Brand Name:icchipcn.com
Model Number:Modbus SHT20
emperature and humidity transmitter SHT20 sensor Modbus RS485
Product Description:
Product adopts industrial-grade chip, high-precision SHT20 temperature and humidity sensors, ensure the products with good reliability, high precision and interchangeability.
Adopt RS485 hardware interface (with the lightning protection design), the protocol layer compatible with standard industrial Modbus Rtu protocol.
This product integrating MODBUS protocol with ordinary, users can choose communication protocols, common agreement with automatic upload function(Connect the RS485 serial interface mode tool by automatically output temperature and humidity).
MODBUSPROTOCAL
Modbus Function Code:
0x03:Read keep register
0x04:Read input register
0x06:Write a singlekeepregister
0x10:Write more keep registers
ModbusFrame format:
Master send format:
The responseformat of slave:
MODBUSCOMMAND
Masterread temperature command frame(0x04):
The response data fromslave:
Temperature value=0x131,converted to a decimal305,the actual temperature value= 305 / 10 = 30.5°
Note: the temperature is signed hexadecimal number, temperature value = 0xFF33, converted to a decimal - 205, the actual temperature =-20.5 °;
Masterread humidity command frame(0x04)
The response data fromslave:
Humidity value = 0x222, converted to a decimal 546, actual humidity value = 546/10 = 54.6%;
Continuous read temperature and humidity command frame(0x04):
The response data fromslave:
Read keep register(0x03):
Readdevice addressfrom theslave:
The response data fromslave:
Modify the contents of the registers(0x06):
Modify theslaveaddress register:
Modify theslaveaddress:0x08 = 8
The response data fromslave(And send the same):
Continuously change keep registers(0x10):
Slave address:0x20 = 32
Baud rate:0x2580 = 9600
The response data fromslave:
Q1: What Is Your Product Warranty?
A: We Guarantee Our Product Is Fit For Its Normal User Purposes And Is Free From Defects In Materials Or Workmanship.
Q2: What Is Your Company Policy On Defective Goods?
A: Our Company Keep Items Quality For A Long Time. If There Are Any Defective Goods Due To
Production Defects Or Transportation Problem, Please Contact Us. Our Customer Service Team Will Provide Immediate Response To
Complaints. We Will Try Our Best To Give You A Good Resolve Way.
Q3: What Is Your MOQ (minimum Order Quantity)?
A: Generally Our Moq Is No Limited. Please Have More Discussion With Us If Your Combination Of Models Is Complicated.
Q4:how About Getting Samples From You?
A: We Will Send You The Samples After We Receive The Payment For Samples. The Buyer Shall Afford The Shipping Cost. Please Have A
Confirm With Us Which Shipping Way Do You Want.
Q5:about The Shipment: What Type Of Shipment Will You Use?
A: We Usually Ship The Products By Express(delivery It To Your Door) Or By Air Freight To Your Nearest Airport, Shipping Days:3-7
Working Days Depend On Destination;if The Order Quantity Is Large, We May Ship By Sea Container And The Best Ship Way Is By Sea,
Shipping Days: Over 20 Working Days Depend On Destination Port.
Q6:what Packing Do You Use?
A: Neutral Package With Airbag Or Customized Package.
Q7:how Much Are The Shipping Cost?
A:shipping Cost Is Charged By The Package's Weight And Related To The Shipping Methods You Choose And Your Destination.
Q8:how To Order?
Step1.Click (Add to Cart) Buy Directly On The Product Page, Or Add To Shopping Cart And Settle Together, Pay With Paypal,
Need your information, such as full name,country, city, detail address, post code, tax number ...
Step2. We Will Delivery by EMS POST, FedEx or DHL Within
3-5 Working Days After Payment Confirmed.
Setp3. Confirm Us Receipt of Products.
