private async Task <string> waitSendRequest(Request req)
{
if (connectionState != ConnectionState._connected)
{
return(lastError = "Error: No connection available");
}
if (req == null)
{
return(lastError = "Error: Unable to send request");
}
Log.WriteLine("~~~Waiting : " + req.index);
bool isanswered = await req.IsAnswered();
if (!isanswered)
{
Log.WriteLine("~~~not answered : " + req.index);
return(lastError = "Error: Did not received an answer");
}
IBuffer myresponse = GattConvert.ToIBufferFromArray(req.GetResponse());
string strresponse = GattConvert.ToHexString(myresponse);
strresponse = strresponse.Replace("-", "");
Log.WriteLine("<---Response : " + req.index + " in " + Environment.CurrentManagedThreadId + "with " + strresponse);
return(strresponse);
}
// Send one packet of BLE frame
private async Task <bool> send_one_TX_Packet(int num)
{
int len = 0;
int offset = 0;
if (SPPOverLECharacteristic == null)
{
setUpSPP();
await SPPOverLECharacteristic.WriteClientCharacteristicConfigurationDescriptorAsync(
GattClientCharacteristicConfigurationDescriptorValue.Notify);
}
if (SPPOverLECharacteristic == null)
{
throw new InvalidOperationException("Invalid BLE Characteristics");
}
// Check if last packet
if (num > 0)
{
offset = m_TX_Buffer_rest + ((num - 1) * LEN_PACKET);
len = LEN_PACKET;
}
else
{
offset = 0;
len = m_TX_Buffer_rest;
}
// Extract frame from buffer
byte[] packet = new byte[len + 1];
packet[0] = (byte)offset;
for (int i = 0; i < len; i++)
{
packet[i + 1] = m_TX_buffer[offset + i];
}
Log.WriteLine("~~~ send: " + CurrentRequest.index + " data=[" + BitConverter.ToString(packet, 0, packet.Length) + "]");
Windows.Storage.Streams.IBuffer packetBuffer = GattConvert.ToIBufferFromArray(packet);
if (SPPOverLECharacteristic != null)
{
GattCommunicationStatus status = await SPPOverLECharacteristic.WriteValueAsync(packetBuffer, GattWriteOption.WriteWithoutResponse);
return(status == GattCommunicationStatus.Success);
}
return(false);
}