A greenhouse is a closed environment that provides optimal conditions for plant growth and promotes plant growth by controlling indoor and outdoor environments. A complete
Modbus rtu temperature humidity sensor
RS-WS-N01-8 is a smart rs485 temperature sensor. The housing of the Modbus temperature sensor is made of abs plastic with vents, and there is a slot on the back, which can be directly installed on the rail. RS-WS-N01-8 sensor adopts standard Modbus-RTU communication protocol, supports Kingview, 3D force control, MCGS Kunlun configuration software configuration screen, PLC, user-developed platform.
- Model: RS-WS-N01-8
- MOQ: 1 PCS
- Delivery date: within 24 hours
- Price: $7.5
About - Modbus rtu temperature sensor
RS-WS-N01-8 is a popular Modbus RTU temperature sensor produced by our company. We are an OEM manufacturer with more than 15 years of experience. Under the same quality conditions, our wholesale price can save 40% of your budget. We can also provide customized services according to customer needs and support customers’ secondary development. Free technical support, free cloud platform to achieve real-time remote monitoring. Use in a normal environment to provide 2 years warranty, in stock, can be shipped immediately. Inquiry us now!
Power supply (default): 5-30V DC
Power consumption: 0.3W
Humidity: ±2%RH (5%~95%RH, 25℃), temperature: ±0.4℃ (25℃)
(Default) Humidity: ±3%RH (5%RH~95%RH, 25°C), temperature: ±0.5°C (25°C)
Transmitter circuit working temperature: -40℃~+60℃, 0%RH~80%RH
Communication protocol: Modbus-RTU communication protocol
Output signal: 485 signal
Temperature display resolution: 0.1℃
Humidity display resolution: 0.1%RH
Temperature and humidity refresh time: 1S
Long-term stability: temperature ≤0.1℃/y humidity ≤1%RH/y
Response time: Temperature ≤15s (1m/s wind speed) Humidity ≤4s (1m/s wind speed)
Parameter setting: through software setting
Popular RS-WS-N01-8 video
RS-WS-N01-8 is a temperature and humidy sensor using RS485 Modbus RTU communication. This video shows how to configure the communication settings on the device and how to read information in OpenHAB and Node Red.
Communication protocol - RS-WS-N01-8
1. Basic communication parameters
|Code||8 bit binary system|
|Data Bit||8 bit|
|Odd-even Revi-sion Bit||None|
|Incorrect Revis-ion||CRC(Redundant cyclic codes)|
|Baud Rate||2400bit/s, 4800bit/s, 9600 bit/s options, the factory default 4800bit/s|
2. Data frame format definition
Using Modbus-RTU communication protocol, the format is as follows:
Initial structure ≥4 bytes of time
Address code = 1 byte
Function code = 1 byte
Data area = N bytes
Error check = 16-bit CRC code
Time to end structure ≥ 4 bytes
Address code: the address of the transmitter, which is unique in the communication network (factory default 0x01).
Function code: the function instruction of the command sent by the host, this transmitter only uses the function code 0x03 (read register data).
Data area: The data area is the specific communication data, pay attention to the high byte of the 16bits data first!
CRC code: two-byte check code.
Host query frame structure:
|Address Code||Function Code||Register Origin Address||Register Length||Revision Code in Low Position||Revision Code in High Position|
Slave response frame structure:
|Address Code||Function Code||Effectiveness Byte NO.||Data Area One||Data Area Two||Data Area N||Revision Code|
3. Register address
|Register Address||PLC or Configuration Address||Content||Operation|
|0000 H||40001||Humidity||Read only|
|0001 H||40002||Temperature||Read only|
4. Communication protocol example and explanation
Example: read the temperature and humidity value of device address 0x01
Query frame (hexadecimal):
|Address Code||Function Code||Origin Address||Data Length||Revision Code in Low Position||Revision Code in High Position|
|0x01||0x03||0x00 0x00||0x00 0x02||0xC4||0x0B|
Response frame (hexadecimal): (For example, the temperature is -10.1℃ and the humidity is 65.8%RH)
|Address Code||Function Code||Return Byte Number||Humidity Number||Temperature Number||Revision Code in Low Position||Revision Code in High Position|
|0x01||0x03||0x04||0x02 0x92||0xFF 0x9B||0x5A||0x3D|
When the temperature is lower than 0 ℃, the temperature data is uploaded in the form of complement code.
Temperature: FF9B H(hex) = -101 => temperature = -10.1℃
Humidity: 292 H (Hex) = 658 => Humidity = 65.8%RH
Features - RS-WS-N01-8
Modbus temperature sensor features
1. The sensor adopts an integrated design with a built-in temperature and humidity measuring element, and the overall appearance is small and exquisite, which is suitable for installation in a small place to measure temperature and humidity.
2. The Modbus RTU temperature humidity sensor has pluggable wiring terminals, easy to install, and easy to maintain during use.
3. High-quality measurement unit imported from Switzerland, accurate measurement.
4. 10~30V wide voltage range power supply, complete specifications.
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