Overview
Stats
76 commits, +3,456/-1,234 lines, 87 files, 12 active days
Languages
C (+1,987), Python (+678), Config (+345), Markdown (+234), Other (+112)
Projects
widget-firmware (62), widget-cli (8), widget-docs (6)
December concluded the quarter with a focus on production readiness, including OTA update support, manufacturing test modes, and comprehensive documentation. The firmware is now ready for initial production runs.
Key Changes & Features
- Over-the-Air Updates
- Implemented a dual-bank firmware architecture enabling safe OTA updates with automatic rollback on failure.
- Added firmware signature verification using Ed25519 for secure update authentication.
- Created a staged update process: download, verify, apply, and confirm.
- Manufacturing Support
- Developed a dedicated manufacturing test mode with automated hardware verification sequences.
- Implemented unique device ID programming and certificate provisioning workflows.
- Added QR code generation for device labeling with serial numbers and calibration data.
- Documentation & Release Prep
- Created comprehensive API documentation for the serial command protocol.
- Wrote integration guides for common host platforms (Linux, Windows, macOS).
- Prepared release notes and changelog automation scripts.
Technologies & Languages
- Embedded C: Bootloader development and cryptographic verification routines.
- Python: Manufacturing tools and documentation generation scripts.
- Ed25519: Asymmetric cryptography for firmware authentication.
Patterns & Architecture
- A/B Partitioning: Dual firmware banks ensure a known-good image is always available for recovery.
- Chain of Trust: Bootloader verifies application signature before execution, preventing unauthorized code.
- Atomic Updates: Configuration changes are written to shadow storage and committed atomically.