0C001A0001000800030000010501000000800100001003103F002A00

The above Composition Data Page 0 can be described as follows:

0C00 1A00 0100 0800 0300 0001 05 01 0000 0080 0100 0010 0310 3F002A00

• CID is 0x000C
• PID is 0x001A
• VID is 0x0001
• CRPL is 0x0008
• Features is 0x0003 – Relay and Friend features.
• Loc is "front" – 0x0100
• NumS is 5
• NumV is 1
• The Bluetooth SIG Models supported are:
  • 0x0000, 0x8000, 0x0001, 0x1000, 0x100

Note: The composition data is little-endian.

I know the usage of Arraybuffer and untyped arrays but confused about how to set offset according to extraction of different IDs and SIG Models. I have to make changes in this code (extracting first 4 IDs), particularly:

var string  = "0123 4567 89AB";

var string1 =  string.split(" ").join(""); 
          
var buf = new ArrayBuffer(string1.length/2); 

var hex = new Uint16Array(buf)
     
for (var i=0, strLen=string1.length; i < strLen; i+=4){

    hex[i/4] = 0


    hex[i/4] += (parseInt(string1[i+0],16) << (4*1))
    hex[i/4] += (parseInt(string1[i+1],16) << (4*0))
    hex[i/4] += (parseInt(string1[i+2],16) << (4*3))
    hex[i/4] += (parseInt(string1[i+3],16) << (4*2))
}

for (var i=0, strLen=string1.length; i < strLen/4; i++){

    document.write("0x0" + hex[i].toString(16))
}