UBIBOT UB-NH3-I1 Wifi Temperature Sensor User Guide

UB-NH3-I1 Wifi Temperature Sensor

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Product Specifications

• Model: UB-NH3-I1
• Power Supply: DC 10~30V
• Max Current: 834mA @12V
• Measuring Range: 0~500ppm
• Resolution: 1ppm
• Accuracy: –
• Working Environment: –
• Connector: RS485
• Dimensions: 110*85*44mm
• Cable Length: 3m
• Communication Protocol: RS485 Modbus RTU
  Protocol
• RS485 Address: 0xC8
• Baud Rate: 1200 bit/s, 2400 bit/s, 4800 bit/s,
  9600 bit/s (default), 19200 bit/s

Product Usage Instructions

Wiring Instruction

Communication protocols:

1. Communication basic parameters:

• Coding System
• Data Bit
• Parity Checking Bit
• Stop Bit
• Error Checking
• 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 0xC8.
• 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

Response:

• Slave Address
• Function Code
• No. of Bytes
• Content 1 – Content n
• CRC (2 bytes)

Register Address:

• Address 0x0000/0002 – Content: Ammonia Value
• Baud Rate – Register Address – Register Length – Function
  Code
Data: Integer data 1255 Baud Rates: 0:2400, 1:4800, 2:9600,
3:19200, 4:38400, 5:57600, 6:115200, 7:1200

Note on Usage:

1. Do not install the equipment in a strong convection air
   environment.
2. Avoid contact with organic solvents, paints, chemicals, oils,
   and highly concentrated gases.
3. Avoid long-term use in environments containing corrosive
   gases.
4. Avoid long-term storage in high concentrations of organic or
   alkaline gases.
5. Avoid direct exposure to strong sunlight and high
   temperatures.

Frequently Asked Questions (FAQ)

Q: What is the maximum current consumption of the sensor?

A: The maximum current consumption is 834mA at 12V.

Q: What is the default baud rate of the communication
protocol?

A: The default baud rate is 9600 bit/s.

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Product Introduction
This sensor uses the MODBUS-RTU protocol, allowing the host computer to monitor data through RS485 communication. When paired with the UbiBot device, it enables remote measurement and online monitoring on a computer platform or mobile app. It features high accuracy, good linearity, wide compatibility, ease of installation, and long transmission distance.

Use Case Scenarios Widely used in factories, chemical industry, fertiliser, pharmaceuticals and other real-time monitoring of ammonia.

Features 1. High performance imported bearings, low rotation resistance, accurate measurement. 2. Stronger stability and anti-interference ability. 3. Standard audio interface design, plug and play. 4. Wide voltage input, DC10-30V.

Product Specifications
Model Power Supply Max Current Measuring Range
Resolution Accuracy Working Environment Connector Dimensions Cable Length Communication Protocol RS485 Address Baud Rate

Specifications UB-NH3-I1 DC 10~30V
834mA@12V 0~500ppm 1ppm
±5%FS@100ppm2550%RH18%VOL -20~50 Audio
110*85*44mm 3m
RS485 Modbus RTU Protocol 0xC8
1200 bit/s,2400 bit/s, 4800 bit/s, 9600 bit/s (default), 19200 bit/s

Wiring Instruction

Communication protocols 1. Communication basic parameters

Coding System Data Bit
Parity Checking Bit Stop Bit
Error Checking Baud Rate

Communication Basic Parameter 8­bit binary 8 bits none 1 bit CRC Check
1200 bit/s, 2400 bit/s, 4800 bit/s, 9600 bit/s (default), 19200 bit/s

2. 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 0xC8.

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

3. Register Address

Address 0x0000/0002
0x07D0
0x07D1

Content Ammonia Value
Address
Baud Rate

Register Address

Register Length Function Code

1

03

1

03/06

1

03/06

Description of definitions Integer data 1255
0:2400, 1:4800, 2:9600, 3:19200, 4:38400 5:57600, 6:115200, 7:1200

NOTE 1. Do not install the equipment for use in a strong convection air environment. 2. The equipment should avoid contact with organic solvents (including silicone and other adhesives),
paints, chemicals, oils and highly concentrated gases. 3. The device should not be used for a long time in an environment containing corrosive gases, which
can damage the sensor. 4. Do not place the device for a long time in a high concentration of organic gases, long-term
placement will lead to sensor zero point drift, slow recovery. 5. Prohibit long time storage and use in high concentration of alkaline gas, avoid strong sunlight
direct exposure to the sensor and lead to high temperature.

Documents / Resources

UBIBOT UB-NH3-I1 Wifi Temperature Sensor [pdf] User Guide WS1, WS1 Pro, UB-NH3-I1, UB-NH3-I1 Wifi Temperature Sensor, UB-NH3-I1, Wifi Temperature Sensor, Temperature Sensor, Sensor

References

• User Manual