dalathegreat/Battery-Emulator
Apr 2025 – Aug 2025
5 Months active
Languages Used
C++CHTMLJavaScriptYAMLArduinoCMakeCSS
Technical Skills
Build SystemC++C++ DevelopmentCAN BusEmbedded SystemsObject-Oriented Programming
Jaakko Haakana
PROFILE
Jaakko Haakana
Jaakko Haakana developed core features and infrastructure for the Battery-Emulator repository, focusing on extensible battery and inverter emulation for embedded systems. Over five months, he architected modular C++ base classes to unify battery and inverter protocols, enabling rapid integration of new hardware and reducing code duplication. He implemented robust CAN and RS485 communication layers, enhanced build automation with CI/CD pipelines, and improved runtime configurability through a dynamic web UI. Jaakko also introduced comprehensive unit testing and hardware abstraction, using C++ and PlatformIO, which increased reliability and deployment readiness. His work demonstrated depth in embedded firmware, protocol design, and maintainable system architecture.
Overall Statistics
Feature vs Bugs
61%Features
Repository Contributions
187Total
Bugs
35
Commits
187
Features
55
Lines of code
36,839
Activity Months5
Your Network
43 peopleShared Repositories
43
Work History
August 2025
5 Commits • 2 Features
Aug 1, 2025August 2025 performance summary for Battery-Emulator (repository: dalathegreat/Battery-Emulator). Focused on CI/CD automation, reliability, and testability to accelerate releases and improve hardware emulation quality. Delivered an automated release workflow for multi-target hardware, strengthened secret management for secure release publishing, resolved critical runtime logic for the second battery contactor, and introduced a mock ESPClass to enable unit testing without hardware. These efforts reduced manual release steps, improved system reliability, and expanded testing coverage.
5 Commits • 2 Features
Aug 1, 2025August 2025 performance summary for Battery-Emulator (repository: dalathegreat/Battery-Emulator). Focused on CI/CD automation, reliability, and testability to accelerate releases and improve hardware emulation quality. Delivered an automated release workflow for multi-target hardware, strengthened secret management for secure release publishing, resolved critical runtime logic for the second battery contactor, and introduced a mock ESPClass to enable unit testing without hardware. These efforts reduced manual release steps, improved system reliability, and expanded testing coverage.
August 2025
July 2025
58 Commits • 20 Features
Jul 1, 2025July 2025 monthly summary for battery-emulator development focused on delivering runtime-configurable settings, hardware abstraction, and ongoing stability enhancements that enable safer operation, easier maintenance, and faster time to value for deployments.
July 2025
58 Commits • 20 Features
Jul 1, 2025July 2025 monthly summary for battery-emulator development focused on delivering runtime-configurable settings, hardware abstraction, and ongoing stability enhancements that enable safer operation, easier maintenance, and faster time to value for deployments.
June 2025
52 Commits • 13 Features
Jun 1, 2025June 2025 Monthly Summary – Battery-Emulator (dalathegreat/Battery-Emulator) Overview: This month focused on strengthening hardware-software integration, reliability, and deployment readiness for the Battery-Emulator. Key work spanned new HTML renderers for battery status/commands, a robust CAN/RS485 communication framework, enhanced image builds, and stability improvements across HAL, initialization, and battery management logic. The work delivered tangible business value by improving visibility, enabling broader battery support in images, and stabilizing core subsystems for production use. Key features delivered: - Batteries HTML renderers for status and commands (commit 662ae57d2bf755b9ad3494484f53ba385f3701c4). - CAN/RS485 communication framework including CanReceiver and Rs485Receiver with a generic Transmitter interface and Shunt class (commit 2fe64690cd231024b3c33d1cd43a8034111ebea1; 94cc5effa437299f79e5f8435b48213304287795). - Inverter and battery integration enhancements: use the battery object to update values and runtime indication of contactor control from the inverter (commits 1469e8bbb47573a13143a808e9dad2365ccc4aae; 86503ff485334adb675a29d8bacd50039742c844). - Image/build enhancements: larger memory settings for builds and broader common image to include more batteries (commits 30b4b4b54dc71c1dc638a78cfe31b7fd72096bbb; 02917dcbea0a66c6f804e897338aff47c049414f). - HAL stability and initialization improvements: initial HAL changes, null-pointer fix, and completion of HALs (commits 12b402f994a35ff436b39bb2aabd8c53f946ece2; d4aaa2911dcfc6db1f6a349c74987945518e15ed; 49fb79f35ec27bec3b3fba983c81bfc1b2f719ef). - Battery management enhancements: project-wide improvements including compile-time checks moved to cpp, additional getter methods for battery data, and runtime contactor state indication (commits 435f201553c5a832b4325cddbee93ff21274985b; 742650268c3b01342b121f02e7ae243dca79b3ef; 3167c8210c62dd7c4b597af5d278882a0a527fd4; 86503ff485334adb675a29d8bacd50039742c844). - UI reliability improvements: improved battery/inverter CAN bus selection in UI, support for slower CAN speed requests, and charger/battery 2 comm selection (commits e3de4e546c0f10f9d5069af648c660fc0504510d; 37a5d7d3b93fdf4bfc2716232fa07159335df762; 561f5d1958c297a52e3f1e0fb26d446b05067979; 561f5d1958c297a52e3f1e0fb26d446b05067979). Major bugs fixed: - Fixed compile-time dependencies leakage and header issues; eliminated MQTT compile-time dependency on battery type (commits 2b4b86e8ee89245535f79298a1e72042604fde42; 03f957f3e43537b2a00c26be7565bb2a27bf3e64; dbe3de7422c673e3c5d2bdfc965b87c802e598d5). - Reduced double battery usage and moved runtime detection to MQTT to avoid build-time doubling (commits de552e434e96c213823f8cb288c7268886b75a84; 3789d72833e3acdcc7996e19c7bf5a89f274d32f; 8cb4884af71c1e1c7f238a4ef8101a687d6f3785). - Corrected critical initialization issues: added missing setup calls and return statements; fixed Geely battery compilation (d2aff17b3c621c87ee246f5278ddbe5fd0e35b94; a20bd7412241caee2d1e91fceef00de267afffc2; 78d144ffd0c0245c86534ecb661866c0f218d8a8). - MQTT stability improvements: safer array usage and conditional init to avoid crashes when MQTT is not defined (48a0cf3afa75d0fb9beb9a22453fb2973602c792; 6fc8cb81c939ae16e10542b1e754b03df99070e9). - UI stability: fixed battery and inverter selection in UI to prevent misconfigurations (9c036915509055eab6893edc802d81b051c42811). Overall impact and accomplishments: - Significantly improved reliability and deployment readiness for Battery-Emulator in production environments via robust rendering, communication, and image strategies. Expanded battery support in images enabled broader testing and field coverage. Stabilized core subsystems (HAL, initialization, MQTT) reducing risk of outages and regressions. Strengthened software design via Transmitter interface and modular CAN/RS485 layers, enabling easier extension to CAN/RS485 ecosystems. Technologies and skills demonstrated: - C++ / embedded systems programming, HAL development, and initialization sequencing - CAN and RS-485 communications with receiver interfaces and generic transmitters - Image build tooling and memory/configuration tuning for deployment - Runtime configurability and getter-based data access in battery/inverter domain - UI integration for CAN bus and hardware controls - Bug triage and rigorous regression handling with targeted commits
52 Commits • 13 Features
Jun 1, 2025June 2025 Monthly Summary – Battery-Emulator (dalathegreat/Battery-Emulator) Overview: This month focused on strengthening hardware-software integration, reliability, and deployment readiness for the Battery-Emulator. Key work spanned new HTML renderers for battery status/commands, a robust CAN/RS485 communication framework, enhanced image builds, and stability improvements across HAL, initialization, and battery management logic. The work delivered tangible business value by improving visibility, enabling broader battery support in images, and stabilizing core subsystems for production use. Key features delivered: - Batteries HTML renderers for status and commands (commit 662ae57d2bf755b9ad3494484f53ba385f3701c4). - CAN/RS485 communication framework including CanReceiver and Rs485Receiver with a generic Transmitter interface and Shunt class (commit 2fe64690cd231024b3c33d1cd43a8034111ebea1; 94cc5effa437299f79e5f8435b48213304287795). - Inverter and battery integration enhancements: use the battery object to update values and runtime indication of contactor control from the inverter (commits 1469e8bbb47573a13143a808e9dad2365ccc4aae; 86503ff485334adb675a29d8bacd50039742c844). - Image/build enhancements: larger memory settings for builds and broader common image to include more batteries (commits 30b4b4b54dc71c1dc638a78cfe31b7fd72096bbb; 02917dcbea0a66c6f804e897338aff47c049414f). - HAL stability and initialization improvements: initial HAL changes, null-pointer fix, and completion of HALs (commits 12b402f994a35ff436b39bb2aabd8c53f946ece2; d4aaa2911dcfc6db1f6a349c74987945518e15ed; 49fb79f35ec27bec3b3fba983c81bfc1b2f719ef). - Battery management enhancements: project-wide improvements including compile-time checks moved to cpp, additional getter methods for battery data, and runtime contactor state indication (commits 435f201553c5a832b4325cddbee93ff21274985b; 742650268c3b01342b121f02e7ae243dca79b3ef; 3167c8210c62dd7c4b597af5d278882a0a527fd4; 86503ff485334adb675a29d8bacd50039742c844). - UI reliability improvements: improved battery/inverter CAN bus selection in UI, support for slower CAN speed requests, and charger/battery 2 comm selection (commits e3de4e546c0f10f9d5069af648c660fc0504510d; 37a5d7d3b93fdf4bfc2716232fa07159335df762; 561f5d1958c297a52e3f1e0fb26d446b05067979; 561f5d1958c297a52e3f1e0fb26d446b05067979). Major bugs fixed: - Fixed compile-time dependencies leakage and header issues; eliminated MQTT compile-time dependency on battery type (commits 2b4b86e8ee89245535f79298a1e72042604fde42; 03f957f3e43537b2a00c26be7565bb2a27bf3e64; dbe3de7422c673e3c5d2bdfc965b87c802e598d5). - Reduced double battery usage and moved runtime detection to MQTT to avoid build-time doubling (commits de552e434e96c213823f8cb288c7268886b75a84; 3789d72833e3acdcc7996e19c7bf5a89f274d32f; 8cb4884af71c1e1c7f238a4ef8101a687d6f3785). - Corrected critical initialization issues: added missing setup calls and return statements; fixed Geely battery compilation (d2aff17b3c621c87ee246f5278ddbe5fd0e35b94; a20bd7412241caee2d1e91fceef00de267afffc2; 78d144ffd0c0245c86534ecb661866c0f218d8a8). - MQTT stability improvements: safer array usage and conditional init to avoid crashes when MQTT is not defined (48a0cf3afa75d0fb9beb9a22453fb2973602c792; 6fc8cb81c939ae16e10542b1e754b03df99070e9). - UI stability: fixed battery and inverter selection in UI to prevent misconfigurations (9c036915509055eab6893edc802d81b051c42811). Overall impact and accomplishments: - Significantly improved reliability and deployment readiness for Battery-Emulator in production environments via robust rendering, communication, and image strategies. Expanded battery support in images enabled broader testing and field coverage. Stabilized core subsystems (HAL, initialization, MQTT) reducing risk of outages and regressions. Strengthened software design via Transmitter interface and modular CAN/RS485 layers, enabling easier extension to CAN/RS485 ecosystems. Technologies and skills demonstrated: - C++ / embedded systems programming, HAL development, and initialization sequencing - CAN and RS-485 communications with receiver interfaces and generic transmitters - Image build tooling and memory/configuration tuning for deployment - Runtime configurability and getter-based data access in battery/inverter domain - UI integration for CAN bus and hardware controls - Bug triage and rigorous regression handling with targeted commits
June 2025
May 2025
69 Commits • 18 Features
May 1, 2025May 2025 — Performance and maintainability focused: consolidated architecture via shared base classes for batteries and inverters, expanded device coverage, and improved build and observability. Key outcomes include base-class adoption across RS485/Modbus devices, Nissan Leaf CAN battery support (single/double), Jaguar I-Pace base class adoption, charger base class and build readiness, system scaffolding for inverters, and new device support (Afore inverter, BYD CAN inverter protocol, BMW i3 double-battery, Foxess class, Imiev class, and multiple brand battery classes including Pylon, Kia Hyundai 64, Santa Fe phev, Tesla, and a Fake battery). Additional fixes to UI headers, user settings, and CPU temperature publishing to MQTT. These changes reduce duplication, accelerate integration of new hardware, and improve operation visibility and reliability.
May 2025
69 Commits • 18 Features
May 1, 2025May 2025 — Performance and maintainability focused: consolidated architecture via shared base classes for batteries and inverters, expanded device coverage, and improved build and observability. Key outcomes include base-class adoption across RS485/Modbus devices, Nissan Leaf CAN battery support (single/double), Jaguar I-Pace base class adoption, charger base class and build readiness, system scaffolding for inverters, and new device support (Afore inverter, BYD CAN inverter protocol, BMW i3 double-battery, Foxess class, Imiev class, and multiple brand battery classes including Pylon, Kia Hyundai 64, Santa Fe phev, Tesla, and a Fake battery). Additional fixes to UI headers, user settings, and CPU temperature publishing to MQTT. These changes reduce duplication, accelerate integration of new hardware, and improve operation visibility and reliability.
April 2025
3 Commits • 2 Features
Apr 1, 2025April 2025: Delivered a modular architecture for Battery-Emulator enabling extensible support for multiple battery types and standardized inverter communication, with improvements to build reliability. Laid groundwork for rapid integration of new components while maintaining code health and testability.
3 Commits • 2 Features
Apr 1, 2025April 2025: Delivered a modular architecture for Battery-Emulator enabling extensible support for multiple battery types and standardized inverter communication, with improvements to build reliability. Laid groundwork for rapid integration of new components while maintaining code health and testability.
April 2025
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Quality Metrics
Correctness86.4%
Maintainability89.4%
Architecture87.2%
Performance80.0%
AI Usage21.4%
Skills & Technologies
Programming Languages
ArduinoCC++CMakeCSSHTMLINIJavaScriptShellYAML
Technical Skills
Arduino CLIBackend DevelopmentBattery Management SystemsBattery Management Systems (BMS)Build AutomationBuild SystemBuild System ConfigurationBuild System ManagementBuild SystemsCC ProgrammingC++C++ DevelopmentC++ Template MetaprogrammingCAN Bus
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