Measurement.fromData constructor
Create a measurement from data based on the sensorStartTime provided
by the sensor. If sensorStartTime is not specified, the phones current
time stamp as microseconds since epoch is used.
Implementation
factory Measurement.fromData(Data data, [int? sensorStartTime]) =>
Measurement(
sensorStartTime:
sensorStartTime ?? DateTime.now().microsecondsSinceEpoch,
data: data);