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oura: decode the rtc_beacon wall-clock anchor (0x85) - #72
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abdulsaheel merged 5 commits intoOct 4, 2026
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Reviewer's GuidePorts the open_oura RTC beacon layout into the Dart Oura protocol decoder, exposing the 0x85 event as a Unix-second wall-clock anchor with its trailer while deliberately leaving date plausibility validation to callers. Tests cover byte order, field offsets, minimum length, and tag validation. Sequence diagram for RTC beacon decodingsequenceDiagram
participant Ring
participant Decoder as decodeRtcBeacon
participant Caller
Ring->>Decoder: OuraEvent(tag=0x85, body)
alt tag is 0x85 and body length >= 10
Decoder->>Decoder: getUint32(0, Endian.little)
Decoder->>Decoder: getUint16(8, Endian.little)
Decoder-->>Caller: OuraRtcBeacon(unixSeconds, trailer)
Caller->>Caller: Pair unixSeconds with envelope decisecond
else foreign tag or body length < 10
Decoder-->>Caller: null
end
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Included review availability: This review used your included allowance. Your plan provides up to 1 included review per hour; 0 remain after this review. 📝 WalkthroughWalkthroughThe Oura event module adds the ChangesRTC beacon decoding
Priority: ⬇️ Low Estimated code review effort: 2 (Simple) | ~10 minutes Change: Feature Suggested reviewers: Merge Risk: ⚪ Minimal · up to The change adds a bounded RTC timestamp decoder, with no material regression or merge-blocking risk established. Architecture SummaryArchitecture risk: 🔵 Low · up to The change affects 2 systems. Changed systems: Architecture concerns Review detailsSystems and components
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Inline comments:
Review comments at @lib/src/oura.dart:
- Around line 134-140: Update decodeRtcBeacon to return the decoded u32
timestamp for valid beacon bodies without applying the date window, and revise
its documentation to state that callers decide whether the value is a plausible
date. Update the unset-RTC test to expect the raw timestamp.
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… as uncaptured, pin the 10-byte guard
# Conflicts: # lib/src/oura.dart
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adds
decodeRtcBeaconfor the0x85rtc beacon the ring sends on its own.u32 LE unix seconds at body offset 0, then reserved bytes and a u16 at offset 8 we don't decode (meaning unknown). bodies under 10 bytes and other tags are refused. same 1700000000-4100000000 date window as
decodeTimeSync, so an unset rtc never becomes an anchor.no real beacon frame in this repo yet, the doc says so. tests cover byte order, the 10-byte boundary, a foreign tag and an unset rtc.
Summary by Sourcery
Decode validated wall-clock anchors emitted by the ring’s RTC beacon events.
New Features:
Enhancements:
Tests:
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