The uPart carry 4 byte significant ID, if uPart packets are transported in a medium with 8 byte ID, then the first 4 byte are 1.2.3.4

So, e.g. in the particle analyzer, the mupart id is:
1.2.3.4.id0.id1.id2.id3

id0, id1= defines the production line

00 00: hand soldered
00 01: production august 2005: 315 Mhz (id2,id3:  0x0,0x0 ->0x 02,FF)
00 02: production august 2005: 868 Mhz (id2,id3;  0x0,0x0 -> 0x0,0x95)
00 03: production February 2006: 315 Mhz (id2,id3:  0x0,0x0 ->0x 02,FF)
00 04: production February 2006: 868 Mhz (id2,id3:  0x0,0x0 ->0x 02,FF)


id2,id3: running id number