Tinkerforge/esp32-firmware
Nov 2024 – Nov 2025
13 Months active
Languages Used
BinaryCC++HTMLINIJavaScriptTypeScripttsx
Technical Skills
API IntegrationC DevelopmentC ProgrammingC++C++ DevelopmentCode Formatting
Mattias Schäffersmann
PROFILE
Mattias Schäffersmann
Mattias developed and maintained the Tinkerforge/esp32-firmware platform, delivering robust embedded systems for EV charging and energy management. Over 13 months, he engineered features and fixes that improved reliability, diagnostics, and performance, using C++ and Python alongside ESP-IDF and Arduino Core for ESP32. His work included overhauling networking modules, optimizing memory management, and refining web server and API integrations to support secure, scalable deployments. By implementing asynchronous programming patterns and rigorous configuration management, Mattias addressed real-world deployment challenges, such as OTA stability and resource constraints. His contributions demonstrated deep technical understanding and resulted in a maintainable, production-ready firmware baseline.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
344Total
Bugs
125
Commits
344
Features
127
Lines of code
28,528
Activity Months13
Your Network
18 peopleSame Organization
@tinkerforge.com6
Work History
November 2025
2 Commits • 1 Features
Nov 1, 2025November 2025 — Tinkerforge/esp32-firmware: Stabilized Ethernet handling of Jumbo Frames and preemptively increased memory reserves in the event module to accommodate future states. Business value: higher reliability in production networks with jumbo frames and smoother feature expansion with reduced memory risks. Technical gains: targeted RTOS task stack sizing, memory pre-allocation strategy, and careful commit-level changes.
2 Commits • 1 Features
Nov 1, 2025November 2025 — Tinkerforge/esp32-firmware: Stabilized Ethernet handling of Jumbo Frames and preemptively increased memory reserves in the event module to accommodate future states. Business value: higher reliability in production networks with jumbo frames and smoother feature expansion with reduced memory risks. Technical gains: targeted RTOS task stack sizing, memory pre-allocation strategy, and careful commit-level changes.
November 2025
October 2025
12 Commits • 7 Features
Oct 1, 20252025-10 monthly summary for Tinkerforge/esp32-firmware focused on stability, memory safety, and remote-access improvements. Delivered a cohesive set of features improving remote configuration privacy, reporting formatting, and port usage, along with memory benchmarking safety, clearer filename generation, and robust web-server addressing. Finalized Wi-Fi stability refinements and scheduler robustness, and completed essential code cleanup to reduce maintenance burden. The month also included targeted bug fixes to prevent misallocation of current when vehicles draw zero current. Impact highlights: - Security and usability: Remote access config privacy and centralized port usage reduce misconfigurations and exposure. - Observability and data integrity: Improved CSV/reporting formatting and StringWriter-based filename construction improve log/file traceability. - Reliability and performance: Memory type-safety improvements, safer web-server address handling, and scheduleUncancelable enhance task robustness and stability under load. - Networking stability: Wi-Fi STA handling refined to avoid race conditions with AP channel setup, improving connection reliability. - Maintainability: Cleanups removing unused includes reduce build-time dependencies and long-term debt.
October 2025
12 Commits • 7 Features
Oct 1, 20252025-10 monthly summary for Tinkerforge/esp32-firmware focused on stability, memory safety, and remote-access improvements. Delivered a cohesive set of features improving remote configuration privacy, reporting formatting, and port usage, along with memory benchmarking safety, clearer filename generation, and robust web-server addressing. Finalized Wi-Fi stability refinements and scheduler robustness, and completed essential code cleanup to reduce maintenance burden. The month also included targeted bug fixes to prevent misallocation of current when vehicles draw zero current. Impact highlights: - Security and usability: Remote access config privacy and centralized port usage reduce misconfigurations and exposure. - Observability and data integrity: Improved CSV/reporting formatting and StringWriter-based filename construction improve log/file traceability. - Reliability and performance: Memory type-safety improvements, safer web-server address handling, and scheduleUncancelable enhance task robustness and stability under load. - Networking stability: Wi-Fi STA handling refined to avoid race conditions with AP channel setup, improving connection reliability. - Maintainability: Cleanups removing unused includes reduce build-time dependencies and long-term debt.
September 2025
25 Commits • 10 Features
Sep 1, 2025September 2025: ESP32 firmware release for Tinkerforge/esp32-firmware delivering targeted feature upgrades, stability fixes, and tooling enhancements. The release strengthens OTA reliability, memory management, and data handling while advancing privacy-conscious logging and build tooling. Key features and improvements are aligned with safer deployments, enhanced telemetry, and faster iteration cycles.
25 Commits • 10 Features
Sep 1, 2025September 2025: ESP32 firmware release for Tinkerforge/esp32-firmware delivering targeted feature upgrades, stability fixes, and tooling enhancements. The release strengthens OTA reliability, memory management, and data handling while advancing privacy-conscious logging and build tooling. Key features and improvements are aligned with safer deployments, enhanced telemetry, and faster iteration cycles.
September 2025
August 2025
7 Commits • 3 Features
Aug 1, 2025August 2025 monthly summary for Tinkerforge/esp32-firmware: Delivered critical reliability and performance improvements including enhanced diagnostics, streamlined configuration and memory management, and an updated EVSE firmware to beta47. These changes reduce debugging cycles, improve memory footprint in constrained environments, and provide the latest features and stability for field deployments.
August 2025
7 Commits • 3 Features
Aug 1, 2025August 2025 monthly summary for Tinkerforge/esp32-firmware: Delivered critical reliability and performance improvements including enhanced diagnostics, streamlined configuration and memory management, and an updated EVSE firmware to beta47. These changes reduce debugging cycles, improve memory footprint in constrained environments, and provide the latest features and stability for field deployments.
July 2025
32 Commits • 11 Features
Jul 1, 2025July 2025 (Tinkerforge/esp32-firmware) delivered a comprehensive platform update focused on memory efficiency, reliability, and tooling. The module stack benefited from precompiled-library updates, energy-management enhancements, startup/diagnostics improvements, and robust stability fixes across config, networking, and logging. These changes reduce runtime memory footprint, enhance maintainability, and enable safer firmware deployment at scale.
32 Commits • 11 Features
Jul 1, 2025July 2025 (Tinkerforge/esp32-firmware) delivered a comprehensive platform update focused on memory efficiency, reliability, and tooling. The module stack benefited from precompiled-library updates, energy-management enhancements, startup/diagnostics improvements, and robust stability fixes across config, networking, and logging. These changes reduce runtime memory footprint, enhance maintainability, and enable safer firmware deployment at scale.
July 2025
June 2025
51 Commits • 18 Features
Jun 1, 2025June 2025 focused on reliability, performance, and maintainability of the esp32-firmware baseline. Delivered customer-facing web/app reliability improvements, substantial subsystem overhauls for forecasting/pricing, and targeted memory/resource and code-quality enhancements that reduce crash surfaces, improve security posture, and simplify future maintenance across networking, OTA-like updates, and modular components.
June 2025
51 Commits • 18 Features
Jun 1, 2025June 2025 focused on reliability, performance, and maintainability of the esp32-firmware baseline. Delivered customer-facing web/app reliability improvements, substantial subsystem overhauls for forecasting/pricing, and targeted memory/resource and code-quality enhancements that reduce crash surfaces, improve security posture, and simplify future maintenance across networking, OTA-like updates, and modular components.
May 2025
50 Commits • 17 Features
May 1, 2025May 2025 monthly summary for Tinkerforge/esp32-firmware: Security, reliability, and observability improvements across the ESP32 firmware. Delivered features that enhance diagnostics, performance, and network reliability, while fixing critical crash and stability issues. Focused on reducing debugging time and improving safety of module usage and startup behavior, with traceable commits for all major changes.
50 Commits • 17 Features
May 1, 2025May 2025 monthly summary for Tinkerforge/esp32-firmware: Security, reliability, and observability improvements across the ESP32 firmware. Delivered features that enhance diagnostics, performance, and network reliability, while fixing critical crash and stability issues. Focused on reducing debugging time and improving safety of module usage and startup behavior, with traceable commits for all major changes.
May 2025
April 2025
24 Commits • 12 Features
Apr 1, 2025April 2025: Delivered core reliability enhancements and energy-forecast improvements for the ESP32 firmware. Key features include enhanced WiFi diagnostics and connection logging; solar forecast stability improvements (avoid overlapping updates, correct hourly offset, and improved data handling); backend calculation of today’s and tomorrow’s solar totals; and UI/data quality improvements for forecast visualization. Numerous stability, performance, and maintenance fixes across automation, DAP, task scheduling, and web components, contributing to higher reliability, observability, and resource efficiency.
April 2025
24 Commits • 12 Features
Apr 1, 2025April 2025: Delivered core reliability enhancements and energy-forecast improvements for the ESP32 firmware. Key features include enhanced WiFi diagnostics and connection logging; solar forecast stability improvements (avoid overlapping updates, correct hourly offset, and improved data handling); backend calculation of today’s and tomorrow’s solar totals; and UI/data quality improvements for forecast visualization. Numerous stability, performance, and maintenance fixes across automation, DAP, task scheduling, and web components, contributing to higher reliability, observability, and resource efficiency.
March 2025
30 Commits • 12 Features
Mar 1, 2025Performance-focused monthly summary for 2025-03 in the Tinkerforge/esp32-firmware repository. The month delivered platform compatibility and build optimizations, network and power-management reliability improvements, and enhanced diagnostics and energy analytics. Key outcomes include IDF 5.4 compatibility with dynamic logging, removal of unused build variants to streamline artifacts, a lwIP patch to fix WireGuard support enabling secure remote access, added FreeRTOS task dumps for troubleshooting, and meters/energy analysis enhancements for data accuracy and timestamp handling. These changes reduce artifact size, improve system stability and security, and enable more reliable remote operations and billing data.
30 Commits • 12 Features
Mar 1, 2025Performance-focused monthly summary for 2025-03 in the Tinkerforge/esp32-firmware repository. The month delivered platform compatibility and build optimizations, network and power-management reliability improvements, and enhanced diagnostics and energy analytics. Key outcomes include IDF 5.4 compatibility with dynamic logging, removal of unused build variants to streamline artifacts, a lwIP patch to fix WireGuard support enabling secure remote access, added FreeRTOS task dumps for troubleshooting, and meters/energy analysis enhancements for data accuracy and timestamp handling. These changes reduce artifact size, improve system stability and security, and enable more reliable remote operations and billing data.
March 2025
February 2025
21 Commits • 7 Features
Feb 1, 2025February 2025 focused on stabilizing core firmware, simplifying APIs, and tightening cross-repo integration for the Tinkerforge ESP32 firmware. The team delivered runtime reliability improvements, configurable slot management, and localization/compatibility updates that support smoother deployments and fewer field incidents.
February 2025
21 Commits • 7 Features
Feb 1, 2025February 2025 focused on stabilizing core firmware, simplifying APIs, and tightening cross-repo integration for the Tinkerforge ESP32 firmware. The team delivered runtime reliability improvements, configurable slot management, and localization/compatibility updates that support smoother deployments and fewer field incidents.
January 2025
36 Commits • 12 Features
Jan 1, 2025January 2025 performance summary for the Tinkerforge ESP32 firmware portfolio. Delivered targeted features to improve configurability, reliability, and user experience, while fixing critical correctness issues and enhancing security and maintainability across core modules and tooling.
36 Commits • 12 Features
Jan 1, 2025January 2025 performance summary for the Tinkerforge ESP32 firmware portfolio. Delivered targeted features to improve configurability, reliability, and user experience, while fixing critical correctness issues and enhancing security and maintainability across core modules and tooling.
January 2025
December 2024
16 Commits • 3 Features
Dec 1, 2024December 2024 monthly summary for Tinkerforge/esp32-firmware: Delivered a unified Energy Management architecture across WARP1/2 and WEM with a unified expert settings interface, overhaul of phase handling and phase-switching architecture, plus firmware migrations and config ordering improvements. Expanded the meters ecosystem with RS485 support for the SDM630MCT-V2, flash-based MeterInfo persistence, and new meter-only build capabilities, improving reliability and deployment flexibility. UI improvements included translation polish (Polish) and UI text clarity for WiFi and English UI. Fixed critical display bugs and stability issues, including correct single-/three-phase display in the web UI and safer handling when removing the last charger, Warp Energy Manager persistence, and stabilized dependency ordering across builds. These changes drive better energy monitoring/control, reliability in deployments, and faster iteration cycles for future releases.
December 2024
16 Commits • 3 Features
Dec 1, 2024December 2024 monthly summary for Tinkerforge/esp32-firmware: Delivered a unified Energy Management architecture across WARP1/2 and WEM with a unified expert settings interface, overhaul of phase handling and phase-switching architecture, plus firmware migrations and config ordering improvements. Expanded the meters ecosystem with RS485 support for the SDM630MCT-V2, flash-based MeterInfo persistence, and new meter-only build capabilities, improving reliability and deployment flexibility. UI improvements included translation polish (Polish) and UI text clarity for WiFi and English UI. Fixed critical display bugs and stability issues, including correct single-/three-phase display in the web UI and safer handling when removing the last charger, Warp Energy Manager persistence, and stabilized dependency ordering across builds. These changes drive better energy monitoring/control, reliability in deployments, and faster iteration cycles for future releases.
November 2024
38 Commits • 14 Features
Nov 1, 2024November 2024 performance summary for Tinkerforge/esp32-firmware: Delivered a mix of firmware updates, reliability improvements, and data-collection enhancements across EVSE, networking, and charge-management domains. Key outcomes include an EVSE v2 bricklet firmware update, improved internal error logging in the web server, and a series of reliability hardening changes in CM networking and phase switching workflows. Hardware-interface resilience was boosted via reduced I2C timeouts for Warp ESP32 modules, while the meters and charge-manager components gained smarter current handling and validation. These changes improve operator visibility, reduce fault modes, and enable smoother EM phase-switching and charging configurations.
38 Commits • 14 Features
Nov 1, 2024November 2024 performance summary for Tinkerforge/esp32-firmware: Delivered a mix of firmware updates, reliability improvements, and data-collection enhancements across EVSE, networking, and charge-management domains. Key outcomes include an EVSE v2 bricklet firmware update, improved internal error logging in the web server, and a series of reliability hardening changes in CM networking and phase switching workflows. Hardware-interface resilience was boosted via reduced I2C timeouts for Warp ESP32 modules, while the meters and charge-manager components gained smarter current handling and validation. These changes improve operator visibility, reduce fault modes, and enable smoother EM phase-switching and charging configurations.
November 2024
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Quality Metrics
Correctness89.2%
Maintainability89.0%
Architecture85.8%
Performance86.2%
AI Usage20.2%
Skills & Technologies
Programming Languages
BinaryCC++HTMLINIJSONJavaScriptMarkdownPythonShell
Technical Skills
API DesignAPI DevelopmentAPI IntegrationArduino Core for ESP32Asynchronous ProgrammingAuthenticationAutomationBack-end DevelopmentBest Practices DocumentationBuffer ManagementBuild AutomationBuild SystemBuild System OptimizationBuild SystemsC
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