Own Xiaomi scale, one agent prompt: BrOrlandi’s local BLE dashboard

Short version

He wanted the scale’s readings on his own server — training context from a watch, meal ideas — without staying inside the vendor app. The follow-up demo says one prompt produced an app he preferred to the official one. The repo is a self-hosted listener: while someone stands on his scale, a nearby computer hears Bluetooth advertisements and the browser shows weight and body composition. No Xiaomi account and no vendor cloud in that path.

Attribution (read this)

Credit: Bruno Orlandi, @BrOrlandi. The demo post, the earlier “I want to reverse engineer it” note, and the GitHub repo are his.

What was demonstrated

1. Own device. Mi Body Composition Scale 2 (model called out by the author as XMTZC05HM in the repo).
2. Agent session. He describes one coding-agent prompt and a few minutes for the first demo.
3. What the software does. A local dashboard matches a weigh-in to a profile, stores history, and can optionally ask a model he configures for a weekly summary of his numbers. The README credits body-composition formulas to public projects (openScale and related), not to a private exploit.
4. How he described the link. In-thread he said the connection is Bluetooth Low Energy and that the scale’s broadcast is straightforward to receive. The README states the scale does not pair; it advertises while someone is standing on it.
5. Official artifacts. Repo BrOrlandi/miscale-dashboard (MIT, Python; 46 stars on 2026-10-13). Promo video: YouTube.

Public metrics (snapshot 2026-10-13)

How this relates to REA

REA is the local MCP/CLI that lets a coding agent inspect software you are allowed to analyze and return Evidence plus unknowns. BrOrlandi’s posts are the same lawful shape — own device, agent, a rebuild you can read. If you want that Evidence loop on a target you own, install REA and keep the human in charge of approval.

Install. Paste into your agent, or run it yourself: npx rea-agents@latest setup. Then restart the client. Walkthrough: /docs/install/ · Codex demo: /docs/install-demo/.

Nearby case. @thinkszyg’s toilet BLE remote is another own-device remote on the same wall.

What to copy (authorized hardware only)

• [ ] The scale is yours, or you have written permission
• [ ] You scope the listener to your unit (the repo’s own docs warn that another scale in range can appear)
• [ ] You do not publish secrets, account tokens, or a neighbor’s measurements
• [ ] If you add REA, you ask for Evidence and unknowns — not a vibe-only story
• [ ] Medical claims stay out; bioimpedance is an estimate