protected override void OnCharacteristicValueChanged(GattCharacteristic sender, GattValueChangedEventArgs eventArgs)
{
if (sender.Uuid == MagnetometerCharacteristicUuid)
{
if (_magnetometerValueChanged != null)
{
uint dataLength = eventArgs.CharacteristicValue.Length;
using (DataReader reader = DataReader.FromBuffer(eventArgs.CharacteristicValue))
{
if (dataLength == 6)
{
var data = new byte[dataLength];
reader.ReadBytes(data);
MagnetometerMeasurement measurement = new MagnetometerMeasurement();
int x = (int)data[0] + ((sbyte)data[1] << 8);
int y = (int)data[2] + ((sbyte)data[3] << 8);
int z = (int)data[4] + ((sbyte)data[5] << 8);
measurement.X = (double)x * (2000.0 / 65536.0);
measurement.Y = (double)y * (2000.0 / 65536.0);
measurement.Z = (double)z * (2000.0 / 65536.0);
OnMagnetometerMeasurementValueChanged(new MagnetometerMeasurementEventArgs(measurement, eventArgs.Timestamp));
}
}
}
}
}
public MagnetometerMeasurementEventArgs(MagnetometerMeasurement measurement, DateTimeOffset timestamp)
{
Measurement = measurement;
Timestamp = timestamp;
}