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Reverse-engineer a fitness machine's Bluetooth protocol with AI

The author used AI to reverse engineer the SunnyFit BLE protocol and built a small terminal connector that publishes live workout data to Redis pub/sub for any visualization.

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Source

@davidbl on X · 2026-10-16

Written in our own words. Credit to the original author. Link checked 2026-10-16.

What they did

The author used AI to reverse engineer the SunnyFit BLE protocol and built a small terminal connector that publishes live workout data to Redis pub/sub for any visualization.

Result (as claimed)

Working TUI connector.

Tools they used

Redis

Cost: Pricing depends on the tools you pick; check each official pricing page.

Set it up

  1. Pick a contained repo or task

    Start on a branch or side project where mistakes are cheap.

  2. Install and configure

    Set up Redis. Read what it can run on your machine and limit permissions where possible.

  3. Run it on a real task

    Give it a well-scoped issue and let it work. Review the diff like any pull request.

  4. Add guardrails

    Keep tests and CI in the loop, and never let an agent push to main or touch production secrets unattended.

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Goal: Reverse-engineer a fitness machine's Bluetooth protocol with AI
What the original author did: The author used AI to reverse engineer the SunnyFit BLE protocol and built a small terminal connector that publishes live workout data to Redis pub/sub for any visualization.
Reported result (as claimed by the author): Working TUI connector.
Source: https://x.com/davidbl/status/2111231790199250947
Tools they used: Redis
Category: Dev & ops

Please:
1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like).
2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure.
3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data.
4. Finish with a checklist to run it again next time.

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