PATLITE WDR-LE - Manual (Page 46)

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Wireless Data Aquisition System Comprehensive User's Manual
8.3 Cmd Packet Classifi cation
■ Transmission command between Transmitter and Receiver
Two diff erent packets for data transmissions are necessary for the Transmitter and Receiver. Details are
determined by the command.
＜ Data Transmission Request ＞
SOP Cmd
Len
Data
FCS
0x02 0x00 0x0A Short Address
Packet
Number
Special
Command
Special
Data
1 byte 2 bytes 1 byte 2 bytes 1 byte 1 byte Undefi ned 1 byte
① ② ③ ④
① Short Address ： Transmitter header network address.
This value is already assigned an undefi ned 2 byte value when connecting to
the network address destination.
The short address of the reciever is fi xed at 0x0000.
② Packet Number ： An arbitrary value is added when data is transmitted.
The value changes when its determined that data has been missing.
It is recommend to start from 0 and increment by a value of 1.
③ Special Command ： Special command to exchange data between Transmitter and Receiver.
④ Special Data ： Data value specifi ed by special command.
＜ Data Reception Notifi cation ＞
SOP Cmd
Len
Data
FCS
0x02 0x20 0x0B
Short
Address
Packet
Number
0x00 LQI 0x010106
Transmission
MAC Address
Special
Command
Special
Data
1 byte 2 bytes 1 byte 2 bytes 1 byte 1 byte 1 byte 3 bytes 8 bytes 1 byte Undetermined 1 byte
① ② ③ ④ ⑤ ⑥
① Short Address ： Transmitter header network address.
This value is already assigned an undefi ned 2 byte value when
connecting to the network address destination.
② Packet Number ： Matches data transmission packet number during data transmission.
③ LQI ： Quality of communication between transmitter unit and fi nal stage of
wireless receiver.
Displays from 0x00（Minimum）to 0xFF（Maximum）for the range.
See the formula below to convert to dBm:
dBm= − (190 − LQI ч 1.625) ч 2
④ Transmission MAC Address ： Transmission from Transmitter MAC Address.
⑤ Special Command ： Special command to exchange data between Transmitter and Receiver.
⑥ Special Data ： Data value specifi ed by special command.