public static (string result, CommonManufacturerType) ParseManufacturerData(BluetoothLEAdvertisementDataSection section, sbyte txPower)
{
CommonManufacturerType manufacturerType = CommonManufacturerType.Other;
try
{
var bytes = section.Data.ToArray();
var dr = DataReader.FromBuffer(section.Data);
dr.ByteOrder = ByteOrder.LittleEndian; // bluetooth defaults to little endian.
var companyId = dr.ReadUInt16();
var companyName = GetBluetoothCompanyIdentifier(companyId);
var sb = new StringBuilder();
sb.Append(companyName);
sb.Append(": ");
bool displayAsHex = true;
switch (companyId)
{
case 0x4C: // Apple
var appleIBeacon = AppleIBeacon.Parse(section, txPower);
if (appleIBeacon.IsValid)
{
sb.Append(appleIBeacon.ToString());
sb.Append("\n");
displayAsHex = false; // we have a better display
}
else if (appleIBeacon.IsApple10)
{
manufacturerType = CommonManufacturerType.Apple10;
}
break;
}
if (displayAsHex)
{
while (dr.UnconsumedBufferLength > 0)
{
var b = dr.ReadByte().ToString("X2");
sb.Append(b); // As hex!
sb.Append(' ');
}
sb.Append('\n');
}
return(sb.ToString(), manufacturerType);
}
catch (Exception)
{
return("??\n", manufacturerType);
}
}
public static AppleIBeacon Parse(BluetoothLEAdvertisementDataSection section, sbyte RSSI)
{
AppleIBeacon retval = new AppleIBeacon();
try
{
var dr = DataReader.FromBuffer(section.Data);
dr.ByteOrder = ByteOrder.LittleEndian; // bluetooth defaults to little endian.
retval.CompanyId = dr.ReadUInt16(); // Will be 76 == 0x4c but that's explicitly not enforced here
retval.BeaconType = dr.ReadByte();
retval.BeaconLen = dr.ReadByte();
switch (retval.BeaconType)
{
case 0x02:
// See https://github.com/wrightLin/RaspiJob/blob/6004e46ec28535546add496eff0ed8d7947ed563/Beacons.Helper/Beacons.cs
// See https://github.com/blueSense/hub-application/blob/59ab67c17cb71883cf19027bf62050b953644750/lib/bluesense-superhub/monitor/parsers/ibeacon.js
if (retval.BeaconLen < 0x15)
{
return(retval);
}
byte[] guidBytes = new byte[16];
dr.ReadBytes(guidBytes);
retval.BeaconGuid = new Guid(guidBytes);
retval.Major = dr.ReadUInt16();
retval.Minor = dr.ReadUInt16();
retval.MeasuredPower = (sbyte)dr.ReadByte();
retval.MeasuredPower = RSSI;
break;
case 0x10:
case 0x12:
// TODO: how to handle a typical phone?
break;
default:
break; //TODO: what value here?
}
}
catch (Exception)
{
;
}
return(retval); // if there was an exception, the beacon is invalid...
}
