
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.

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.
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 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.
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 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.
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 | 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.
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 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.
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 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.
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 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.
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 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.
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 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.
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 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.
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.
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