/// <summary>
/// Construct a Beacon from a Bluetooth LE packet collected by Android's Bluetooth APIs,
/// including the raw bluetooth device info
/// </summary>
/// <param name="scanData">
/// The actual packet bytes
/// </param>
/// <param name="rssi">
/// The measured signal strength of the packet
/// </param>
/// <param name="device">
/// The bluetooth device that was detected
/// </param>
/// <param name="beaconBuilder">
/// Beacon Builder
/// </param>
/// <returns>
/// An instance of a <code>Beacon</code>
/// </returns>
protected Beacon FromScanData(byte[] scanData, int rssi, BluetoothDevice device, Beacon.Builder beaconBuilder)
{
int startByte = 2;
bool patternFound = false;
int matchingBeaconSize = this.matchingBeaconTypeCodeEndOffset.Value -
this.matchingBeaconTypeCodeStartOffset.Value + 1;
byte[] typeCodeBytes = LongToByteArray(this.MatchingBeaconTypeCode, matchingBeaconSize);
while (startByte <= 5)
{
if (AreByteArraysMatch(scanData, startByte + this.matchingBeaconTypeCodeStartOffset.Value, typeCodeBytes, 0))
{
patternFound = true;
break;
}
startByte++;
}
if (patternFound == false)
{
// This is not a beacon
// TODO LogManager
/*if (this.ServiceUuid == null)
{
TODO LogManager
if (LogManager.isVerboseLoggingEnabled())
{
LogManager.d(TAG, "This is not a matching Beacon advertisement. " +
"(Was expecting %s. The bytes I see are: %s",
byteArrayToString(typeCodeBytes), bytesToHex(scanData));
}
}
else
{
if (LogManager.isVerboseLoggingEnabled())
{
LogManager.d(TAG, "This is not a matching Beacon advertisement. " +
"(Was expecting %s and %s. The bytes I see are: %s",
byteArrayToString(serviceUuidBytes),
byteArrayToString(typeCodeBytes), bytesToHex(scanData));
}
}*/
return null;
}
else
{
//// TODO LogManager
//// if (LogManager.isVerboseLoggingEnabled())
//// {
//// LogManager.d(TAG, "This is a recognized beacon advertisement -- %s seen",
//// byteArrayToString(typeCodeBytes));
//// }
////
//// TODO LogManager
//// LogManager.d(Tag, "This is a recognized beacon advertisement -- " +
//// getMatchingBeaconTypeCode().ToString("x4") + " seen");
}
List<Identifier> identifiers = new List<Identifier>();
for (int i = 0; i < this.identifierEndOffsets.Count; i++)
{
Identifier identifier = Identifier.FromBytes(
scanData,
this.identifierStartOffsets[i].Value + startByte,
this.identifierEndOffsets[i].Value + startByte + 1,
this.identifierLittleEndianFlags[i]);
identifiers.Add(identifier);
}
List<long> dataFields = new List<long>();
for (int i = 0; i < this.dataEndOffsets.Count; i++)
{
string dataString = ByteArrayToFormattedString(
scanData,
this.dataStartOffsets[i].Value + startByte,
this.dataEndOffsets[i].Value + startByte,
this.dataLittleEndianFlags[i]);
dataFields.Add(long.Parse(dataString));
//// TODO LogManager
//// LogManager.d(Tag, "parsing found data field " + i);
//// TODO: error handling needed here on the parse
}
int txPower = 0;
string powerString = ByteArrayToFormattedString(
scanData,
this.powerStartOffset.Value + startByte,
this.powerEndOffset.Value + startByte,
false);
txPower = int.Parse(powerString);
// make sure it is a signed integer
if (txPower > 127)
{
txPower -= 256;
}
// TODO: error handling needed on the parse
int beaconTypeCode = 0;
string beaconTypeString = ByteArrayToFormattedString(
scanData,
this.matchingBeaconTypeCodeStartOffset.Value + startByte,
this.matchingBeaconTypeCodeEndOffset.Value + startByte,
false);
beaconTypeCode = int.Parse(beaconTypeString);
// TODO: error handling needed on the parse
int manufacturer = 0;
string manufacturerString =
ByteArrayToFormattedString(scanData, startByte, startByte + 1, true);
manufacturer = int.Parse(manufacturerString);
string macAddress = null;
string name = null;
if (device != null)
{
macAddress = device.Address;
name = device.Name;
}
return beaconBuilder
.SetIdentifiers(identifiers)
.SetDataFields(dataFields)
.SetTxPower(txPower)
.SetRssi(rssi)
.SetBeaconTypeCode(beaconTypeCode)
.SetBluetoothAddress(macAddress)
.SetBluetoothAddress(macAddress)
.SetManufacturer(manufacturer)
.Build();
}
/// <summary>
/// Construct a Beacon from a Bluetooth LE packet including the raw bluetooth device info.
/// </summary>
/// <param name="scanData">
/// The actual packet bytes
/// </param>
/// <param name="rssi">
/// The measured signal strength of the packet
/// </param>
/// <param name="device">
/// The bluetooth device that was detected
/// </param>
/// <returns>
/// An instance of a <code>Beacon</code>
/// </returns>
public Beacon FromScanData(byte[] scanData, int rssi, BluetoothDevice device)
{
return this.FromScanData(scanData, rssi, device, new Beacon.Builder());
}
