private void GattObserverOnCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, GattStatus status)
{
if (_onRead != null)
{
_onRead(characteristic.GetValue(), status);
}
}
private void NotifyOnValueChanged(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic)
{
var hexText = FindViewById<TextView>(Resource.Id.ReceivedNotificationHex);
var stringText = FindViewById<TextView>(Resource.Id.ReceivedNotificationString);
var receivedBytes = characteristic.GetValue();
RunOnUiThread(() =>
{
hexText.SetText(BitConverter.ToString(receivedBytes), TextView.BufferType.Normal);
stringText.SetText(Encoding.ASCII.GetString(receivedBytes), TextView.BufferType.Normal);
});
}
public override void OnCharacteristicRead(bt.BluetoothGatt gatt, bt.BluetoothGattCharacteristic characteristic, [GeneratedEnum] bt.GattStatus status)
{
base.OnCharacteristicRead(gatt, characteristic, status);
this.CharacteristicRead?.Invoke(this, new CharacteristicValueChangedEventArgs(gatt, characteristic, status));
byte[] value = characteristic.GetValue();
var myChar = this.ServicesById[characteristic.Service.Uuid].CharacteristicsById[characteristic.Uuid];
// If the system architecture is little-endian (that is, little end first),
// reverse the byte array.
if (BitConverter.IsLittleEndian)
{
Array.Reverse(value);
}
myChar.GetValueCompletionSource?.SetResult(value);
myChar.GetValueCompletionSource = null;
}
public void BroadcastUpdate (String action, BluetoothGattCharacteristic characteristic)
{
Intent intent = new Intent (action);
// This is special handling for the Heart Rate Measurement profile. Data parsing is
// carried out as per profile specifications:
// http://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml
if (UUID_HEART_RATE_MEASUREMENT == (characteristic.Uuid)) {
GattProperty flag = characteristic.Properties;
GattFormat format = (GattFormat) (-1);
if (((int) flag & 0x01) != 0) {
format = GattFormat.Uint16;
Log.Debug (TAG, "Heart rate format UINT16.");
} else {
format = GattFormat.Uint8;
Log.Debug (TAG, "Heart rate format UINT8.");
}
var heartRate = characteristic.GetIntValue (format, 1);
Log.Debug (TAG, String.Format ("Received heart rate: {0}", heartRate));
intent.PutExtra (EXTRA_DATA, heartRate);
} else {
// For all other profiles, writes the data formatted in HEX.
byte[] data = characteristic.GetValue ();
if (data != null && data.Length > 0) {
StringBuilder stringBuilder = new StringBuilder (data.Length);
foreach (byte byteChar in data)
stringBuilder.Append (String.Format ("{0}02X ", byteChar));
intent.PutExtra (EXTRA_DATA, Convert.ToBase64String (data) + "\n" + stringBuilder.ToString());
}
}
SendBroadcast (intent);
}
Task <byte[]> PlatformGetValue()
{
return(Task.FromResult(_characteristic.GetValue()));
}
byte[] PlatformGetValue()
{
return(_characteristic.GetValue());
}
public override void OnCharacteristicWrite(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, GattStatus status)
{
base.OnCharacteristicWrite(gatt, characteristic, status);
string hex = BitConverter.ToString(characteristic.GetValue());
Console.WriteLine("GattCallBack: OnCharacteristicWrite: " + hex.Replace("-", ""));
}
public override void OnCharacteristicWrite(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, GattStatus status)
{
base.OnCharacteristicWrite(gatt, characteristic, status);
Trace.Message("OnCharacteristicWrite: value {0} status {1}", characteristic.GetValue().ToHexString(), status);
CharacteristicValueWritten?.Invoke(this, new CharacteristicWriteCallbackEventArgs(characteristic, GetExceptionFromGattStatus(status)));
}
public override void OnCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, GattStatus status)
{
base.OnCharacteristicRead(gatt, characteristic, status);
Trace.Message("OnCharacteristicRead: value {0}; status {1}", characteristic.GetValue().ToHexString(), status);
CharacteristicValueUpdated?.Invoke(this, new CharacteristicReadCallbackEventArgs(characteristic));
}
