timeIndex is a 15-minute slot. The “per hour” wording in the doc only means you can aggregate 4 consecutive 15-min buckets into 1 hour if you want, but the raw 15-min buckets are available.
✅ Correct API call:
ReadDetailSportDataReq(dayOffset, 0, 95) // dayOffset: 0=today, 1=yesterday, up to 7 days
✅ Important:
The SDK/device may not send an explicit “HH:mm timestamp” for each bucket; instead it provides timeIndex (0..95). You should convert it on the app side:
bucketStartTime = localMidnight + timeIndex * 15 minutes
Example: 0=00:00, 1=00:15, 2=00:30, 3=00:45, 4=01:00 … 95=23:45
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