3967dc9afe5e97b878ed9813bed4a98a2. - FOTA overhaul with state-driven update workflow: Refactored FOTA to align with state diagrams, introduced new states (downloading, network disconnect pending, image apply pending, rebooting), improved error handling, updated channels/messages, and enhanced offline handling and test coverage. Commits include e2ce4af9507acf671acf2de29acf00edf2e17a08; beb47dcca16fc0513586ee0147ca13d2b5f61358; 334d8f1089ddd92e4c247821910d45999ada7859; 7cb2c7ad8543868d36c998a078fcce62d8074f5e; 60749c882d2f07517c2d0a74fd05aea7c455b407; 099167070c3059a490386cc707ad5703a90530a9; 852f7c2b1d5258ed4e48c5dd0519e6071327f957. - Location prioritization and enhanced strategy: Refactored location module to prioritize Wi‑Fi, then GNSS, then Cellular; ensured GNSS is always enabled and used based on indoor detection; updated main module sequencing for location-first workflows. Commits: 81830d392604595d89884e4f831c52797ee42f4b; b533f6310173bea7f824008e7a1158a120ec19cb; 6fdc22fac22c8bc2ba8a065618dc11bcc6718628. - Cloud CoAP confirmable messages option: Added an optional setting to control whether CoAP messages from cloud are confirmable, enabling retransmissions until acknowledgment. Commit 12624a82cfb6796aaa225fd66504366287b1549b. - Network quality sampling configuration (Kconfig): Introduced a Kconfig option to enable/disable network quality sampling, disabled by default until a firmware fix is available. Commit 80e607fd1e2afc33478a87ba276b1c548263353e. - Test suite reliability improvements: Improved test reliability and readability by reducing UART noise, renaming tests to reflect functionality, and adjusting timeouts. Commits: 632507188aeb06243b49c408ed2096f05e5bb8c4; 19e583814ffa0f262b1529e04c03ea7386431e42; 6d28d4478894c531ee02e93bb53d5e06123cab60. - sdk-nrf: Deprecate Thingy91 support in Asset Tracker v2 (LwM2M and debug builds): Removed Thingy91 support to address memory constraints and simplify build configurations. Commit 77bce5c979fc5f87373eef4d79a0905a6e8cbb97.

January 2025

7 Commits • 5 Features

Jan 1, 2025

January 2025 monthly summary highlighting key features delivered, major bugs fixed, and impact across Asset-Tracker-Template and sdk-nrf. The work focused on reliability, cloud telemetry, and sensor data pipeline improvements, with work that enhances remote monitoring, reduces complexity, and improves data quality.

November 2024

6 Commits • 3 Features

Nov 1, 2024

November 2024: Key reliability and usability improvements across NordicBuilder/sdk-nrf and hello-nrfcloud/firmware. Achievements include stabilizing AWS IoT connectivity for Light Bulb via MBEDTLS SHA-384 support, enhancing LED PWM brightness and color control, standardizing workspace documentation for faster onboarding, and upgrading a core dependency to the latest v2.8.0-rc2. All changes delivered with traceable commits to support stable production releases.

October 2024

5 Commits • 2 Features

Oct 1, 2024

October 2024: Stability, reliability, and visibility improvements across firmware and SDK layers with measurable business value. This month delivered: - Reduced build/configuration conflicts and CoAP security tag duplicates in hello-nrfcloud/firmware, enabling smoother Memfault integration and more stable deployments. - Improved device boot reliability and CoAP debugging in NRF Cloud workflows by updating sdk-nrf, removing a legacy UART shim, and enabling decoded DTLS traces. - Increased network resilience in NordicBuilder/sdk-nrf with stack-size hardening for the cellular location path, mitigating potential stack overflows during AP scanning. - Ensured robust MQTT messaging by introducing non-zero MQTT message IDs, eliminating zero IDs caused by type casts. Overall impact: Lower field failure rates, faster debugging, more reliable boot and messaging, enabling safer over-the-air updates and stronger IoT device uptime. Technologies/skills demonstrated: embedded firmware development, memory/configuration management, debugging with DTLS traces, stack sizing and memory tuning, MQTT ID handling, version control hygiene.

Activity

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Quality Metrics

Correctness91.2%
Maintainability89.4%
Architecture87.6%
Performance83.4%
AI Usage20.4%

Skills & Technologies

Programming Languages

BashCC++CMakeCmakeConfigurationDevice TreeKconfigMakefileMarkdown

Technical Skills

API DesignAPI DevelopmentAPI developmentAutomationBuild System ConfigurationBuild System IntegrationBuild SystemsC ProgrammingC programmingCI/CDCMakeCellular IoTCloud CommunicationCloud IntegrationCode Refactoring

Repositories Contributed To

5 repos

Overview of all repositories you've contributed to across your timeline

nrfconnect/Asset-Tracker-Template

Jan 2025 Mar 2026
15 Months active

Languages Used

CPythonCMakeCmakeKconfigMarkdownYAMLBash

Technical Skills

C ProgrammingCommunication ProtocolsDevice DriversEmbedded SystemsFirmware DevelopmentIoT

nrfconnect/sdk-nrf

Jan 2025 Feb 2026
10 Months active

Languages Used

CRSTyamlMakefilePythonYAMLoverlayKconfig

Technical Skills

DebuggingEmbedded SystemsFirmware DevelopmentLTE CommunicationNetworkingSystem Integration

hello-nrfcloud/firmware

Oct 2024 Sep 2025
3 Months active

Languages Used

CConfigurationMarkdownYAML

Technical Skills

Configuration ManagementDevice ConfigurationEmbedded SystemsEmbedded Systems ConfigurationFirmware DevelopmentDocumentation

NordicBuilder/sdk-nrf

Oct 2024 Nov 2024
2 Months active

Languages Used

C

Technical Skills

Device ConfigurationEmbedded SystemsMQTT ProtocolNetworkingRTOSConfiguration Management

zephyrproject-rtos/zephyr

Sep 2025 Sep 2025
1 Month active

Languages Used

C

Technical Skills

Embedded SystemsFile Systems