private string GetUid(string fci)
{
var df27 = _tlv.FindValue(fci, "6F/A5/BF0C/DF27");
var asn = _utils.HexSlice(df27, 10, 8); // asn "0001000101000300" asn_uid "0001010003"
return(asn); //.Substring(4, 10);
}