protected override void OnCharacteristicValueChanged(GattCharacteristic sender, GattValueChangedEventArgs eventArgs)
{
if (sender.Uuid == MovementCharacteristicUuid)
{
if (_movementValueChanged != null)
{
uint dataLength = eventArgs.CharacteristicValue.Length;
using (DataReader reader = DataReader.FromBuffer(eventArgs.CharacteristicValue))
{
if (dataLength == 18)
{
MovementMeasurement measurement = new MovementMeasurement();
short gx = ReadBigEndian16bit(reader);
short gy = ReadBigEndian16bit(reader);
short gz = ReadBigEndian16bit(reader);
short ax = ReadBigEndian16bit(reader);
short ay = ReadBigEndian16bit(reader);
short az = ReadBigEndian16bit(reader);
short mx = ReadBigEndian16bit(reader);
short my = ReadBigEndian16bit(reader);
short mz = ReadBigEndian16bit(reader);
measurement.GyroX = ((double)gx * 500.0) / 65536.0;
measurement.GyroY = ((double)gy * 500.0) / 65536.0;
measurement.GyroZ = ((double)gz * 500.0) / 65536.0;
measurement.timestamp = eventArgs.Timestamp;
measurement.mac = _sensortag_mac;
measurement.AccelX = ((double)ax / 32768);
measurement.AccelY = ((double)ay / 32768);
measurement.AccelZ = ((double)az / 32768);
// on SensorTag CC2650 the conversion to micro tesla's is done in the firmware.
measurement.MagX = (double)mx;
measurement.MagY = (double)my;
measurement.MagZ = (double)mz;
OnMovementMeasurementValueChanged(new MovementEventArgs(measurement, eventArgs.Timestamp));
}
}
}
}
}
public MovementEventArgs(MovementMeasurement measurement, DateTimeOffset timestamp)
{
Measurement = measurement;
Timestamp = timestamp;
}
public SingleRecord()
{
this.Value = new MovementMeasurement(0, 0, 0);
this.Time = DateTime.Now;
}