Connect-IQ Ble advertising layer parsing bug, prevent many devices to function properly. (paired or not paired) Toybox::BluetoothLowEnergy::ScanResult:getRawData(), getServiceData , getServiceUuids are broken

On one device where I don't see a UUID, the number of bytes changes from 21-27-30.  I'm wondering if some things may be hidden due to GDPR or something, and there's a bug there.

The screen shot is for a thingy52 (named "thing17") where the name and UUID are both available.

great, I have to learn a bit more on the UI side I admit

Maybe you can still look into the code, actually, it's clearer than raw bytes for users , so you can see what's in there, I'll likely write decoders for the flags, etc , a bit later.

Could you also check if you have an android phone with nrf connect, if you see the same advertising bytes on your devices ? because I was surprised to see so much truncated.

Regards.

Xavier.

I ended up adding my own display before I saw this and the store has the updated version of my app.  Pressing select switches between the summary (what was there before) and a dump of the raw data.

 currentByte=currentByte+currentSize+1;
        
        }        
        System.println("--end of AD Dump]");

}

was missing at the end :)

Hi Jim,

thanks for the reply.

The point here, is that for those devices, the uuid will never be shown, at any stages. Those devices are forever not useable until garmin fix the advertising bytes parsing, which I believe occurs before the profile ;)

If you want to do raw parsing, feel free to use this, clunky code, but did on the corner of a table, just my first attempt at monkey c

It takes rawdata from the scanresults as argument :

  function rawdataDecoder(rawBytes){
    
        var currentByte=0;
        var currentSize=0;
        var currentCode=0;
        var currentDataString;
        var currentDataHex;
        var currentDataRaw;
        
        
        var keyConvertOptionsHex = {
                    :fromRepresentation => StringUtil.REPRESENTATION_BYTE_ARRAY,
                    :toRepresentation => StringUtil.REPRESENTATION_STRING_HEX
                    
                };
                
                
        System.println("raw Adverting Data:"+rawBytes);
        System.println("--[AD Dump:");
        while(currentByte<rawBytes.size()){
        
            currentSize=rawBytes[currentByte];
            currentCode=rawBytes[currentByte+1];
            
            
            System.println("----[Record Dump:");
            System.println("\tAD Len:"+currentSize);
            System.println("\tAD Type:"+EIRCodeToString[currentCode]);
            System.println("\tAD Type Integer:"+currentCode);
            
            
            if(currentSize>1){
                currentDataRaw=rawBytes.slice(currentByte+2,currentByte+1+currentSize);
                currentDataHex        = StringUtil.convertEncodedString(currentDataRaw, keyConvertOptionsHex);
                System.println("\tAD Data Integer:"+currentDataRaw);
                System.println("\tAD Data Hex:"+currentDataHex);
                switch(currentCode){
                    case 1:
                        break;
                    case 3:
                        System.println("\tAD Data 16bits Service Class UUIDs:");
                        for( var i = 0; i < currentDataRaw.size(); i=i+2 ) {
                        //var uuid=StringUtil.convertEncodedString(currentDataRaw.slice(i+1,i+1), keyConvertOptionsHex);
                        //uuid=StringUtil.convertEncodedString(currentDataRaw.slice(i,i), keyConvertOptionsHex);
                         var uuid=Lang.format("0x$2$$1$",[currentDataRaw[i+1].format("%02X"), currentDataRaw[i].format("%02X")]);
                         
                         System.println("\t\tUUID: "+uuid);
                         }
                        break;
                    default:
                        
                        currentDataString="";
                        var sz=currentDataRaw.size();
                        for(var i=0;i<sz;i++) {currentDataString=currentDataString+currentDataRaw[i].toChar();}
                        
                        System.println("\tAD Data String:"+currentDataString);    
                        break;
                }                
                        
                            
            }

this is also what I'm using to resolve types , it's not complete, but the most common ones are here (extract from bluetooth sig)

 var EIRCodeToString =  [ "0", "Flags" ,"Incomplete List of 16-bit Service Class UUID" ,"Complete List of 16-bit Service Class UUIDs" ,"Incomplete List of 32-bit Service Class UUIDs" ,"Complete List of 32-bit Service Class UUIDs" ,"Incomplete List of 128-bit Service Class UUIDs" ,"Complete List of 128-bit Service Class UUIDs" ,"Shortened Local Name" ,"Complete Local Name" ,"Tx Power Level", "0B", "0C", "Class of Device", "Simple Pairing Hash C", "Simple Pairing Randomizer R",
    "Device ID","Security Manager Out of Band Flags","Slave Connection Interval Range","13","List of 16-bit Service Solicitation UUIDs","List of 128-bit Service Solicitation UUIDs","Service Data","Public Target Address","Random Target Address","Appearance","Advertising Interval","LE Bluetooth Device Address","LE Role","Simple Pairing Hash C-256","Simple Pairing Randomizer R-256","List of 32-bit Service Solicitation UUID",
    "Service Data - 32-bit UUID","Service Data - 128-bit UUID","12","13","14","15","16","17","18","19","1A","1B","1C","1D","1E","2F",
    "30","31","12","13","14","15","16","17","18","19","1A","1B","1C","1D","1E","3F",
    "40","11","12","13","14","15","16","17","18","19","1A","1B","1C","1D","1E","4F",
    "50","11","12","13","14","15","16","17","18","19","1A","1B","1C","1D","1E","5F",
    "60","11","12","13","14","15","16","17","18","19","1A","1B","1C","1D","1E","6F",
    "70","11","12","13","14","15","16","17","18","19","1A","1B","1C","1D","1E","7F",
    "80","11","12","13","14","15","16","17","18","19","1A","1B","1C","1D","1E","8F",
    "90","11","12","13","14","15","16","17","18","19","1A","1B","1C","1D","1E","9F",
    "A0","11","12","13","14","15","16","17","18","19","1A","1B","1C","1D","1E","AF",
    "B0","11","12","13","14","15","16","17","18","19","1A","1B","1C","1D","1E","BF",
    "C0","11","12","13","14","15","16","17","18","19","1A","1B","1C","1D","1E","CF",
    "D0","11","12","13","14","15","16","17","18","19","1A","1B","1C","1D","1E","DF",
    "E0","11","12","13","14","15","16","17","18","19","1A","1B","1C","1D","1E","EF",
    "F0","11","12","13","14","15","16","17","18","19","1A","1B","1C","1D","1E","Manufacturer Specific Data"
    ];

Kind Regards.

Klick