RS485 Temperature and Humidity Sensor Modbus RTU Use By SHT30

product size: 65*45*28mm
install: support 35mm DIN RAIL
power supply: DC 5-36V
temperature: -40℃-- +125℃
humidity: 0--100% RH
temperature accuracy: 0.1℃
humidity accuracy: 0.1% RH
communication: RS485
RS485 baud rate: 9600/14400/19200/38400/56000/57600/115200 bps
RS485 address: 1--255 editable

use by SHT30 temperature and humidity sensor inside.

modbus protocol:

A. input register function:

temperature : 16bit unsigned integer register
humidity: 16bit unsigned integer register

address     function
0000H        temperature value
             unit: ℃
             fixed 1 decimal
             (1) >0℃: register data<10000
                          for example: register value=250, actual temperature: 250*0.1=25℃
             (2) <0℃: register data>=10000
                          for example: register value=10250, actual temperature: -1*(10250-10000)*0.1=25℃
------------------------------------
0001H        humidity value
             unit: %RH
             fixed 1 decimal
                          for example: register value=500, actual humidity: 500*0.1=50(%RH)
------------------------------------
0002H        temperature value
0003H        unit: ℃   decode: 32bit float data
------------------------------------
0004H        humidity value
0005H        unit: %RH   decode: 32bit float data

B. Hold register function:
The contents of the register are saved when power is turned off. The holding register is a readable and writable register. The value in each register is a 16-bit unsigned integer.

address     function
0000H        temperature value
             unit: ℃
             fixed 1 decimal
             (1) >0℃: register data<10000
                          for example: register value=250, actual temperature: 250*0.1=25℃
             (2) <0℃: register data>=10000
                          for example: register value=10250, actual temperature: -1*(10250-10000)*0.1=25℃
------------------------------------
0001H        humidity value
             unit: %RH
             fixed 1 decimal
                          for example: register value=500, actual humidity: 500*0.1=50(%RH)
------------------------------------
0002H        temperature value
0003H        unit: ℃   decode: 32bit float data
------------------------------------
0004H        humidity value
0005H        unit: %RH   decode: 32bit float data
------------------------------------
000AH        RS485 bus address(1-255), default:1  
             Note: This parameter is saved after power-off and will take effect after power-on again after modification.
------------------------------------
000BH        Baud rate setting:
             0:4800  1:9600(default) 2:14400 3:19200 4:38400 5:56000 6:57600 7:115200
             Note: This parameter is saved after power-off and will take effect after power-on again after modification.
------------------------------------
003DH        Parity settings
             0:None(default)  1:odd parity 2:even parity
             Note: This parameter is saved after power-off and will take effect after power-on again after modification.