Tinkerforge/esp32-firmware
Oct 2024 – Feb 2026
17 Months active
Languages Used
C++INIJavaScriptTypeScripttsxHTMLCSSPython
Technical Skills
API integrationC++ developmentC++ programmingembedded systemsnetwork programmingAPI Design
Frederic Henrichs
PROFILE
Frederic Henrichs
Frederic developed and maintained the Tinkerforge/esp32-firmware, focusing on robust remote access, charge tracking, and data export features for embedded systems. He engineered multi-user remote access with WireGuard integration, asynchronous HTTP communication, and secure authentication, using C++ and TypeScript to ensure reliability and maintainability. Frederic refactored core modules for better state management, implemented CSV and PDF export with internationalization, and enhanced UI/UX with React and Preact. His work addressed stability, memory management, and network resilience, delivering features like chunked file transfers and locale-aware data formatting. The depth of his contributions improved system reliability, user experience, and long-term maintainability.
Overall Statistics
Feature vs Bugs
60%Features
Repository Contributions
273Total
Bugs
59
Commits
273
Features
89
Lines of code
13,306
Activity Months17
Your Network
19 peopleSame Organization
@tinkerforge.com7
Shared Repositories
12
Julius DillMember
Erik FlecksteinMember
Test RPiMember
Julius DillMember
Julius DillMember
Julius DillMember
Julius DillMember
Markus LippertMember
Matthias BolteMember
Work History
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026: Delivered the CSV Charge Log Display Name Rendering feature for Tinkerforge/esp32-firmware. Refactored CSV charge log generation to use getUserDisplayName for consistent and user-friendly display names in CSV output. Fixed a bug where display names were not derived via getUserDisplayName, ensuring centralized logic and accurate labeling across logs. This work improves data readability for customers and support teams, reduces confusion in logs, and sets the stage for simpler future enhancements. Technologies demonstrated include C/C++ firmware development for ESP32, code refactoring, and Git-based traceability with a focus on maintainability and user-centric data presentation.
1 Commits • 1 Features
Feb 1, 2026February 2026: Delivered the CSV Charge Log Display Name Rendering feature for Tinkerforge/esp32-firmware. Refactored CSV charge log generation to use getUserDisplayName for consistent and user-friendly display names in CSV output. Fixed a bug where display names were not derived via getUserDisplayName, ensuring centralized logic and accurate labeling across logs. This work improves data readability for customers and support teams, reduces confusion in logs, and sets the stage for simpler future enhancements. Technologies demonstrated include C/C++ firmware development for ESP32, code refactoring, and Git-based traceability with a focus on maintainability and user-centric data presentation.
February 2026
January 2026
6 Commits • 2 Features
Jan 1, 2026January 2026 — esp32-firmware Remote Access module: Delivered stability and reliability improvements, eliminated startup delay, and introduced resilience features to reduce downtime and improve user experience. Focused on the Tinkerforge/esp32-firmware repo with targeted bug fixes and feature work to enhance remote connectivity and readiness.
January 2026
6 Commits • 2 Features
Jan 1, 2026January 2026 — esp32-firmware Remote Access module: Delivered stability and reliability improvements, eliminated startup delay, and introduced resilience features to reduce downtime and improve user experience. Focused on the Tinkerforge/esp32-firmware repo with targeted bug fixes and feature work to enhance remote connectivity and readiness.
December 2025
4 Commits • 2 Features
Dec 1, 2025Monthly summary for 2025-12 focusing on business value and technical achievements in Tinkerforge/esp32-firmware. Key features delivered include remote access reliability improvements with a full reconnect mechanism and hostname resolution on reconnection attempts, plus MTU tuning to safer values for network transmission. Major bug fixes address charge-tracker stability by reverting a problematic dependency addition and standardizing the multipart form-data boundary for uploads to ensure consistent data transmission. Overall impact: increased remote connectivity reliability, more stable charge-tracking data flow, and reduced risk from dependency changes, enabling more reliable deployments and smoother user experiences. Technologies/skills demonstrated include network resilience, MTU optimization, dependency management, and data-transfer protocol consistency.
4 Commits • 2 Features
Dec 1, 2025Monthly summary for 2025-12 focusing on business value and technical achievements in Tinkerforge/esp32-firmware. Key features delivered include remote access reliability improvements with a full reconnect mechanism and hostname resolution on reconnection attempts, plus MTU tuning to safer values for network transmission. Major bug fixes address charge-tracker stability by reverting a problematic dependency addition and standardizing the multipart form-data boundary for uploads to ensure consistent data transmission. Overall impact: increased remote connectivity reliability, more stable charge-tracking data flow, and reduced risk from dependency changes, enabling more reliable deployments and smoother user experiences. Technologies/skills demonstrated include network resilience, MTU optimization, dependency management, and data-transfer protocol consistency.
December 2025
November 2025
1 Commits
Nov 1, 2025November 2025: Concentrated on data export accuracy and localization support in ESP32 firmware. Resolved a critical CSV export issue affecting German locale by making numeric formatting language-aware, ensuring German decimal separators are correctly represented in CSV exports. Implemented a Language parameter for formatEnergy and formatPrice to support locale-specific formatting, improving data integrity for multi-language users and reducing misinterpretation in German Excel.
November 2025
1 Commits
Nov 1, 2025November 2025: Concentrated on data export accuracy and localization support in ESP32 firmware. Resolved a critical CSV export issue affecting German locale by making numeric formatting language-aware, ensuring German decimal separators are correctly represented in CSV exports. Implemented a Language parameter for formatEnergy and formatPrice to support locale-specific formatting, improving data integrity for multi-language users and reducing misinterpretation in German Excel.
October 2025
65 Commits • 28 Features
Oct 1, 2025October 2025 monthly summary for the esp32-firmware project focused on Charge Tracker improvements, reliability, and performance. Delivered a broad set of UX enhancements, backend sending flows, and UI/API refinements that drive business value through faster, more reliable charge-log handling and better user experience. Key technical strides include migration toward modern UI patterns (preact/hooks), richer translations, and robust async/task management, plus backend improvements for sending configurations and logs. Highlights by area: - User experience and UI: Charge Tracker UI/UX enhancements (language dropdown, editable titles, and repositioned send email component) with smarter display-name handling when display/device match; improved spinner spacing and translation updates. - Data sending and config flows: Added per-user last-sent tracking for charge logs; added function to send specific config and UI to send charge logs; included display name in charge log sends; UI supports multipart/form-data uploads for reliability. - Performance and reliability: Start PDF generation in the HTTP thread; added charge log generation state; refactored charge log sending for reliability; removed upload retries and addressed potential deadlocks; increased async HTTP timeout and ensured code runs in the main asyncio task. - API/UI modernization: Web/Charge Tracker API interactions updated; migrated to preact/hooks; stopped using useEffect; translations handling modernized; remote_access and translations enhancements for better localization and remote operations. - Security, stability, and maintenance: Removed CSV generation leftovers and unnecessary code; fixed translation and UI text issues; added NTP warning in remote access flow; hardened various edge cases (month-end log naming ISO format, etc.). Overall impact: These changes deliver measurable business value through more reliable charge-log workflows, clearer user notifications, faster log transmission, and a more maintainable codebase that supports scalable, localized UI changes. Technologies/skills demonstrated: UI/UX design, API integration, multipart/form-data handling, asynchronous task management, preact/hooks migration, translation/localization, and robust bug-fix discipline.
65 Commits • 28 Features
Oct 1, 2025October 2025 monthly summary for the esp32-firmware project focused on Charge Tracker improvements, reliability, and performance. Delivered a broad set of UX enhancements, backend sending flows, and UI/API refinements that drive business value through faster, more reliable charge-log handling and better user experience. Key technical strides include migration toward modern UI patterns (preact/hooks), richer translations, and robust async/task management, plus backend improvements for sending configurations and logs. Highlights by area: - User experience and UI: Charge Tracker UI/UX enhancements (language dropdown, editable titles, and repositioned send email component) with smarter display-name handling when display/device match; improved spinner spacing and translation updates. - Data sending and config flows: Added per-user last-sent tracking for charge logs; added function to send specific config and UI to send charge logs; included display name in charge log sends; UI supports multipart/form-data uploads for reliability. - Performance and reliability: Start PDF generation in the HTTP thread; added charge log generation state; refactored charge log sending for reliability; removed upload retries and addressed potential deadlocks; increased async HTTP timeout and ensured code runs in the main asyncio task. - API/UI modernization: Web/Charge Tracker API interactions updated; migrated to preact/hooks; stopped using useEffect; translations handling modernized; remote_access and translations enhancements for better localization and remote operations. - Security, stability, and maintenance: Removed CSV generation leftovers and unnecessary code; fixed translation and UI text issues; added NTP warning in remote access flow; hardened various edge cases (month-end log naming ISO format, etc.). Overall impact: These changes deliver measurable business value through more reliable charge-log workflows, clearer user notifications, faster log transmission, and a more maintainable codebase that supports scalable, localized UI changes. Technologies/skills demonstrated: UI/UX design, API integration, multipart/form-data handling, asynchronous task management, preact/hooks migration, translation/localization, and robust bug-fix discipline.
October 2025
September 2025
39 Commits • 20 Features
Sep 1, 2025September 2025 (2025-09) — A robust month focused on reliability, security, and developer velocity across the ESP32 firmware. Major refactors and feature work improved remote access reliability, hardened input handling, and consistent status feedback, while several UX and data workflow enhancements accelerated onboarding and troubleshooting.
September 2025
39 Commits • 20 Features
Sep 1, 2025September 2025 (2025-09) — A robust month focused on reliability, security, and developer velocity across the ESP32 firmware. Major refactors and feature work improved remote access reliability, hardened input handling, and consistent status feedback, while several UX and data workflow enhancements accelerated onboarding and troubleshooting.
August 2025
6 Commits • 3 Features
Aug 1, 2025In August 2025, the ESP32 firmware delivered meaningful business value through reliability improvements, code maintainability enhancements, and user-focused UX updates. Key work spanned remote access stabilization, large-file transfer reliability, and centralized device registration state management, with targeted UX and internal refactors to improve cross-module consistency and future maintainability.
6 Commits • 3 Features
Aug 1, 2025In August 2025, the ESP32 firmware delivered meaningful business value through reliability improvements, code maintainability enhancements, and user-focused UX updates. Key work spanned remote access stabilization, large-file transfer reliability, and centralized device registration state management, with targeted UX and internal refactors to improve cross-module consistency and future maintainability.
August 2025
July 2025
18 Commits • 3 Features
Jul 1, 2025In July 2025, delivered major enhancements to the esp32-firmware charging/logging suite, expanding reporting capabilities, reliability, and localization. Work focused on scalable, multi-user distribution of charge logs, enhanced export formats, and robust error handling to improve uptime and user satisfaction. Changes align with business goals of improved transparency, regulatory readiness, and global usability.
July 2025
18 Commits • 3 Features
Jul 1, 2025In July 2025, delivered major enhancements to the esp32-firmware charging/logging suite, expanding reporting capabilities, reliability, and localization. Work focused on scalable, multi-user distribution of charge logs, enhanced export formats, and robust error handling to improve uptime and user satisfaction. Changes align with business goals of improved transparency, regulatory readiness, and global usability.
June 2025
8 Commits • 3 Features
Jun 1, 2025June 2025 monthly summary for the esp32-firmware workstream. Delivered stability and UX improvements across remote access and email workflows, along with performance-oriented enhancements for HTTP communication in the async HTTPS client. Implemented critical fixes and new configuration/UI capabilities that enable larger payload handling and clearer user feedback, while strengthening authentication reliability and safeguards against unintended chargelog emissions.
8 Commits • 3 Features
Jun 1, 2025June 2025 monthly summary for the esp32-firmware workstream. Delivered stability and UX improvements across remote access and email workflows, along with performance-oriented enhancements for HTTP communication in the async HTTPS client. Implemented critical fixes and new configuration/UI capabilities that enable larger payload handling and clearer user feedback, while strengthening authentication reliability and safeguards against unintended chargelog emissions.
June 2025
May 2025
19 Commits • 3 Features
May 1, 2025May 2025 monthly summary for Tinkerforge/esp32-firmware: delivered key network diagnostics improvements, robust remote access, and a new bit-count utility. The changes emphasize reliability, visibility, and performance across the ESP32 firmware.
May 2025
19 Commits • 3 Features
May 1, 2025May 2025 monthly summary for Tinkerforge/esp32-firmware: delivered key network diagnostics improvements, robust remote access, and a new bit-count utility. The changes emphasize reliability, visibility, and performance across the ESP32 firmware.
April 2025
24 Commits • 8 Features
Apr 1, 2025April 2025 performance summary for Tinkerforge/esp32-firmware. Focused on delivering robust features, reducing risk via targeted bug fixes, and improving developer experience through standardized UI components and configurable documentation links. The month yielded notable improvements in data integrity, UX consistency across web modules, build stability, and enhanced configurability for long-term maintenance.
24 Commits • 8 Features
Apr 1, 2025April 2025 performance summary for Tinkerforge/esp32-firmware. Focused on delivering robust features, reducing risk via targeted bug fixes, and improving developer experience through standardized UI components and configurable documentation links. The month yielded notable improvements in data integrity, UX consistency across web modules, build stability, and enhanced configurability for long-term maintenance.
April 2025
March 2025
15 Commits • 3 Features
Mar 1, 2025March 2025 highlights across Tinkerforge/esp32-firmware focused on stability, observability, and developer experience. Delivered core remote-access stability fixes, enhanced version reporting for deployments, UI/UX/status improvements, and targeted internal refactors with documentation updates. These changes reduce outages, improve deployment traceability, and facilitate maintainable, scalable remote access features.
March 2025
15 Commits • 3 Features
Mar 1, 2025March 2025 highlights across Tinkerforge/esp32-firmware focused on stability, observability, and developer experience. Delivered core remote-access stability fixes, enhanced version reporting for deployments, UI/UX/status improvements, and targeted internal refactors with documentation updates. These changes reduce outages, improve deployment traceability, and facilitate maintainable, scalable remote access features.
February 2025
5 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary for Tinkerforge/esp32-firmware: Delivered key enhancements to remote access, improved UI controls, and strengthened web UI stability. Highlights include: Remote Access Module Improvements with targeted HTTP client error handling (code 10) and a clarifying comment about configuration state containing sensitive values; Table Edit Button UX Enhancement to hide edit button when onEditShow is undefined; Web UI Stability and Accuracy Fixes to convert LED durations from milliseconds to seconds and to guard the color picker against invalid color data with a default RGB. These changes reduce user confusion, prevent invalid edits, and improve reliability across devices, ultimately supporting smoother deployments and better user experience. Commits include fc805c2cec4546ae66a9325f81f2b4c1f5dc57f7, 7c5c36894179d828a09d74b4985cc1eba2587d9d, 5fa232fa71af8a3f5c482de1d7afe59afcea949b, 10da8004314e61de9100e99e9463c9ef3f94ca5f, 8d5fe2e7823c066ec463b8911a032a08449090bc.
5 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary for Tinkerforge/esp32-firmware: Delivered key enhancements to remote access, improved UI controls, and strengthened web UI stability. Highlights include: Remote Access Module Improvements with targeted HTTP client error handling (code 10) and a clarifying comment about configuration state containing sensitive values; Table Edit Button UX Enhancement to hide edit button when onEditShow is undefined; Web UI Stability and Accuracy Fixes to convert LED durations from milliseconds to seconds and to guard the color picker against invalid color data with a default RGB. These changes reduce user confusion, prevent invalid edits, and improve reliability across devices, ultimately supporting smoother deployments and better user experience. Commits include fc805c2cec4546ae66a9325f81f2b4c1f5dc57f7, 7c5c36894179d828a09d74b4985cc1eba2587d9d, 5fa232fa71af8a3f5c482de1d7afe59afcea949b, 10da8004314e61de9100e99e9463c9ef3f94ca5f, 8d5fe2e7823c066ec463b8911a032a08449090bc.
February 2025
January 2025
18 Commits • 2 Features
Jan 1, 2025January 2025: Delivered substantial remote access enhancements to the ESP32 firmware, adding UUID-based user identification, token-based authentication, and multiple registration methods; introduced a Base58-to-JSON decoder utility; and performed targeted UI/utility cleanup. These changes enhance security, reliability, and maintainability across the remote access workflow and data processing.
January 2025
18 Commits • 2 Features
Jan 1, 2025January 2025: Delivered substantial remote access enhancements to the ESP32 firmware, adding UUID-based user identification, token-based authentication, and multiple registration methods; introduced a Base58-to-JSON decoder utility; and performed targeted UI/utility cleanup. These changes enhance security, reliability, and maintainability across the remote access workflow and data processing.
December 2024
16 Commits • 4 Features
Dec 1, 2024Monthly summary for 2024-12 focused on the esp32-firmware remote access module (Tinkerforge/esp32-firmware). Delivered a set of coordinated migrations and onboarding improvements, robust validation, and targeted maintenance to improve reliability, security, and developer productivity. Key achievements highlight the consolidation of remote access migrations, enhanced onboarding and data handling, prevention of duplicate user registrations, stability and error-handling improvements, and translation/API maintenance.
16 Commits • 4 Features
Dec 1, 2024Monthly summary for 2024-12 focused on the esp32-firmware remote access module (Tinkerforge/esp32-firmware). Delivered a set of coordinated migrations and onboarding improvements, robust validation, and targeted maintenance to improve reliability, security, and developer productivity. Key achievements highlight the consolidation of remote access migrations, enhanced onboarding and data handling, prevention of duplicate user registrations, stability and error-handling improvements, and translation/API maintenance.
December 2024
November 2024
25 Commits • 4 Features
Nov 1, 2024Delivered scalable Remote Access improvements on the Tinkerforge esp32-firmware in Nov 2024, including multi-user support with dynamic WireGuard slot management and per-user encryption, cross-device user synchronization, UX improvements, and reliability fixes that improve security, maintainability, and business value.
November 2024
25 Commits • 4 Features
Nov 1, 2024Delivered scalable Remote Access improvements on the Tinkerforge esp32-firmware in Nov 2024, including multi-user support with dynamic WireGuard slot management and per-user encryption, cross-device user synchronization, UX improvements, and reliability fixes that improve security, maintainability, and business value.
October 2024
3 Commits • 1 Features
Oct 1, 2024October 2024: Completed the Remote Access API modernization and HTTP fetch unification for the esp32-firmware, aligning remote access with API changes and modern REST-based configuration. Core work included handling registration API changes (renamed member string), accommodating larger JSON responses, and integrating a new management REST API for configuration and user identification. Refactored HTTP requests to use a unified fetch method, reducing complexity and improving maintainability. This set of changes strengthens the remote access surface and prepares the codebase for future API evolutions.
3 Commits • 1 Features
Oct 1, 2024October 2024: Completed the Remote Access API modernization and HTTP fetch unification for the esp32-firmware, aligning remote access with API changes and modern REST-based configuration. Core work included handling registration API changes (renamed member string), accommodating larger JSON responses, and integrating a new management REST API for configuration and user identification. Refactored HTTP requests to use a unified fetch method, reducing complexity and improving maintainability. This set of changes strengthens the remote access surface and prepares the codebase for future API evolutions.
October 2024
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Quality Metrics
Correctness89.8%
Maintainability89.0%
Architecture86.4%
Performance86.4%
AI Usage20.2%
Skills & Technologies
Programming Languages
CC++CSSHTMLINIJavaScriptPythonSCSSTypeScripttsx
Technical Skills
API DesignAPI DevelopmentAPI IntegrationAPI integrationAsynchronous ProgrammingAuthenticationBackend DevelopmentBit ManipulationBootstrapBuild SystemsC++C++ developmentC++ programmingCSSCSV Formatting
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