Eastron SDM230-LoRaWAN - Page 5

SDM230-LoRaWAN User Manual
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Encoding of data: communication data is encoded with ASCII, and each byte of data is sent with
two ASCII characters.
E.g.: a byte data 0x5b is encoded as two characters: 0x35 and 0x62 (ASCII code 0x35= "5", 0x62=
"b")
Command format definition:
I: The data format of the gateway sending the copy command:
Reserved Function
Code
The first Address of The
Register to Read Data
The Number of Registers
to Read Data
CRC Check
Codes
1byte 1byte 2byte 2byte 2byte
Note: the reserved bit is fixed as 0x01
II: the data format returned by the meter after receiving the copy command:
Reserved Function
Code
The Length of
Data Returned
Specific Data Returned by The
Meter
CRC Check
Codes
1byte 1byte 1byte N byte 2byte
Note: the reserved bit is fixed as 0x01
III: Note: the above commands need to be ASCII, so 1byte data will have 2 characters.
E.g.
1). Suppose to read the current data of the meter L1, the data sent by the gateway is the ASCII
coded data as shown in the following table:
Note: the first address of the register of the meter L1 current is 00 06 and the number of registers
is 2.
2) After receiving the above command, the meter will return the current L1 current data of the
meter, as shown in the following table after ASCII coding.