Description: Product Introduction: The product adopts industrial grade chip, high-precision imported SHT20 temperature and humidity sensor to ensure the excellent reliability, high precision and interchangeability of the product. Using RS485 hardware interface (with lightning protection design), the protocol layer is compatible with standard industrial Modbus-Rtu protocol. This product integrates the MODBUS protocol and the common protocol. The user can choose the communication protocol. The common protocol has an automatic upload function (connecting RS485 through the serial port adjustment tool will automatically output temperature and humidity). Product parameters: Product name: temperature and humidity transmitter DC power supply: DC 5V-30V Output signal: RS485 signal Temperature accuracy: ±0.5℃ (25℃) Humidity accuracy: ±3%RH Temperature range: 0%RH-80%RJ Temperature resolution: 0.1℃ Humidity resolution: 0.1%RH Equipment power consumption: ≤0.2W Communication address: 1-247 can be set, default 1 Communication protocol: Modbus-RTU protocol and custom common protocol Baud rate: configurable, default 9600, 8-bit data, 1-bit stop, no parity Wiring: Modbus protocol: 0x03:Read keep register 0x04: Read input register 0x06:Write a single keep register 0x10:Write more keep registers Modbus Frame format: Master send format: The responseformat of slave: MODBUSCOMMAND Master read temperature command frame(0x04): The response data from slave: Temperature value=0x131,converted to a decimal 305,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 °; Master read humidity command frame(0x04) The response data from slave: 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 from slave: Read keep register(0x03): Readdevice address from the slave: The response data from slave: Modify the contents of the registers(0x06): Modify the slave address register: Modify the slave address:0x08 = 8 The response data from slave(And send the same): Continuously change keep registers(0x10): Slave address :0x20 = 32 Baud rate :0x2580 = 9600 The response data from slave: General Protocal The default baud rates9600 (the user can set), 8 bits of data, one stop, no check RS485 CMD instructions READ Report triggered a temperature and humidity (27.4°,67.7% 温度27.4°湿度67.7%) 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) TC:XX.X Set the temperature calibration(-10.0~10.0) (TC:02.0温度修正值为2.0°) HC:XX.X Set the humidityration(-10.0~10.0) (HC:-05.1 湿度修正值为 -5.1%) HZ:XXX Set the temperature and humidity reporting rate(0.5,1,2,5,10) (HZ:2 reporting rate 2Hz) PARAM Read the system current Settings PARAM CMD: TC:0.0,HC:0.0,BR:9600,HZ:1 ->Temp calibration 0.0, Humi calibration0.0, Baud rate 9600,report rate 1Hz SLAVE_ADD:1 ->MODBU Slave address 1 On Nov 23, 2023 at 08:32:45 PST, seller added the following information:
Price: 32.42 USD
Location: shenzhen
End Time: 2025-01-23T10:01:37.000Z
Shipping Cost: 2.99 USD
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Item Specifics
Restocking Fee: No
Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Brand: Unbranded
MPN: 1
