Heart Rate Series

Stream: timeseries | Event type: heart_rate_series

Continuous heart rate samples chunked into 15-minute windows using compact columnar arrays.

Example

{
  "event_type": "heart_rate_series",
  "data_version": "1.1",
  "source_id": "ts-hr-a1b2...",
  "provider_ref": "hr-intraday-2026-03-19",
  "device_id": "dev-001",
  "payload_ts": 1742558400000,
  "revision": 1,
  "capture_mode": null,  "window_start": 1742558400000,
  "window_end": 1742559300000,
  "chunk_index": 28,
  "day_complete": false,
  "resolution_s": 5,
  "columns": ["ts", "bpm"],
  "samples": [
    [1742558400000, 72],
    [1742558405000, 73],
    [1742558410000, 71]
  ]
}

Timeseries Common Fields

These fields are shared by all timeseries event types.

Field	Type	Description
`window_start`	`number \| null` (epoch ms)	Start of the 15-minute chunk.
`window_end`	`number \| null` (epoch ms)	End of the 15-minute chunk.
`chunk_index`	`number \| null`	0-based index within the day (0-95 for 15-min chunks).
`day_complete`	`boolean \| null`	Whether Nexus has emitted all available chunks for this day. `null` when unknown.
`resolution_s`	`number \| null`	Sample interval hint in seconds.
`columns`	`string[]`	Ordered column names for each sample array.
`samples`	`array[]`	Compact array of values matching `columns` order.

Heart Rate Columns

Column	Type	Unit	Description
`ts`	`number`	epoch ms	Sample timestamp.
`bpm`	`number`	bpm	Heart rate at this instant.

Day Completeness

`day_complete`	Meaning
`true`	Nexus has received and emitted all available chunks for this day.
`false`	More chunks may follow (day still in progress).
`null`	Nexus cannot determine completeness (e.g., backfill).