Lentgh bytes 'Little'| Str len
-------------------------------
01                   |       01
02                   |       02
....                 |
FD                   |       FD
FE                   |       FE
FF FF 00             |       FF
FF 00 01             |    01 00
FF 01 01             |    01 01
FF 02 01             |    01 02
....                 |
FF FC FF             |    FF FC
FF FD FF             |    FF FD
FF FF FF FE FF       |    FF FE
FF FF FF FF FF 00 00 |    FF FF
FF FF FF 00 00 01 00 | 01 00 00
FF FF FF 01 00 01 00 | 01 00 01
FF FF FF 02 00 02 00 | 01 00 02