veloVigil — open source HRV and crash detection for Karoo (Polar H10)

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Robert Chuvala
  • Edited

Built an open source Karoo extension this week that connects directly to a Polar H10 over BLE for real HRV (RMSSD, SDNN, pNN50 from RR intervals) and crash detection (3-axis accelerometer, filtered g-force).

  What it does:
  - Registers as a Karoo HR sensor so it can own the H10 BLE connection
  - Computes HRV on-device from beat-to-beat RR intervals
  - Crash detection via 50ms sliding window g-force filter (rejects road vibration, catches real impacts)
  - Streams everything to a Cloudflare backend for live dashboards and post-ride AI coaching
  - Works with any BLE HR strap for basic HR, H10 required for HRV and crash detection
  - Free. MIT licensed.

  GitHub: https://github.com/velovigil/velovigil-karoo
  Site: https://velovigil.com

  Built with karoo-ext 1.1.8 and the Polar BLE SDK. Uses the virtual sensor pattern from
  lockevod/Karoo-Power_Extension for the HR bridge.

  Looking for beta testers with a Karoo 2/3 and Polar H10. Feedback welcome.

******still in closed beta, working on a reliability fix.

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    Łukasz Socha

    I’m going to install the extension, will keep you updated m!

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    Robert Chuvala

    Great to hear, I will need to DM you an invite code since it is just coming out of Beta at the moment

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    Łukasz Socha

    lukaszzsch@gmail.com

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    Javiuchi

    Hello. Could you please send me an invitation code? Let me know what you need for that. Thank you.

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    Javiuchi

    It asks me for two pieces of information that I don't know how to obtain: 1) Rider API Key and 2) Rider ID

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    Robert Chuvala

    I have my beta testers and this still is in closed beta, working on a reliability fix, will reach out when it's ready for everyone!

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    Łukasz Kędziora

    Hi Robert, still no chance for invite code?

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    Robert Chuvala
    • Edited

     Hey everyone — beta is opening up! Sign up at https://velovigil.com/beta  to get on the list. Limited to 100 spots. You'll need a Karoo 2/3 and ideally a Polar H10 (any BLE HR strap works for basic HR). I'll send invite codes out as spots open. Thanks for your patience!

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    Łukasz Kędziora
    • Edited

    Robert, on the page from the link, I don't see a place where I could register.

    I have Karoo 3 and Polar H10. I am ready to give you feedback as a beta tester

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    Javiuchi

    Yo pude registrarme hace unos días, pero no he recibido ningún código.

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    Łukasz Kędziora

    I have the same problem, I signed up. No feedback.

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    Robert Chuvala

    Hey Javier and Łukasz — the signup list is working but my invite-send pipeline had a gap. Sending codes manually tonight. Apologies for the silence — this thread just surfaced the bug.
      Thanks for your patience.

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    Javiuchi

    Muchas gracias

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    Robert Chuvala

    Codes went out tonight, check spam, reply if they're missing.

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    Stijn Vermeersch

    Happy to test. Can you send the instructions/codes? Thanks

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