LedgerHQ/ledger-secure-sdk
Mar 2025 – Sep 2025
4 Months active
Languages Used
C
Technical Skills
C ProgrammingEmbedded DevelopmentUI DevelopmentEmbedded SystemsProtocol DefinitionSDK Development
kevin.meudic
PROFILE
Kevin.meudic
Kevin Meudic developed and enhanced core features for the LedgerHQ/ledger-secure-sdk repository, focusing on embedded systems and device driver reliability. Over four months, he delivered updateable progress bar UI components, streamlined protocol hooks for session management, and integrated USB CDC connectivity for secure data transfer. His work involved C programming, firmware development, and build system improvements, including the removal of legacy audio support and the unification of driver templates for maintainability. By refining USB HID stack handling and coordinating USB/BLE initialization, Kevin improved device communication stability and reduced integration friction, demonstrating a methodical approach to embedded SDK evolution and cross-interface robustness.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
10Total
Bugs
0
Commits
10
Features
5
Lines of code
719
Activity Months4
Your Network
146 people
Work History
September 2025
2 Commits • 1 Features
Sep 1, 20252025-09 Monthly Summary for LedgerHQ/ledger-secure-sdk: Focused on HID robustness and cross-interface stability. Delivered USB HID stack enhancements with improved descriptor handling, report sizing, and HID setup improvements (including USB_REQ_CLEAR_FEATURE). Reordered USB/BLE initialization/deinitialization to ensure BLE initializes before USB and USB teardown occurs after BLE, reducing race conditions and improving reliability. Implemented a missing HID stack signal and reinforced cross-interface coordination among HID, USB, and BLE. These changes reduce USB/BLE friction, improve device reliability, and provide a stronger HID foundation for future work.
2 Commits • 1 Features
Sep 1, 20252025-09 Monthly Summary for LedgerHQ/ledger-secure-sdk: Focused on HID robustness and cross-interface stability. Delivered USB HID stack enhancements with improved descriptor handling, report sizing, and HID setup improvements (including USB_REQ_CLEAR_FEATURE). Reordered USB/BLE initialization/deinitialization to ensure BLE initializes before USB and USB teardown occurs after BLE, reducing race conditions and improving reliability. Implemented a missing HID stack signal and reinforced cross-interface coordination among HID, USB, and BLE. These changes reduce USB/BLE friction, improve device reliability, and provide a stronger HID foundation for future work.
September 2025
August 2025
4 Commits • 1 Features
Aug 1, 2025Month: 2025-08. Focused on delivering USB CDC connectivity support and CDC driver integration for ledger-secure-sdk, with emphasis on reliability, build stability, and consistency with HID patterns. Delivered USB CDC interface for data transfer and APDU command handling, refactored CDC command naming, and aligned CDC driver state management with HID to ensure robust compilation and runtime behavior. These changes extend device compatibility, improve secure communication reliability, and reduce maintenance overhead by unifying templates and naming conventions.
August 2025
4 Commits • 1 Features
Aug 1, 2025Month: 2025-08. Focused on delivering USB CDC connectivity support and CDC driver integration for ledger-secure-sdk, with emphasis on reliability, build stability, and consistency with HID patterns. Delivered USB CDC interface for data transfer and APDU command handling, refactored CDC command naming, and aligned CDC driver state management with HID to ensure robust compilation and runtime behavior. These changes extend device compatibility, improve secure communication reliability, and reduce maintenance overhead by unifying templates and naming conventions.
July 2025
2 Commits • 2 Features
Jul 1, 2025July 2025: LedgerHQ/ledger-secure-sdk focused on simplifying code paths and strengthening protocol readiness. Delivered two feature enhancements in the SEProxy HAL integration and removed obsolete audio runtime support, resulting in clearer build configurations and faster iteration on session handling. Key work centered on removing legacy audio conditional compilation and expanding protocol hooks to support upcoming session workflows.
2 Commits • 2 Features
Jul 1, 2025July 2025: LedgerHQ/ledger-secure-sdk focused on simplifying code paths and strengthening protocol readiness. Delivered two feature enhancements in the SEProxy HAL integration and removed obsolete audio runtime support, resulting in clearer build configurations and faster iteration on session handling. Key work centered on removing legacy audio conditional compilation and expanding protocol hooks to support upcoming session workflows.
July 2025
March 2025
2 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for LedgerHQ/ledger-secure-sdk. Key feature delivered: Progress Bar Layout API Enhancement enabling a container with a progress bar, text, and optional subtext; API surface includes nbgl_layoutAddProgressBar to create the container and nbgl_layoutUpdateProgressBar to modify state and content. This enables more flexible, updateable progress bar UI elements and improves UX consistency. Two commits contributed to this work: 21a00d038cc4b84579642672ed0b01f38266d645 (Rework Progress bar layout) and f33cd37842f63d4a8e662d3348308a4b306fd579 (Implement PR comments). Major bugs fixed: none reported this month. Overall impact and accomplishments: UI flexibility and updateability improved, laying groundwork for broader progress indicator components; contributes to faster UI iteration and better user feedback within the secure SDK. Technologies/skills demonstrated: embedded UI API design (nbgl), API surface evolution, PR-driven development and code quality improvements, collaboration across the team.
March 2025
2 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for LedgerHQ/ledger-secure-sdk. Key feature delivered: Progress Bar Layout API Enhancement enabling a container with a progress bar, text, and optional subtext; API surface includes nbgl_layoutAddProgressBar to create the container and nbgl_layoutUpdateProgressBar to modify state and content. This enables more flexible, updateable progress bar UI elements and improves UX consistency. Two commits contributed to this work: 21a00d038cc4b84579642672ed0b01f38266d645 (Rework Progress bar layout) and f33cd37842f63d4a8e662d3348308a4b306fd579 (Implement PR comments). Major bugs fixed: none reported this month. Overall impact and accomplishments: UI flexibility and updateability improved, laying groundwork for broader progress indicator components; contributes to faster UI iteration and better user feedback within the secure SDK. Technologies/skills demonstrated: embedded UI API design (nbgl), API surface evolution, PR-driven development and code quality improvements, collaboration across the team.
Activity
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Quality Metrics
Correctness88.0%
Maintainability86.0%
Architecture84.0%
Performance80.0%
AI Usage22.0%
Skills & Technologies
Programming Languages
C
Technical Skills
Build SystemsC ProgrammingDevice DriversDriver DevelopmentEmbedded DevelopmentEmbedded SystemsFirmware DevelopmentProtocol DefinitionSDK DevelopmentUI DevelopmentUSB
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