Skip to main content Sep 2025 - May 2026 Sep 2025 - May 2026 IMPACT Cap STM32 smart-helmet firmware and data pipeline for environmental and biometric monitoring around self-injurious behavior Hardware ›
- Led embedded application architecture for a 7-task STM32U575 FreeRTOS runtime capturing PDM audio through MDF/GPDMA and generating 5-second telemetry summaries
- Designed portable C impact_core modules for state management, impact detection, time synchronization, Pipeline A/B serialization and retry policy; validated 70 core and 9 DSP tests
- Implemented runtime JWT acquisition and refresh with authenticated ST67 Wi-Fi uploads through a Cloudflare-to-Cloud Run relay; validated 31 consecutive HTTP 201 responses
- Built ThreadX/FileX SD prototype with single-writer queue ownership and drain, flush, close and unmount lifecycle; verified 24 Pipeline A and 24 Pipeline B JSONL records
Feb 2026 - Feb 2026 Feb 2026 - Feb 2026 SonicDivide Privacy-conscious ESP32-S3 environmental sound monitor producing frequency-band metrics without storing raw audio Hardware ›
- Built embedded sound monitor sampling a PDM microphone at 16 kHz and writing 500 ms numeric acoustic summaries and diagnostics to microSD
- Implemented 1,024-point FFT processing with Hann window and 50% overlap across 60-250 Hz, 250-2,000 Hz and 2,000-8,000 Hz bands
- Designed 3-task FreeRTOS capture, DSP and logging pipeline using a 4,096-sample ring buffer and 50-row queue to isolate acquisition from SD latency
- Analyzed 6 archived hardware sessions totaling 1,940 rows and approximately 16.5 minutes with monotonic 512 ms timing and zero reported audio drops or SD errors