protected override void OnCharacteristicValueChanged(GattCharacteristic sender, GattValueChangedEventArgs eventArgs)
{
if (sender.Uuid == LightIntensityCharacteristicUuid)
{
if (_lightValueChanged != null)
{
uint dataLength = eventArgs.CharacteristicValue.Length;
using (DataReader reader = DataReader.FromBuffer(eventArgs.CharacteristicValue))
{
if (dataLength == 2)
{
ushort rawData = ReadBigEndianU16bit(reader);
uint m = (uint)(rawData & 0x0FFF);
uint e = ((uint)(rawData & 0xF000)) >> 12;
double lux = (double)m * (0.01 * Math.Pow(2.0, e));
var measurement = new LightIntensityMeasurement();
measurement.Lux = lux;
OnLightIntensityMeasurementValueChanged(new LightIntensityMeasurementEventArgs(measurement, eventArgs.Timestamp, _sensortag_mac));
}
}
}
}
}
public LightIntensityMeasurementEventArgs(LightIntensityMeasurement measurement, DateTimeOffset timestamp, string mac)
{
Measurement = measurement;
Mac = mac;
Timestamp = timestamp;
}
public LightIntensityMeasurementEventArgs(LightIntensityMeasurement measurement, DateTimeOffset timestamp)
{
Measurement = measurement;
Timestamp = timestamp;
}