/// <summary>
/// Event raised when the bluettoth device notify a value change
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void OnCharacteristicValueChangeEvent(object sender, Plugin.BLE.Abstractions.EventArgs.CharacteristicUpdatedEventArgs e)
{
if (this.eventAggregator == null)
{
eventAggregator = (IEventAggregator)App.Current.Container.Resolve(typeof(IEventAggregator));
}
DialogBehaviourHolder beahaviour = FreeStyleLibreUtils.RespondToPacketBehaviour(e.Characteristic.Value);
switch (beahaviour.ResponseType)
{
case PacketResponseType.Accept:
eventAggregator.GetEvent <MeasureChangeEvent>().Publish(beahaviour.ReceivedData);
this.MeasureServiceState = MeasureServiceState.RECEIVING_DATA;
break;
case PacketResponseType.AnswerBack:
WriteCharacteristicAsync(MiaoMiaoProtocol.NRF_UART_RX, beahaviour.Response);
break;
case PacketResponseType.Refuse:
this.MeasureServiceState = MeasureServiceState.REFUSED_DATA_THEN_WAIT;
break;
case PacketResponseType.Ignore:
default:
this.MeasureServiceState = MeasureServiceState.WAITING_DATA;
break;
}
}
/// <summary>
/// This method analyzes the received data and determines what is the behaviour to react (Accept, answer, ignore, refuse)
/// </summary>
/// <param name="DialogProtocolHolder">Holds the </param>
/// <returns></returns>
public static DialogBehaviourHolder RespondToPacketBehaviour(byte[] packet)
{
DialogBehaviourHolder holder = new DialogBehaviourHolder();
holder.ReceivedData = packet;
// MIAOMIAO PROTOCOL
if (packet.Length == 1 && packet[0] == 0x32)
{
byte[] resetallowNewSensorValue = new byte[2];
byte[] frequency = new byte[2];
byte[] ack = new byte[1];
// MIAOMIAO PROTOCOL
resetallowNewSensorValue[0] = 0xD3;
resetallowNewSensorValue[1] = 0x01;
frequency[0] = 0xD1;
frequency[1] = 0x01;
holder.Response.Add(resetallowNewSensorValue);
holder.Response.Add(frequency);
holder.Response.Add(ack);
holder.ResponseType = PacketResponseType.AnswerBack;
}
// MIAOMIAO PROTOCOL
// received when the Miaomiao is not connected to the sensor
else if (packet.Length == 1 && packet[0] == 0x34)
{
holder.ResponseType = PacketResponseType.Ignore;
}
// MIAOMIAO PROTOCOL
// I don't know what to do with this ==> we will need to raise an error in this case
// CAUTION : The behaviour should no be PacketResponseType.Ignore in this case
else if (packet.Length == 2)
{
holder.ResponseType = PacketResponseType.Refuse;
}
// MIAOMIAO PROTOCOL
// The data received is accepted. We will process it
else
{
holder.ResponseType = PacketResponseType.Accept;
}
Log.Debug(LOG_TAG, $"FreeStyleLibreUtils.RespondToPacket : answer={holder.ResponseType}");
return(holder);
}
