Advantech WISE-2410, Руководство пользователя

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43 WISE-2410 User Manual
Appendix A
W
ISE LPWAN
P
ayload
Format
A.2 Packet Fragmentation and Reassembly
Because the data rate is controlled by the network, the length of each uplink is not
fixed. The Frame Payload (FRM Payload) will be split into multiple fragments.
A complete frame can be divided into several uplink messages.
1
st
message:
2
nd
~ n
th
messages
The last message:
Frame Payload (FRM Payload)
WHDR WPayload WCRC
WHDR WPayload*
byte: 1 1 1 0 Variable
Frame
Control Frame Sequence
Number
Total Length Source Address
A partial of WISE
Payload
0x80 S M
WHDR WPayload*
byte: 1 1 0 0 Variable
Frame
Control Frame Sequence
Number
Total Length Source Address
A partial of WISE
Payload
0x00 (S+1)~
WHDR WPayload* WCRC
byte: 1 1 0 0 Variable 1
Frame
Control Frame Sequence
Number
Total Length Source Address
The rest of WISE
Payload
CRC
0x00 (S+n) 0x23