From ffd846069b52e876be541b80b6e5115e462bd1ca Mon Sep 17 00:00:00 2001
From: David Riedel <48388362+Riedel-David@users.noreply.github.com>
Date: Thu, 22 Oct 2026 00:20:36 +0300
Subject: [PATCH] Mi Body Composition Scale 2: pin the real 7-byte history
 count reply

The XMTZC05HM answers the history request with 7 bytes, not 3. The
composition history test now sends that reply, so it fails on a protocol
that cannot read it. Mark the composition scale as verified on hardware;
the Mi Smart Scale 2 stays experimental.

Needs the openstrap_protocol pin bumped to a commit containing
OpenStrap/protocol#81.
---
 lib/ble/adapters/_registry.dart | 4 ++--
 lib/ble/adapters/miscale.dart   | 4 +++-
 test/adapters/miscale_test.dart | 4 +++-
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/lib/ble/adapters/_registry.dart b/lib/ble/adapters/_registry.dart
index beeef00f0..b7f7c3e29 100644
--- a/lib/ble/adapters/_registry.dart
+++ b/lib/ble/adapters/_registry.dart
@@ -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.
diff --git a/lib/ble/adapters/miscale.dart b/lib/ble/adapters/miscale.dart
index 74e19e1fa..201475457 100644
--- a/lib/ble/adapters/miscale.dart
+++ b/lib/ble/adapters/miscale.dart
@@ -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';
diff --git a/test/adapters/miscale_test.dart b/test/adapters/miscale_test.dart
index 9ef504b39..1df7cab6a 100644
--- a/test/adapters/miscale_test.dart
+++ b/test/adapters/miscale_test.dart
@@ -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)),