public CharacteristicEditPage(IGattCharacteristic selectedCharacteristic)
{
InitializeComponent();
Title = selectedCharacteristic.Uuid.ToString();
if (selectedCharacteristic.CanRead())
{
ReadCharacteristicAsync(selectedCharacteristic);
}
if (selectedCharacteristic.CanWrite())
{
//await Characteristic.Write(bytes);
}
if (selectedCharacteristic.CanNotify())
{
// TODO: couldn't get this to work for the demo.
// The docs show this, but SetNotificationValue() doesn't exist in IGattCharacteristic
//var success = selectedCharacteristic.SetNotificationValue(CharacteristicConfigDescriptorValue.Notify);
// TODO: this didn't seem to do much
selectedCharacteristic.SubscribeToNotifications();
selectedCharacteristic.WhenNotificationReceived().Subscribe(result =>
{
//result.Data
});
}
}
public static void AssertNotify(this IGattCharacteristic characteristic)
{
if (!characteristic.CanNotify())
{
throw new ArgumentException($"This characteristic '{characteristic.Uuid}' does not support notifications");
}
}
public static IObservable <byte[]> WhenReadOrNotify(this IGattCharacteristic character, TimeSpan readInterval)
{
if (character.CanNotify())
{
return(character.SubscribeToNotifications());
}
if (character.CanRead())
{
return(character.ReadInterval(readInterval));
}
throw new ArgumentException($"Characteristic {character.Uuid} does not have read or notify permissions");
}
public static IObservable <CharacteristicResult> WhenReadOrNotify(this IGattCharacteristic character, TimeSpan readInterval)
{
if (character.CanNotify())
{
return(character
.EnableNotifications()
.Where(x => x)
.Select(x => character.WhenNotificationReceived())
.Switch());
}
if (character.CanRead())
{
return(character.ReadInterval(readInterval));
}
throw new ArgumentException($"Characteristic {character.Uuid} does not have read or notify permissions");
}
public Device(Plugin.BluetoothLE.IDevice dev)
{
device = dev;
Name = dev.Name;
chararacteristicListener = device.WhenAnyCharacteristicDiscovered().Subscribe(characteristic =>
{
if (characteristic.Uuid.ToString() == BleService.CharacteristictReadUuid)
{
readCharacteristic = characteristic;
OnStateChanged(DeviceState.Connected);
RaisePropertyChanged(nameof(ConnectState));
if (readCharacteristic.CanNotify())
{
readCharacteristicObserver = characteristic.RegisterAndNotify(true).Subscribe(r =>
{
Read?.Invoke(r.Data);
},
exception =>
{
// Crashes.TrackError(exception);
});
}
}
if (characteristic.Uuid.ToString() == BleService.CharacteristicWriteUuid)
{
if (characteristic.CanWrite())
{
writeCharacteristic = characteristic;
OnStateChanged(DeviceState.Connected);
RaisePropertyChanged(nameof(ConnectState));
}
}
}, exception =>
{
// Crashes.TrackError(exception);
});
stateListener = device.WhenStatusChanged().Subscribe(f =>
{
OnStateChanged(ConnectState);
});
}
private void ListView_ItemTapped(object sender, ItemTappedEventArgs e)
{
var select = (CharacteristicsList)e.Item;
foreach (var c in AllCharacteristics)
{
if (c.Uuid == select.Uuid)
{
SelectCharacteristic = c;
info_uuid.Text = "UUID:" + SelectCharacteristic.Uuid;
info_read.Text = "CallBack UUID:";
notify_btn.Text = "Notify";
if (SelectCharacteristic.CanRead())
{
read_btn.IsVisible = true;
}
else
{
read_btn.IsVisible = false;
}
if (SelectCharacteristic.CanWrite())
{
write_btn.IsVisible = true;
}
else
{
write_btn.IsVisible = false;
}
if (SelectCharacteristic.CanNotify())
{
notify_btn.IsVisible = true;
}
else
{
notify_btn.IsVisible = false;
}
background.IsVisible = true;
info.IsVisible = true;
break;
}
}
}
public static bool CanNotifyOrIndicate(this IGattCharacteristic ch) => ch.CanNotify() || ch.CanIndicate();
