UbiBot UB-LTH-N1 Wifi Temperature Sensor

Product Introduction

The temperature sensor consists of a high-precision thermistor and a transmitter that accurately measures the temperature over the entire range. The humidity sensor is based on the dielectric constant measurement principle, which simulates the shape of the blade and the characteristics of the blade surface. Humidity can be measured accurately by the change of dielectric constant on the blade surface. With good sensitivity, it can detect trace moisture residues on the leaf surface. The leaf surface temperature and humidity transmitter adopts waterproof design, low power consumption, and can be continuously monitored for a long time.

Use Case Scenarios

The sensor is suitable for measuring humidity on the surface of plants or objects in greenhouses, laboratories and artificial climate chambers.

Features

1. Mimics the characteristics of leaf surfaces for fast and accurate temperature and humidity measurements.
2. Denser leaf vein pattern (15 lines/cm) allows detection of smaller droplets for more sensitive measurements.
3. Epoxy resin encapsulation, waterproof and moisture-proof, longer life.

Product Specifications

Specifications
Model	UB-LTH-N1
Power Supply	DC 4.5~30V
Max Current	95mA（@5V）
Measuring Range	Temperature: -40~80℃ Humidity: 0~100%
Accuracy	Temperature: ±0.5℃ (@25℃) Humidity: ±3% (@0~50%)
Resolution	Temperature: 0.1℃ Humidity: 0.1%RH
Dimension	65*15*138.5mm
Protection level	IP67
Connector	Audio
Cable Length	3m
Communication Protocol	RS485 Modbus RTU Protocol
RS485 Address	0xCF
Baud Rate	1200 bit/s,2400 bit/s, 4800 bit/s, 9600 bit/s (default), 19200 bit/s

Wiring Instruction

Communication protocols

Communication basic parameters

Communication Basic Parameter
Coding System	8–bit binary
Data Bit	8 bits
Parity Checking Bit	none
Stop Bit	1 bit
Error Checking	CRC Check
Baud Rate	1200 bit/s, 2400 bit/s, 4800 bit/s, 9600 bit/s (default), 19200 bit/s

Data Frame Format
The Modbus-RTU communication protocol is used in the following format:

• Initial structure ≥ 4 bytes in time.
• Address code: 1 byte, default 0xCF.
• Function code: 1 byte, support function code 0x03 (read only) and 0x06 (read/write).
• Data area: N bytes, 16-bit data, high byte comes first.
• Error check: 16-bit CRC code.
• End structure ≥ 4 bytes of time.

Request

Slave Address

Function Code

Register Address

No. of Registers

CRC LSB

CRC MSB

1 byte

1 byte

2 bytes

2 bytes

1 byte

1 byte

Response

Slave Address

Function Code

No. of Bytes

Content 1

Content 1

…

Content n

CRC

1 byte

1 byte

1 byte

2 bytes

2 bytes

…

2 bytes

2 bytes

Register Address

Register Address
Address	Content	Register Length	Function Code	Description of definitions
0x0000	Humidity	1	03	Unsigned integer data, divided by 10
0x0001	Temperature	1	03	Signed integer data, divided by 10
0x07D0	Address	1	03/06	1～255
0x07D1	Baud Rate	1	03/06	0:2400, 1:4800, 2:9600

www.ubibot.com

Frequently Asked Questions 

Q: What is the suitable application scenario for this sensor?

A: The sensor is suitable for measuring humidity on the surface of plants or objects in greenhouses, laboratories, and artificial climate chambers.

Q: What is the communication protocol used by the sensor?

A: The sensor uses RS485 Modbus RTU Protocol for communication.

Q: How do I set the baud rate for communication with the sensor?

A: You can set the baud rate to one of the following options: 1200 bit/s, 2400 bit/s, 4800 bit/s, 9600 bit/s (default), or 19200 bit/s.

Documents / Resources

	UbiBot UB-LTH-N1 Wifi Temperature Sensor [pdf] User Guide WS1, WS1 Pro, UB-LTH-N1, UB-LTH-N1 Wifi Temperature Sensor, UB-LTH-N1, Wifi Temperature Sensor, Temperature Sensor, Sensor
	UBIBOT UB-LTH-N1 Wifi Temperature Sensor [pdf] User Guide UB-LTH-N1 Wifi Temperature Sensor, UB-LTH-N1, Wifi Temperature Sensor, Temperature Sensor, Sensor

References

• User Manual