Tinkerforge/esp32-firmware
Nov 2024 – Oct 2025
12 Months active
Languages Used
C++CSSHTMLJavaScriptPythonSCSSTextTypeScript
Technical Skills
API DesignAPI DevelopmentAPI IntegrationAsynchronous ProgrammingC++Configuration Management
Olaf Lüke
PROFILE
Olaf Lüke
Olaf developed and maintained the Tinkerforge/esp32-firmware platform, delivering robust firmware and web UI features for EV charging and energy management. He engineered protocol-aware enhancements such as ISO 15118 integration, dynamic meter support, and eco charging logic, using C++ and TypeScript to bridge embedded systems with responsive web interfaces. Olaf’s work included optimizing memory usage with PSRAM, implementing per-charger state storage, and refining error handling for asynchronous HTTP endpoints. By focusing on configurability, localization, and maintainability, he improved system reliability and operator visibility. His contributions demonstrated deep expertise in embedded firmware, network protocols, and cross-platform UI development.
Overall Statistics
Feature vs Bugs
64%Features
Repository Contributions
253Total
Bugs
57
Commits
253
Features
102
Lines of code
100,612
Activity Months12
Your Network
18 peopleSame Organization
@tinkerforge.com6
Work History
October 2025
14 Commits • 6 Features
Oct 1, 2025Month: 2025-10 | Repository: Tinkerforge/esp32-firmware Overview: Delivered a set of core firmware and web UI improvements focused on reliability, performance, and developer tooling. Implemented firmware upgrade for EVSE v2, stabilized charging decisions, enhanced web charting with UPlot, improved error handling for HTTP endpoints, and introduced per-charger data storage to strengthen eco charging decisions. These changes collectively reduce user friction, improve debugging capabilities, and support scalable, data-driven charging strategies. Key outcomes: - Firmware and feature set that enable bug fixes and new capabilities with minimal user disruption. - Improved stability in charging decisions and user experience across modes. - Richer, more reliable web UI charts with localization and fullscreen capabilities. - Enhanced debugging support via richer error data for 404 cases and targeted 404 handling for day-ahead prices. - Per-charger persistence of decisions and timestamps to improve accuracy of eco charging plans. Impact: Strengthened reliability and usability of EV charging workflows, reduced support overhead, and delivered data-backed improvements for operational efficiency. Technologies/skills demonstrated: ESP32 firmware development (C/C++), PSRAM-backed per-charger state storage, web UI integration with UPlot, localization, fullscreen interactions, robust async HTTP error reporting, and feature-driven release management.
14 Commits • 6 Features
Oct 1, 2025Month: 2025-10 | Repository: Tinkerforge/esp32-firmware Overview: Delivered a set of core firmware and web UI improvements focused on reliability, performance, and developer tooling. Implemented firmware upgrade for EVSE v2, stabilized charging decisions, enhanced web charting with UPlot, improved error handling for HTTP endpoints, and introduced per-charger data storage to strengthen eco charging decisions. These changes collectively reduce user friction, improve debugging capabilities, and support scalable, data-driven charging strategies. Key outcomes: - Firmware and feature set that enable bug fixes and new capabilities with minimal user disruption. - Improved stability in charging decisions and user experience across modes. - Richer, more reliable web UI charts with localization and fullscreen capabilities. - Enhanced debugging support via richer error data for 404 cases and targeted 404 handling for day-ahead prices. - Per-charger persistence of decisions and timestamps to improve accuracy of eco charging plans. Impact: Strengthened reliability and usability of EV charging workflows, reduced support overhead, and delivered data-backed improvements for operational efficiency. Technologies/skills demonstrated: ESP32 firmware development (C/C++), PSRAM-backed per-charger state storage, web UI integration with UPlot, localization, fullscreen interactions, robust async HTTP error reporting, and feature-driven release management.
October 2025
September 2025
8 Commits • 4 Features
Sep 1, 2025Concise monthly report for 2025-09 for Tinkerforge/esp32-firmware. Delivered firmware and meter-related features across EVSE V2, WEM, and WEM V2, improved localization, and standardized meter handling. Fixed an incorrect reactive power mapping for DSZ15DZMOD. Strengthened code maintainability and testing coverage through refactors and consistent meter value ordering.
September 2025
8 Commits • 4 Features
Sep 1, 2025Concise monthly report for 2025-09 for Tinkerforge/esp32-firmware. Delivered firmware and meter-related features across EVSE V2, WEM, and WEM V2, improved localization, and standardized meter handling. Fixed an incorrect reactive power mapping for DSZ15DZMOD. Strengthened code maintainability and testing coverage through refactors and consistent meter value ordering.
August 2025
8 Commits • 3 Features
Aug 1, 2025Month: 2025-08. This monthly summary highlights key features delivered, major bugs fixed, and overall impact for the Tinkerforge/esp32-firmware, with a focus on business value and technical excellence. Delivered significant EVSE V2 firmware updates, enhanced debugging capabilities, UI localization accuracy, and code quality improvements through compiler warnings cleanup. These efforts improve stability, observability, localization, and maintainability, accelerating issue resolution and deployment confidence.
8 Commits • 3 Features
Aug 1, 2025Month: 2025-08. This monthly summary highlights key features delivered, major bugs fixed, and overall impact for the Tinkerforge/esp32-firmware, with a focus on business value and technical excellence. Delivered significant EVSE V2 firmware updates, enhanced debugging capabilities, UI localization accuracy, and code quality improvements through compiler warnings cleanup. These efforts improve stability, observability, localization, and maintainability, accelerating issue resolution and deployment confidence.
August 2025
July 2025
20 Commits • 4 Features
Jul 1, 2025July 2025 performance summary: Delivered key interoperability and stability enhancements across the ESP32 firmware base with a strong focus on configurability, hardware compatibility, and maintainability. Notable features include ISO15118 core enhancements with API/web configurability and charge-type control, Warp4 product integration, and direct VSPI-based SPI support for QCA700x. Ongoing EVSE v2 firmware maintenance ensured compatibility with newer betas and releases, complemented by extensive repository housekeeping to improve code quality and documentation. These efforts collectively reduce integration risk, accelerate deployments, and deliver tangible business value through improved customer-facing capabilities and long-term maintainability.
July 2025
20 Commits • 4 Features
Jul 1, 2025July 2025 performance summary: Delivered key interoperability and stability enhancements across the ESP32 firmware base with a strong focus on configurability, hardware compatibility, and maintainability. Notable features include ISO15118 core enhancements with API/web configurability and charge-type control, Warp4 product integration, and direct VSPI-based SPI support for QCA700x. Ongoing EVSE v2 firmware maintenance ensured compatibility with newer betas and releases, complemented by extensive repository housekeeping to improve code quality and documentation. These efforts collectively reduce integration risk, accelerate deployments, and deliver tangible business value through improved customer-facing capabilities and long-term maintainability.
June 2025
11 Commits • 4 Features
Jun 1, 2025June 2025 monthly summary for Tinkerforge/esp32-firmware (EVSE platform). Focused on delivering firmware upgrades, enhancing ISO 15118 visibility and reliability, and strengthening protocol robustness. Key features delivered include EVSE v2 firmware upgrades with 2.2.12 beta2, ISO 15118-20 state tracking with UI exposure, ELTAKO branding and environment, and improved connection handling to ensure a single active ISO 15118 session. Major bugs fixed cover SMA protocol exclusion for 0x6073, robust QCA700x burst reads, and SLAC robustness for Ethernet/IETF handling and partial frames. The combined results reduce risk of data corruption, improve device stability, and enable faster onboarding of branding and protocol monitoring for customers. Technologies demonstrated include embedded firmware development for ESP32, ISO 15118 protocol implementations, networking, UI/backend integration, and robust parsing/refactoring.
11 Commits • 4 Features
Jun 1, 2025June 2025 monthly summary for Tinkerforge/esp32-firmware (EVSE platform). Focused on delivering firmware upgrades, enhancing ISO 15118 visibility and reliability, and strengthening protocol robustness. Key features delivered include EVSE v2 firmware upgrades with 2.2.12 beta2, ISO 15118-20 state tracking with UI exposure, ELTAKO branding and environment, and improved connection handling to ensure a single active ISO 15118 session. Major bugs fixed cover SMA protocol exclusion for 0x6073, robust QCA700x burst reads, and SLAC robustness for Ethernet/IETF handling and partial frames. The combined results reduce risk of data corruption, improve device stability, and enable faster onboarding of branding and protocol monitoring for customers. Technologies demonstrated include embedded firmware development for ESP32, ISO 15118 protocol implementations, networking, UI/backend integration, and robust parsing/refactoring.
June 2025
May 2025
1 Commits
May 1, 2025May 2025 monthly summary for Tinkerforge/esp32-firmware. Implemented a targeted bug fix to the SMA Speedwire meter module by introducing a protocol filter to ignore packets with protocol ID 0x6081. This change prevents processing of irrelevant or unexpected messages from SMA EV Chargers, reducing false reads and improving robustness of the meter communication stack. The change was implemented via a focused commit and is ready for testing in production environments.
May 2025
1 Commits
May 1, 2025May 2025 monthly summary for Tinkerforge/esp32-firmware. Implemented a targeted bug fix to the SMA Speedwire meter module by introducing a protocol filter to ignore packets with protocol ID 0x6081. This change prevents processing of irrelevant or unexpected messages from SMA EV Chargers, reducing false reads and improving robustness of the meter communication stack. The change was implemented via a focused commit and is ready for testing in production environments.
April 2025
20 Commits • 5 Features
Apr 1, 2025April 2025 monthly summary for Tinkerforge ESP32 firmware development. Focused on delivering end-to-end ISO15118 charging improvements, strengthening session control, reliability, and user experience, while equipping the team with better debugging and visibility to reduce issue resolution time.
20 Commits • 5 Features
Apr 1, 2025April 2025 monthly summary for Tinkerforge ESP32 firmware development. Focused on delivering end-to-end ISO15118 charging improvements, strengthening session control, reliability, and user experience, while equipping the team with better debugging and visibility to reduce issue resolution time.
April 2025
March 2025
30 Commits • 11 Features
Mar 1, 2025March 2025 (2025-03) monthly summary for Tinkerforge/esp32-firmware focused on delivering cross-ESP revision 3.1 support, advancing ISO15118 work, stabilizing network behavior, and updating EVSE and emulated devices. The month combined feature work with targeted bug fixes to improve reliability, interoperability, and traceability in charging and energy metering flows.
March 2025
30 Commits • 11 Features
Mar 1, 2025March 2025 (2025-03) monthly summary for Tinkerforge/esp32-firmware focused on delivering cross-ESP revision 3.1 support, advancing ISO15118 work, stabilizing network behavior, and updating EVSE and emulated devices. The month combined feature work with targeted bug fixes to improve reliability, interoperability, and traceability in charging and energy metering flows.
February 2025
13 Commits • 3 Features
Feb 1, 2025February 2025 monthly summary for Tinkerforge/esp32-firmware focusing on price-aware energy decisions, robustness, and UI/hardware automation. The team delivered key price-threshold charging capabilities, improved resilience to missing solar forecasts, stabilized the Eco Web UI, refined forecast display behavior, and expanded automation and provisioning capabilities. These changes collectively increase energy-cost savings, reliability, and operator confidence while reducing unnecessary charging and manual interventions.
13 Commits • 3 Features
Feb 1, 2025February 2025 monthly summary for Tinkerforge/esp32-firmware focusing on price-aware energy decisions, robustness, and UI/hardware automation. The team delivered key price-threshold charging capabilities, improved resilience to missing solar forecasts, stabilized the Eco Web UI, refined forecast display behavior, and expanded automation and provisioning capabilities. These changes collectively increase energy-cost savings, reliability, and operator confidence while reducing unnecessary charging and manual interventions.
February 2025
January 2025
29 Commits • 11 Features
Jan 1, 2025January 2025 (Month: 2025-01) focused on delivering business value through enhanced pricing analytics, robust charging control, and UI/chart stability. Key features include 15-minute based processing for 60-minute day-ahead data, direct API-driven charge plan changes on ESP, and a set of UI and chart improvements in the Eco module that improve reliability, usability, and maintainability. Major fixes address data usage safeguards, improved debugging visibility, and stability enhancements for charging decisions. The work strengthens pricing responsiveness, reduces incorrect data usage, and provides clearer diagnostics for operators and developers.
January 2025
29 Commits • 11 Features
Jan 1, 2025January 2025 (Month: 2025-01) focused on delivering business value through enhanced pricing analytics, robust charging control, and UI/chart stability. Key features include 15-minute based processing for 60-minute day-ahead data, direct API-driven charge plan changes on ESP, and a set of UI and chart improvements in the Eco module that improve reliability, usability, and maintainability. Major fixes address data usage safeguards, improved debugging visibility, and stability enhancements for charging decisions. The work strengthens pricing responsiveness, reduces incorrect data usage, and provides clearer diagnostics for operators and developers.
December 2024
42 Commits • 28 Features
Dec 1, 2024December 2024 highlights: Delivered a set of performance-oriented enhancements and configurability improvements across the esp32-firmware repo, while continuing to harden reliability with focused bug fixes. The work emphasizes business value through more efficient pricing calculations, smarter energy management, and memory-conscious optimizations for onboard forecasting and control systems.
42 Commits • 28 Features
Dec 1, 2024December 2024 highlights: Delivered a set of performance-oriented enhancements and configurability improvements across the esp32-firmware repo, while continuing to harden reliability with focused bug fixes. The work emphasizes business value through more efficient pricing calculations, smarter energy management, and memory-conscious optimizations for onboard forecasting and control systems.
December 2024
November 2024
57 Commits • 23 Features
Nov 1, 2024November 2024 Highlights for Tinkerforge/esp32-firmware: Implemented reliable day-ahead pricing workflow with WallClock timing and AsyncHTTPSClient download plus retry, enabling more timely and accurate price signals. Heating control and UI improved with WallClock timing, blocked/extended status, non-blocking PV logic, and gated feature configurations, improving responsiveness and safety. Solar forecast enhancements including download improvements via AsyncHTTPSClient, UI/text cleanups, translation refinements, and clearer plane state differentiation, reducing confusion and network load. Strengthened reliability and safety with JSON buffer overflow/nullptr checks across solar_forecast/day_ahead_prices and a DST handling fix. Energy optimization efforts advanced through eco mode module (service life/status, decision logic) and related eco UI improvements, plus MQTT auto-discovery scheduling improvements and DAP API integration for cheap/exp hours. Additional quality improvements include consistent disabled button behavior, sg ready status visibility, and changelog traceability. These changes collectively improve data reliability, operator visibility, energy optimization potential, and customer business value.
November 2024
57 Commits • 23 Features
Nov 1, 2024November 2024 Highlights for Tinkerforge/esp32-firmware: Implemented reliable day-ahead pricing workflow with WallClock timing and AsyncHTTPSClient download plus retry, enabling more timely and accurate price signals. Heating control and UI improved with WallClock timing, blocked/extended status, non-blocking PV logic, and gated feature configurations, improving responsiveness and safety. Solar forecast enhancements including download improvements via AsyncHTTPSClient, UI/text cleanups, translation refinements, and clearer plane state differentiation, reducing confusion and network load. Strengthened reliability and safety with JSON buffer overflow/nullptr checks across solar_forecast/day_ahead_prices and a DST handling fix. Energy optimization efforts advanced through eco mode module (service life/status, decision logic) and related eco UI improvements, plus MQTT auto-discovery scheduling improvements and DAP API integration for cheap/exp hours. Additional quality improvements include consistent disabled button behavior, sg ready status visibility, and changelog traceability. These changes collectively improve data reliability, operator visibility, energy optimization potential, and customer business value.
Activity
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Quality Metrics
Correctness90.4%
Maintainability90.2%
Architecture87.4%
Performance86.8%
AI Usage20.0%
Skills & Technologies
Programming Languages
BashBinaryCC++CSSHTMLINIJavaScriptPythonSCSS
Technical Skills
API DesignAPI DevelopmentAPI IntegrationAsynchronous ProgrammingAutomationBrandingBuild SystemsC ProgrammingC++C++ DevelopmentC/C++Code RefactoringCommunication ProtocolsCompiler WarningsComponent Reusability
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