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smiling boy

PROFILE

Smiling Boy

Zelong Jiang developed and maintained embedded firmware and platform features for the 78/xiaozhi-sf32 and OpenSiFli/SiFli-SDK repositories, focusing on power management, audio processing, and hardware integration. He engineered solutions for battery management, keyword spotting, and device driver stability, using C and Python to optimize low-level system behavior and user experience. His work included implementing interrupt-driven charging detection, refining UI logic, and integrating Bluetooth and RTOS technologies to support reliable, energy-efficient operation across multiple hardware variants. Jiang’s contributions emphasized maintainable code, robust documentation, and cross-board consistency, resulting in improved onboarding, streamlined release processes, and enhanced platform reliability for end users.

Overall Statistics

Feature vs Bugs

75%Features

Repository Contributions

115Total
Bugs
19
Commits
115
Features
58
Lines of code
49,518
Activity Months10

Work History

January 2026

1 Commits • 1 Features

Jan 1, 2026

January 2026 monthly summary for 78/xiaozhi-sf32: Focused on improving developer onboarding and release readiness through high-value documentation. Delivered comprehensive SFTool GUI and firmware flashing documentation with step-by-step usage and CLI alternatives. This work aligns with the project’s commitment to consistency, faster onboarding, and reduced support overhead. No major bugs fixed this month; the team focused on documentation and knowledge transfer, ensuring clear, repeatable processes for firmware flashing.

December 2025

8 Commits • 4 Features

Dec 1, 2025

December 2025 performance highlights for the 78/xiaozhi-sf32 repository. The month focused on delivering hardware-integrated features, stabilizing power and audio subsystems, and preparing for the 1.4.0 release. Key outcomes include enabling charging and low-power operation on the LiChuang board, optimizing keyword spotting performance, fixing LCD power/driver issues, refining battery management with per-board battery_table and audio improvements, and producing release-ready documentation for 1.4.0 with Bluetooth PAN OTA support and updated flashing commands.

November 2025

4 Commits • 3 Features

Nov 1, 2025

November 2025 focused on delivering core power-management capabilities, clearer build workflows, and SDK alignment for the 78/xiaozhi-sf32 repository. Key outcomes include precise battery percentage calculations, interrupt-based charging detection, documented battery curve specifications, updated build commands with board search paths, and syncing to the latest SDK pointer to ensure compatibility and stability. Collectively, these changes enhance power efficiency, developer productivity, and long-term maintainability across the project.

October 2025

4 Commits • 3 Features

Oct 1, 2025

October 2025 | 78/xiaozhi-sf32: Consolidated feature delivery, bug fixes, and release engineering with impactful outcomes. Key features delivered: UI Text Length Extension and fix for chat interruption; PWM DMA support enabled via SDK node configuration; Release version bumped to V1.3.5. Major bugs fixed: when reconnecting to a shared network, standby jump and audio disruption were resolved. Overall impact: improved user experience in messaging and conversations, enhanced hardware interaction capabilities, and a ready-for-production release. Technologies/skills demonstrated: embedded SDK configuration, PWM-DMA integration, versioning/release management, bug triage and cross-functional collaboration.

September 2025

14 Commits • 6 Features

Sep 1, 2025

September 2025 focused on stability, power efficiency, and user experience across two primary repositories (78/xiaozhi-sf32 and OpenSiFli/SiFli-SDK). Delivered core MCP wakeup/interrupt controls and KWS integration with UI, improved shutdown and power management, and UI enhancements, while hardening hardware compatibility and advancing release readiness. Expanded SiFli-SDK demos and tool integration, and reinforced reliability for low-battery button inputs, RAM-backed backup routines, and board-level power optimizations to support MQTT/MCP integrations and longer deployment cycles.

August 2025

28 Commits • 11 Features

Aug 1, 2025

August 2025 firmware milestones for 78/xiaozhi-sf32 focused on reliability, power efficiency, and user experience. Implemented Sleep management enhancements (8s/12s timers, No Sleep option, countdown cleanup) and a robust wake flow fix, introduced KWS wake-up/interrupt controls with safeguards for unbound devices, and integrated a new KWS library. Executed PSRAM-based memory optimization by relocating thread stacks and large buffers (including KWS buffers) to PSRAM across five boards, enabling better memory footprint and cross-board consistency. Enabled touch input and LED power-off to improve UX and power management. Delivered version bumps for components. Addressed critical reliability bugs across standby transitions, LCD shutdown, Bluetooth disconnect handling, and initialization/shutdown stability, reducing flicker and improving auto-sleep behavior. Documentation updates for homepage README and Docs8.27 to reflect changes. Overall impact: faster wake, longer battery life, more reliable sleep/wake cycles, and a solid foundation for multi-board feature parity and future enhancements.

July 2025

23 Commits • 14 Features

Jul 1, 2025

July 2025 performance summary for 78/xiaozhi-sf32 and OpenSiFli/SiFli-SDK. Delivered a robust mix of power optimization, reliability improvements, UX enhancements, and hardware integrations that strengthen product value and developer experience. Highlights include power-management refinements to reduce standby consumption and prevent deadlocks, UI/UX display improvements for clearer information and longer uptime, and expanded hardware support with RGB LED, Donhua module integration, and EPIC graphics demo, alongside updated documentation for smoother onboarding.

June 2025

20 Commits • 9 Features

Jun 1, 2025

June 2025 performance summary for two primary repositories: OpenSiFli/SiFli-SDK and 78/xiaozhi-sf32. Focused on reliability, developer onboarding, and IoT enablement, delivering concrete features, stability improvements, and improved tooling across hardware variants. Highlights include documentation improvements for LCPU crash analysis, power management enhancements, IO/deep sleep optimizations, IoT/MCP integration, audio processing refinements, and UI/UX upgrades. The work strengthens the platform for faster integration, lower support cost, and better end-user experience.

May 2025

12 Commits • 6 Features

May 1, 2025

May 2025 performance highlights across OpenSiFli/SiFli-SDK and SF32 platforms focused on broader hardware support, energy-efficient UI, and improved build reliability, with an emphasis on delivering business value through hardware compatibility, UX improvements, and maintainable codebase.

April 2025

1 Commits • 1 Features

Apr 1, 2025

April 2025 focused on hardware bring-up and power management enhancements in OpenSiFli/SiFli-SDK with Yellow Mountain support. Delivered IO integration, updated LCD/Touch Panel power and reset configurations to align with the new board, and integrated a GUI application power management module. This work improves hardware validation speed, reduces integration risk for new platforms, and strengthens overall platform readiness. No major bug fixes were documented this month; the emphasis was on feature delivery, code quality, and clear traceability to support QA and customer deployments.

Activity

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Quality Metrics

Correctness85.6%
Maintainability84.8%
Architecture80.4%
Performance78.6%
AI Usage20.8%

Skills & Technologies

Programming Languages

AssemblyCC++ConfigurationHeaderJSONKconfigMarkdownNonePython

Technical Skills

ASRAudio Driver DevelopmentAudio ProcessingBluetoothBluetooth technologyBoard Support Package (BSP) DevelopmentBug FixingBuild System ConfigurationBuild Systems (SCons)CC ProgrammingC programmingC++C++ DevelopmentC/C++

Repositories Contributed To

2 repos

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

78/xiaozhi-sf32

May 2025 Jan 2026
9 Months active

Languages Used

CSConscriptC++JSONMarkdownAssemblyHeaderConfiguration

Technical Skills

BluetoothBuild System ConfigurationDebuggingEmbedded SystemsFirmware DevelopmentAudio Processing

OpenSiFli/SiFli-SDK

Apr 2025 Sep 2025
5 Months active

Languages Used

CKconfigSConscriptMarkdownPython

Technical Skills

Board Support Package (BSP) DevelopmentEmbedded SystemsHardware Abstraction Layer (HAL)Power ManagementDriver DevelopmentEmbedded Systems Development

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