~/talk

Zephyr for Open Source Health Devices

on YouTube 43m
Talkat Open Source Summit India 2025 · on Tuesday, 2025-08-05· [embedded-and-hardware]

speaker

name:Ashwin Whitchurch
links:none on file

resources

video:https://youtu.be/F8Lk_D_qlFo
slides:none on file

summary

Built several open hardware products (HealthyPi 5, HealthyPi 6 and the wearable HealthyPi Move) that run the same source tree on different MCUs, replacing Nordic/STM/Arduino SDKs with Zephyr and producing separate binaries per platform. Key solutions: single Zephyr codebase across three microcontroller platforms, power-saving event flow via Zbus event channels and RTIO-based asynchronous sensor reads with DMA and interrupts, XIP and link-time loadable modules to manage flash/RAM tradeoffs, and handling a sampling jump from 128 SPS to 3000 SPS. Firmware and devices are open source and operational.

AI-written summary · about

chapters (7)

  1. 0:00Zephyr and open source health devices
  2. 3:54Why open source health hardware matters
  3. 7:52Transitioning from vendor SDKs to Zephyr
  4. 13:35Moving to mainline Zephyr for portability
  5. 22:34Zephyr’s modular design and portability
  6. 27:41Conclusion and benefits
  7. 28:22Q&A on firmware scaling and certification

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