Datasheet

AF5485 User Manual
- 5 -
TEL：[phone] www.aosong.com v1.0-20170726
6 RS485 protocol
6.1、Internal register mapping address
Registers
Addre
ss
Registers
Addre
ss
Registers
Addre
ss
Registers
Addre
ss
Humidity
0x000
0
Device Type
0x000
8
Humidity upper limit
alarm value
0x001
0
Reserved
0x001
8
Temperature
0x000
1
Version(Low 8 Byte)
0x000
9
Enabled humidity
upper limit alarm
0x001
1
Reserved
0x001
9
Reserved
0x000
2
Device ID High 16
Bit
0x000
A
Humidity lower limit
alarm value
0x001
2
Reserved
0x001
A
Reserved
0x000
3
Device ID Low 16
Bit
0x000
B
Enabled humidity
lower limit alarm
0x001
3
Reserved
0x001
B
Reserved
0x000
4
Temperature upper
limit alarm value
0x000
C
Reserved
0x001
4
Reserved
0x001
C
Reserved
0x000
5
Enabled
temperature upper
limit alarm
0x000
D
Reserved
0x001
5
Temperature
correction
update
0x001
D
Reserved
0x000
6
Temperature lower
limit alarm value
0x000
E
Reserved
0x001
6
Humidity
correction
update
0x001
E
Reserved
0x000
7
Enabled
temperature lower
limit alarm
0x000
F
Reserved
0x001
7
Reserved
0x001
F
6.2 Supported function code
0x03 multiplexer register read
0x10 multiplexer register write
@ Read instruction:
The host frame format
transmitter address+ 0x03 + register start address(2 bytes) + register number(2
bytes) +CRC low byte +CRC high byte
Transmitter return format
transmitter address + 0x03 + returns the number of bytes(1 byte) + data 0+..+ data n
+ CRC low byte + CRC high byte
@Write instruction
The host frame format