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: $10

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!

RS485 temperature and humidity sensor
modbus rtu temperature sensor size

Power supply (default): 10-30V DC
Power consumption: 0.3W
A precision:
Humidity: ±2%RH (5%~95%RH, 25℃), temperature: ±0.4℃ (25℃)
B quasi-accuracy:
(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 Bit8 bit
Odd-even Revi-sion BitNone
Stop Bit1bit
Incorrect Revis-ionCRC(Redundant cyclic codes)
Baud Rate2400bit/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 CodeFunction CodeRegister Origin AddressRegister LengthRevision Code in Low PositionRevision Code in High Position
1byte1byte2bytes2bytes1byte1byte

Slave response frame structure:

Address CodeFunction CodeEffectiveness Byte NO.Data Area OneData Area TwoData Area NRevision Code
1byte1byte1byte2bytes2bytes2bytes2bytes

3. Register address

Register AddressPLC or Configuration AddressContentOperation
0000 H40001HumidityRead only
0001 H40002TemperatureRead only

4. Communication protocol example and explanation

Example: read the temperature and humidity value of device address 0x01

Query frame (hexadecimal):

Address CodeFunction CodeOrigin AddressData LengthRevision Code in Low PositionRevision Code in High Position
0x010x030x00 0x000x00 0x020xC40x0B

Response frame (hexadecimal): (For example, the temperature is -10.1℃ and the humidity is 65.8%RH)

Address CodeFunction CodeReturn Byte NumberHumidity NumberTemperature NumberRevision Code in Low PositionRevision Code in High Position
0x010x030x040x02 0x920xFF 0x9B0x5A0x3D

Temperature calculation:
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 calculation:
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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