Temperature And Humidity Transmitter SHT20 High Precision Temperature And Humidity Sensor Monitoring The Modbus RS485
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$20.61
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Temperature And Humidity Transmitter SHT20 High Precision Temperature And Humidity Sensor Monitoring The Modbus RS485
$20.61
Sale price
$20.61
Regular price
$0.00
Description
SPECIFICATIONS
Application: Computer
Brand Name: SZYTF
Choice: yes
Condition: New
Dissipation Power: N/A
High-concerned chemical: none
Operating Temperature: N/A
Origin: Mainland China
Supply Voltage: N/A
Type: Module
Product description:
The product adopts industrial-grade chip, high-precisionSHT20The temperature and humidity sensors, excellent reliability, high precision and interchangeability of the product.usingRS485Hardware interface(With lightning protection design), the protocol layer is compatible with industry standardModbus Rtu -The agreement.This product setMODBUSAgreement with ordinary at an organic whole, the user can choose communication protocols, common agreement with automatic upload function (The connectionRS485Through a serial port is automatically output mode tool temperature and humidity).
Product highlights:
Industrial products, high progressSHT20The temperature and humidity sensors,RS485Communication;
standardMODBUSAgreement with ordinary at an organic whole, the user can choose communication protocol;
Baud rate can decide for themselves;
General agreement with automatic upload function, upload speed can decide for themselves.
Product parameters:
Working voltage:DC4-30 v(the highest do not exceed33 v)
The most powerful:0.2 W.
Working temperature:The temperature- 20℃+ 60℃Humidity,0% RH to 100% RH
Accuracy:The temperature+ / - 0.3℃(25℃)Humidity,(25 + / - 3% RH℃)
Output interface:RS485Communication (standardMODBUSProtocol and custom ordinary), as shown in the agreement
Device address:Can be set up1-247.By default,1
Baud rate:The default9600(the user can set),8Bits of data,1A stop, without checking
Size:60 * 30 * 18
MODBUS agreement
Function code used for the product:
0 x03:Reading a keep register
0 x04: Read input register
0 x06:Write a single register
0 x10:Write more keep registers
Register type |
Register address |
The data content |
The number of bytes |
|
The input registers |
0x0001 |
Temperature value |
2 |
0 x0002 |
Humidity value |
2 |
|
|
Keep a register |
0 x0101 |
Device address (1-247) |
2 |
0 x0102 |
Baud rate 0:9 600 And 400 200: |
2 |
|
0 x0103 |
The temperature at(/ 10) 10.0 ~ 10.0 |
2 |
|
0 x0104 |
Humidity is revised(/ 10) 10.0 ~ 10.0 |
2 |
Modbus The communication format:
The host to send data frames:
From the machine address |
Function code |
Register address High byte |
Register address The low byte |
Register number High byte |
Register number The low byte |
CRC High byte |
CRC The low byte |
The response data from the machine frame:
From the machine address |
The response function code |
The number of bytes |
register1data High byte |
register1data The low byte |
registerNdata High byte |
registerNdata The low byte |
CRC High byte |
CRC The low byte |
MODBUSThe command frame
Host read temperature command frame(0 x04):
From the machine address |
Function code |
Register address High byte |
Register address The low byte |
Register number High byte |
Register number The low byte |
CRC High byte |
CRC The low byte |
0 x01 |
0 x04 |
0x00 |
0 x01 |
0x00 |
0 x01 |
0 x60 |
0 x0a |
The response data from the machine frame:
From the machine address |
Function code |
The number of bytes |
The temperature High byte |
The temperature The low byte |
CRC High byte |
CRC The low byte |
0 x01 |
0 x04 |
0 x02 |
0 x01 |
0 x31 |
0 x79 |
0 x74 |
Temperature value= 0 x131,Converted to a decimal305, the actual temperature = 305/10 = 30.5℃
Note: the temperature is a symbol16Hexadecimal number, temperature= 0 xff33,Converted to a decimal - 205., the actual temperature= 20.5℃;
Host read humidity command frame(0 x04):
From the machine address |
Function code |
Register address High byte |
Register address The low byte |
Register number High byte |
Register number The low byte |
CRC High byte |
CRC The low byte |
0 x01 |
0 x04 |
0x00 |
0 x02 |
0x00 |
0 x01 |
0 xc1 |
0 xca |
The response data from the machine frame:
From the machine address |
Function code |
The number of bytes |
humidity High byte |
humidity The low byte |
CRC High byte |
CRC The low byte |
0 x01 |
0 x04 |
0 x02 |
0 x02 |
0 x22 |
0 xd1 |
0 xba |
Humidity value= 0 x222,Converted to a decimal546, the moisture content of the actual value= 546/10 = 54.6%;
Continuous read temperature and humidity command frame(0 x04):
From the machine address |
Function code |
Register address High byte |
Register address The low byte |
Register number High byte |
Register number The low byte |
CRC High byte |
CRC The low byte |
0 x01 |
0 x04 |
0x00 |
0 x01 |
0x00 |
0 x02 |
0 x20 |
0 x0b |
The response data from the machine frame:
From the machine address |
Function code |
The number of bytes |
The temperature High byte |
The temperature The low byte |
humidity High byte |
humidity The low byte |
CRC High byte |
CRC The low byte |
0 x01 |
0 x04 |
0 x04 |
0 x01 |
0 x31 |
0 x02 |
0 x22 |
0 x2a |
0 xce |
Read the contents of the registers(0 x03):
Take the case of reading from the machine address:
From the machine address |
Function code |
Register address High byte |
Register address The low byte |
Register number High byte |
Register number The low byte |
CRC High byte |
CRC The low byte |
0 x01 |
0 x03 |
0 x01 |
0 x01 |
0x00 |
0 x01 |
0 xd4 |
0 x0f |
Response from the machine frame:
From the machine address |
Function code |
The number of bytes |
From the machine address High byte |
From the machine address The low byte |
CRC High byte |
CRC The low byte |
0 x01 |
0 x03 |
0 x02 |
0x00 |
0 x01 |
0 x30 |
0 x18 |
Modify the contents of the registers(0 x06):
To modify the machine address, for example:
From the machine address |
Function code |
Register address High byte |
Register address The low byte |
Register values High byte |
Register values The low byte |
CRC High byte |
CRC The low byte |
0 x01 |
0 x06 |
0 x01 |
0 x01 |
0x00 |
0 x08 |
0 xd4 |
0 x0f |
Modify the machine address: 0 x08 = 8
The response from the machine frame(And send the same):
From the machine address |
Function code |
Register address High byte |
Register address The low byte |
Register values High byte |
Register values The low byte |
CRC High byte |
CRC The low byte |
0 x01 |
0 x06 |
0 x01 |
0 x01 |
0x00 |
0 x08 |
0 xd4 |
0 x0f |
Continuously change keep registers(0 x10):
From the machine address |
Function code |
The starting address High byte |
The starting address The low byte |
Register number High byte |
Register number The low byte |
The number of bytes |
register1High byte |
register1The low byte |
register2High byte |
register2The low byte |
CRC High byte |
CRC The low byte |
0 x01 |
0 x06 |
0 x01 |
0 x01 |
0x00 |
0 x02 |
0 x04 |
0x00 |
0 x20 |
0 x25 |
0 x80 |
0 x25 |
0 x09 |
Modify the machine address: 0 x20 = 32
Baud rate: 0 x2580 = 9600
Response from the machine frame:
From the machine address |
Function code |
Register address High byte |
Register address The low byte |
Register number High byte |
Register number The low byte |
CRC High byte |
CRC The low byte |
0 x01 |
0 x06 |
0x00 |
0x11 |
0x00 |
0 x04 |
0 xd4 |
0 x0f |
Ordinary version of the agreement
The default baud rates,9600(the user can set),8Bits of data,1A stop, without checking
RS485 communication
A serial port command |
instructions |
READ |
Report triggered a temperature and humidity (27.4℃67.7%, The temperature27.4℃ humidity67.7%) |
AUTO |
Start the temperature and humidity automatically report function (Same as above) |
STOP |
Stop the temperature and humidity automatically report function |
BR: XXXX |
Set the baud rate 9600 ~ 19200 (BR: 9600 Baud rate for9600). |
TC: XX. X |
Set the temperature calibration (10.0 ~ 10.0) (TC: 02.0Revised for temperature2.0℃) |
HC: XX. X |
Set the humidity calibration (10.0 ~ 10.0) (HC: 05.1 Humidity is revised- 5.1%) |
HZ: XXX |
Set the temperature and humidity reporting rate (0.5, 1,2,5,10) (HZ: 2 Automatically report rate 2 hz) |
PARAM |
Read the system current Settings |
PARAMinstruction:
TC: 0.0, HC: 0.0, BR: 9600 HZ: 1- >The temperature at0.0Humidity is revised0.0Baud rate9600Report the rate 1 hz
SLAVE_ADD: 1. - >MODBUSFrom the machine address 0 x01
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30-Day Return Policy
- Returns: 30-day hassle-free return window
- Condition: Items must be unused and in original packaging
- Refund: Full refund processed within 3-5 business days
Why Choose Us?
- Factory Direct: ISO/TS 16949 certified manufacturer
- Quality: 100% electrical continuity tested before shipment
- Experience: 15+ years in automotive connector industry
- Support: Professional technical support available
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