コード例 #1
0
        private void AdvertisementWatcherReceivedHandler(BluetoothLEAdvertisementWatcher sender, BluetoothLEAdvertisementReceivedEventArgs args)
        {
            foreach (var manufacturerData in args.Advertisement.ManufacturerData)
            {
                const int appleCompanyId = 0x4c;
                if (manufacturerData.CompanyId != appleCompanyId)
                {
                    continue;
                }

                BeaconAdvertisement advertisement;
                using (var dataReader = DataReader.FromBuffer(manufacturerData.Data))
                {
                    var subtype = dataReader.ReadByte();
                    if (subtype != 2)
                    {
                        return;
                    }

                    var subtypeLength = dataReader.ReadByte();
                    if (subtypeLength != 0x15)
                    {
                        return;
                    }

                    var a = dataReader.ReadInt32();
                    var b = dataReader.ReadInt16();
                    var c = dataReader.ReadInt16();
                    var d = new byte[8];
                    dataReader.ReadBytes(d);
                    var uuid = new Guid(a, b, c, d);

                    var major   = dataReader.ReadUInt16();
                    var minor   = dataReader.ReadUInt16();
                    var txPower = (sbyte)dataReader.ReadByte();

                    advertisement = new BeaconAdvertisement(
                        beaconData: new BeaconData(
                            uuid: uuid,
                            major: major,
                            minor: minor),
                        txPower: txPower,
                        rssi: args.RawSignalStrengthInDBm,
                        timestamp: args.Timestamp);
                }

                lock (_syncRoot)
                {
                    _advertisements.Add(advertisement);
                }
            }
        }
コード例 #2
0
        private void ExpirationTimerElapsedHandler(ThreadPoolTimer timer)
        {
            lock (_syncRoot)
            {
                _advertisements.RemoveAll(x => DateTimeOffset.Now - x.Timestamp > _expirationPeriod);

                if (_advertisements.Count == 0)
                {
                    NearestBeacon = null;
                }
                else
                {
                    NearestBeacon = _advertisements.MaxBy(x => x.Rssi);
                }
            }
        }
コード例 #3
0
 private void OnNearestBeaconChanged(BeaconAdvertisement e)
 {
     NearestBeaconChanged?.Invoke(this, e);
 }