// Set the alert-level characteristic on the remote device
public async Task SetAlertLevelCharacteristic()
{
// try-catch block protects us from the race where the device disconnects
// just after we've determined that it is connected.
try
{
byte[] data = new byte[1];
data[0] = (byte)alertLevel;
// The LinkLoss service should contain exactly one instance of the AlertLevel characteristic
GattCharacteristic characteristic = linkLossService.GetCharacteristics(GattCharacteristicUuids.AlertLevel)[0];
await characteristic.WriteValueAsync(data.AsBuffer(), GattWriteOption.WriteWithResponse);
}
catch (Exception)
{
// ignore exception
}
}
private void GetAllCharacteristics(List <GattCharacteristic> characteristics)
{
#if WINDOWS_UWP || WINDOWS_PHONE_APP
foreach (Windows.Devices.Bluetooth.GenericAttributeProfile.GattCharacteristic characteristic in _service.GetAllCharacteristics())
{
characteristics.Add(characteristic);
}
#elif WINDOWS_PHONE || WINDOWS_APP
foreach (Windows.Devices.Bluetooth.GenericAttributeProfile.GattCharacteristic characteristic in _service.GetCharacteristics(Guid.Empty))
{
characteristics.Add(characteristic);
}
#endif
}
