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Android Code

        AdvertiseSettings settings = new AdvertiseSettings.Builder()
                .setAdvertiseMode( AdvertiseSettings.ADVERTISE_MODE_LOW_LATENCY )
                .setConnectable( true )
                .build();
        //UUID to differentiate from other apps advertising
        ParcelUuid pUuid = new ParcelUuid( UUID.fromString( getString( R.string.ble_test ) ) );

//converting our random number into byte array
        ByteBuffer b = ByteBuffer.allocate(4);
        b.putInt(num);
        byte[] chunk= b.array();
        int res=ByteBuffer.wrap(chunk).getInt();
        d(TAG,"DATA to be sent:"+res);

        //Building data which will be advertising and manufacturer id at which data is received
       AdvertiseData data = new AdvertiseData.Builder()
                .setIncludeDeviceName(false)
               .setIncludeTxPowerLevel(false)
               .addServiceUuid(pUuid)
                .addManufacturerData(1, chunk)
                .build();
           //callback for advertising
        AdvertiseCallback callback=new AdvertiseCallback() {
            @Override
            public void onStartSuccess(AdvertiseSettings settingsInEffect) {
                super.onStartSuccess(settingsInEffect);
                d(TAG,"Advertising onSuccess");
                Toast.makeText(MainActivity.this,"Advertising Success",Toast.LENGTH_LONG).show();
                d(TAG,settingsInEffect.toString());
                isadvertising=true;
            }

IOS Code

  func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
        pheripheralFound = peripheral
        central.stopScan()
        print(RSSI)
        print(advertisementData)
        print(advertisementData["kCBAdvDataManufacturerData"]!)
        let input = "0x0100c8360000"
        let data = input.data(using: .utf8)
        let manufacturerId:Range<Int> = 8..<14
        let subdata1 = data?.subdata(in: manufacturerId)
        let str1 = String(data: subdata1!, encoding:.utf8)
        print(str1!)
        print(peripheral.identifier)
    }

so I am advertising a data for example 83284312 and then I am converting into byte array and advertising from and android device but when I am trying to decode on iOS its showing wrong as "36000" example or sometimes "xftess"

Manavarthi Venkat Rao
  • 1
  • 1
  • `let data = input.data(using: .utf8)`, I don't think that's do what you think it does. Could you tell us, `let advData = advertisementData["kCBAdvDataManufacturerData"] as! Data`, and use https://stackoverflow.com/questions/39075043/how-to-convert-data-to-hex-string-in-swift to print it? You can also use this one to "find your" part. – Larme Jun 30 '20 at 08:27

0 Answers0