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Mi Body Composition Scale 2: pin the real 7-byte history count reply #608

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Mi Body Composition Scale 2: pin the real 7-byte history count reply #608

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Mi Body Composition Scale 2: pin the real 7-byte history count reply
Riedel-David Oct 21, 2026
33c933b
Merge OpenStrap/edge main into fix/miscale-composition-history
Riedel-David Oct 30, 2026
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4 changes: 2 additions & 2 deletions lib/ble/adapters/_registry.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -979,8 +979,8 @@ bool _looksLikeThermometer(String lowercaseName) =>
/// OS-level service filter does not match, so it is also named there
/// ([BandEntry.scanServiceData]).
///
/// EXPERIMENTAL (ASSUMPTIONS R6). Weight becomes a `weight` observation and
/// impedance a vendor observation. With its developer flag on (default off)
/// Verified on a physical Mi Body Composition Scale 2 (XMTZC05HM). Weight
/// becomes a `weight` observation and impedance a vendor observation. With its developer flag on (default off)
/// the newest weight within 10% of the profile's becomes it
/// (`newestWeighing`); impedance
/// stays a measurement only.
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4 changes: 3 additions & 1 deletion lib/ble/adapters/miscale.dart
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Expand Up @@ -23,7 +23,9 @@
// impedance are shown attributed; with the scale's flag on, a weighing near
// the profile's weight becomes it (`measurement_inputs.dart`).
//
// EXPERIMENTAL (ASSUMPTIONS R6): nobody on this project owns one.
// The Mi Body Composition Scale 2 (XMTZC05HM) is verified on a physical unit:
// pairing, stored history and live weight with impedance. The Mi Smart Scale 2
// is still EXPERIMENTAL (ASSUMPTIONS R6): nobody on this project owns one.

import 'dart:async';
import 'dart:typed_data';
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4 changes: 3 additions & 1 deletion test/adapters/miscale_test.dart
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Expand Up @@ -151,7 +151,9 @@ void main() {
final (rows, link) = await _drive(
kMiScaleComposition,
reply: (u, v) => switch ((u == kMiScaleHistoryChar, v.first)) {
(true, 0x01) => [(kMiScaleHistoryChar, [0x01, 2, 0])],
// The XMTZC05HM's real count reply is 7 bytes (captured on hardware);
// weights and stamps below are made up.
(true, 0x01) => [(kMiScaleHistoryChar, [0x01, 2, 0, 1, 0, 0, 0])],
(true, 0x02) => [
(kMiScaleHistoryChar, [
..._bc(0x22, 480, 14000, DateTime.utc(2026, 10, 2, 7)),
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