Manual
User manual/ Technical information
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The 28 Page total 50
The message response from the slave
Slave address
Function code Number of registers First Register data Second register data
... CRC check
1 byte 1 byte 1 byte 2 bytes 2 bytes ... 2 bytes
AA 0x04 MM VV0 VV1 ... CCCC
Address 0-247
0x04 big endian big endian big endian ... little-endian
Read and write the holding register.
The message format from by the host
Slave address Function code Register address Number of registers CRC check
1 byte 1 byte 2 bytes (big-endian). 2 Byte big-endian). 2 bytes
AA 0x03/0x06 RRRR NNNN CCCC
Address 0-247 0x03/06 big endian big endian little endian
The message response from the slave
Slave address
Function code Number of
registers
First Register
data
Second register
data
... CRC check
1 byte 1 byte 1 byte 2 bytes 2 bytes ... 2 bytes
AA 0x03/0x06 MM VV0 VV1 ... CCCC
Address 0-247
0x03/0x06 big endian big endian big endian ... little-endian
4.1.2 Register Address Definition
Register
type
Address
Name values range
Number of
registers
Register
status
Note
Input
register
0x0000 Air temperature
-40000~85000 2 R
big endian
Data format int32
Divide the data value by
1000 to get the true
measurements
0x0002 Air humidity 0~100000 2 R
0x0004
barometric
pressure
30000000~125000000
2 R
0x0006 Light intensity 0~188000000 2 R
0x0008
Minimum wind
direction
0~360000 2 R
0x000A
Maximum wind
direction
0~360000 2 R
0x000C
Average wind
direction
0~360000 2 R
0x000E
Minimum wind
speed
0~60000 2 R
0x0010
Maximum wind
speed
0~60000 2 R
0x0012 Average wind 0~60000 2 R