Advantech WISE-2410, Руководство пользователя

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WISE-2410 User Manual 38
A.1 LoRaWAN - Frame Payload
The message structure of LoRaWAN Frame Payload is detailed in this chapter. Each
frame payload starting with a several-bytes WISE data header (WHDR), followed by
a WISE LPWAN Payload (
WPayload ), and ending with a single-octet cyclic redun-
dancy check ( CRC ) code. A WISE Payload ( WPayload ) contains I/O statuses,
Device information, and so on.
A.1.1 WHDR Header
Frame Control: 1 byte
– First Segment bit
Set the First Segment bit to inform the server that this is the beginning of a
packet with Total Length information of WISE payload data.
Frame Payload (FRM Payload)
Octet: 1 1 0/1 0/2/8 Variable 1
Frame
Control
Frame
Sequence
Number
Total Length Source Address
WISE LPWAN
Payload
CRC
WHDR WPayload WCRC
Frame Control
bit 7 6 5 4 3, 2 1, 0
First
Segment
Address Mode
Frame Ver-
sion
0: not
first one
1: first seg.
0
Reserved 0
Reserved 0
Reserved
00: No source
address
01: the least
LSB 2 octets of
DevEUI
10: 8 octets
DevEUI
00: initial
version