dafit/moyoung support: pairs and banks raw bytes, no decode - #348
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connects, runs the documented init handshake, acks the two replies that need it, banks every frame. never claims a heart rate, a step count or a sleep stage.
connect, hold the session for a bounded window (no history to drain, no live-workout role), bank frames, disconnect. wired into the same headless sync slot as the ring, plus a manual sync button and forget-device path.
Reviewer's GuideIntroduces experimental DaFit/MOYOUNG-V2 clone-watch support: the app can pair with the watch, run its initialization handshake, selectively acknowledge required protocol replies, and archive raw BLE frames without decoding or deriving health signals, with manual/background sync and forget-device integration. File-Level Changes
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📝 WalkthroughWalkthroughThis change adds archive-only support for DaFit/MOYOUNG watches. It registers the Nordic UART characteristics, performs a paced handshake, archives raw notification frames, supports bounded synchronization, and integrates pairing, manual sync, forgetting, and background sync. ChangesDaFit watch support
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🟡 Moderate · up to DaFit synchronization may silently omit received raw frames or continue interacting with a watch after it has been forgotten, while overlapping sync requests may show a misleading failure. These issues should be fixed before enabling the new watch workflow. Sequence Diagram(s)sequenceDiagram
participant User
participant DeviceDetail
participant DafitLink
participant DaFitWatch
participant LocalDb
User->>DeviceDetail: start DaFit sync
DeviceDetail->>DafitLink: sync()
DafitLink->>LocalDb: read paired row
DafitLink->>DaFitWatch: connect and perform handshake
DaFitWatch-->>DafitLink: notification frames
DafitLink->>LocalDb: archive raw frames
DafitLink-->>DeviceDetail: success or failure
DeviceDetail-->>User: show sync status
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Hey - I've reviewed your changes and they look great!
Sourcery assessment
Needs a human reviewer. If the handshake or archival behavior is wrong, the watch could receive unintended control writes or consume extra battery during the bounded sync window, and raw notification frames will remain persisted after a revert. The persisted archive is bounded and can be deleted or cleared, while reverting stops future connections and writes.
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PR Reviewer Guide 🔍(Review updated until commit 2fa7863)Here are some key observations to aid the review process:
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Actionable comments posted: 6
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Inline comments:
In `@lib/ble/adapters/dafit.dart`:
- Around line 105-107: Update the refused-handshake branch in the generator
around link.write and the archived buffer so pending archived frames are drained
and yielded as SampleBatch results before returning. Preserve the listener
cleanup and existing handshake failure behavior, ensuring frames received before
write refusal still reach BandHost.
- Around line 45-47: Pin openstrap_protocol in pubspec.yaml to PR `#46` head
06cb5f2a2a6c9b9b60e439a423af447837f7267a, regenerate pubspec.lock to that
revision, and do not use pubspec_overrides.yaml. Apply the dependency update for
the affected Dafit call sites in lib/ble/adapters/dafit.dart lines 45-47 and
lib/ble/dafit_link.dart lines 23 and 197.
In `@lib/ble/dafit_link.dart`:
- Line 116: Update the _sync flow around withSecondaryLinkSlot so a queued sync
cannot reconnect a device after forget(deviceId) clears its state and deletes
its row. Serialize forget with slot acquisition or add cancellation-generation
validation after the slot is acquired, before BluetoothDevice.fromId(remoteId),
while preserving normal synchronization for devices that remain valid.
In `@lib/ble/hrs_link.dart`:
- Line 587: Update the forget path around DafitLink.forget so it uses the same
sync lifecycle gate as the DaFit synchronization flow, invalidating and awaiting
or cancelling any pending sync before deleting the row. Ensure syncs waiting in
withSecondaryLinkSlot or before assigning _deviceId cannot reconnect or archive
frames for the forgotten deviceId.
In `@lib/ui2/profile/devices.dart`:
- Line 1531: Update the handler around DafitLink.instance.sync() so a second
Sync now action during an active sync does not show the unreachable-watch
failure message. Disable the Sync now action while its future is pending, or
distinguish the busy result from an actual sync failure and suppress the
reachability error for busy states.
- Line 1536: Update the DaFit sync failure fallback near
devicesCouldNotReachRing to use a DaFit-specific or device-neutral localized
failure key, rather than the ring-specific key when the active locale defines
it. Preserve the existing localization fallback behavior for other device types.
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test/adapter_signals_registry_test.dartis excluded by!test/**test/adapters/dafit_adapter_test.dartis excluded by!test/**test/band_registry_test.dartis excluded by!test/**
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lib/ble/adapters/_registry.dartlib/ble/adapters/dafit.dartlib/ble/dafit_link.dartlib/ble/hrs_link.dartlib/sync/background_sync.dartlib/ui2/pairing/device_picker.dartlib/ui2/profile/devices.dart
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CI resolved pubspec.yaml's committed pin (471034c, pre-dafit), not the gitignored local pubspec_overrides.yaml override — flutter analyze failed with undefined_class/undefined_identifier on every Dafit symbol. Bumps the real pin and kProtocolPin together, no kAlgoVersion bump (dafit has no signals).
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…; drop the ring-specific fallback string A frame archived from an earlier notify before a LATER handshake write is refused was being silently dropped on the early-return path — only the flush.stream loop banked archived frames, and that loop was never entered. Also: the sync-failure snackbar was keying off devicesCouldNotReachRing, which is translated as ring-specific text in every locale; this is a watch, so drop that lookup for the fallback text, matching the 'no localized string yet' call already made for the syncing message right above it.
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the ack write can sit for as long as the session window itself, so gating the flush on it could drop a frame that already landed if teardown happened first. signal right after archiving instead. also adds a DafitLink test — nothing exercised the host itself before, just the adapter.
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Actionable comments posted: 1
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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
minimal, and validate.
Inline comments:
In `@lib/ble/adapters/dafit.dart`:
- Around line 120-122: The DafitAdapter loses frames because yielding suspends
run while notifications continue appending to archived. In the normal flush path
around the archive-yield logic, move the current archive into a local batch and
replace archived before yielding; in the refused-handshake path, cancel or
freeze notification intake before taking the terminal snapshot so later frames
are not stranded. Add a regression test that delivers a second notification
while BandHost processes the first batch, covering both affected sites in
lib/ble/adapters/dafit.dart at lines 120-122 and 137-139.
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lib/ble/adapters/adapter.dartlib/ble/adapters/dafit.dartlib/ble/dafit_link.dartlib/compute/derivation_engine.dartlib/ui2/profile/devices.dartpubspec.yaml
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…fy intake before the refused-handshake snapshot
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1 participant
adds a dafit/moyoung-v2 clone watch (m4/m6/lh716/sunset6/watch7/fit1900-style boards, a pile of storefront names) as a new experimental notify-class band: pairs, runs the init handshake, acks the two replies it needs to, banks every frame. no signal decode, nothing derives from it.
wired into the pairing picker, the headless background sync slot (same piggyback as the ring), a manual sync button, and forget-device.
needs protocol PR #46 merged and this repo's pin bumped before it can merge — using a local pubspec_overrides.yaml against that branch for now.
Summary by Sourcery
Add experimental DaFit/MOYOUNG clone-watch support that performs the required connection handshake and archives all received frames as undecoded raw bytes.
New Features:
Bug Fixes:
Enhancements:
Tests:
Summary by CodeRabbit