JXCT JXBS-3001-TR-RS User manual

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RS485 Modbus
JXBS-3001-TR-RS Soil Temperature Moisture Sensor User Manual
JXBS-3001-TR-RS
Soil Temperature Moisture Sensor
User Manual
RS485 Modubus
Version: 2.0
Date: 2020-1-1
Status: Released
www.jxct-iot.com

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JXBS-3001-TR-RS Soil Temperature Moisture Sensor User Manual
I. BRIEF INTRODUCTION
1.1 Product Overview
The soil moisture temperature sensor is suitable for soil temperature and moisture
measurement. Compared with the German original high-precision sensor and the
actual soil drying and weighing method, the soil moisture temperature sensor has high
accuracy, fast response and stable output. Less affected by soil salt content, suitable
for all kinds of soil. Can be buried in soil for a long time, resistant to long-term
electrolysis, corrosion resistance, vacuum potting, completely waterproof.
1.2Measurement and Hardware Parameters
Parameters
Specs
Power Supply
12-24V DC
Communication Protocol
RS485 Modbus
Temperature Range
-40℃~80℃
Temperature Accuracy
±0.5℃
Moisture Accuracy
±3% @ 0-53%RH
±5% @ 53-100%RH
Response Time
<1s
Power Consumption
≤0.15W (@12V DC , 25℃)
Protection Level
IP68
Working Pressure
0.9-1.1atm

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JXBS-3001-TR-RS Soil Temperature Moisture Sensor User Manual
1.3 System frame Diagram
FIGURE 1 SINGLE-ENDED

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JXBS-3001-TR-RS Soil Temperature Moisture Sensor User Manual
FIGURE 2 MUTIPLE-ENDED
II. HARDWARE CONNECTIONS
2.1 CHECKING BEFORE INSTALLATION
Check the list of devices before installation:
TABLE 1 List of Devices
2.2 Interface Description
Before you wiring and use, please read this article in detail, Improper use may result
in irreversible damage to the product.
TABLE 2 Wiring Sequence
Name
Number
THE SENSOR DEVICE
1
12V POWER ADAPTER（Optional）
1
WARRANTY CARD / CERTIFICATE
1
THE USB TO 485 DEVICE（Optional）
1

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RS485 Modbus
JXBS-3001-TR-RS Soil Temperature Moisture Sensor User Manual
Function
Cable Color
Specs
Power
Brown
Power supply +
Black
Power supply -
Communication
Yellow (grey)
485-A
Blue
485-B
We provide default cable length of 1.5 meters, you can extend the cable yourself
according to your needs.
2.3 Speed measurement method
Select a suitable measurement site, avoid the stones, ensure that the steel needle
does not hit a hard object, throw the topsoil at the required depth of measurement,
keep the underlying soil tight, grip the sensor vertically into the soil, insert It is not
allowed to shake right and left. It is recommended to measure multiple times within a
small range of a measurement point to obtain the average value.
2.4 Buried method
Dig a pit with a diameter of >20 cm vertically and insert the sensor steel needle
horizontally into the pit wall at a given depth. After the pit is buried tightly and stable
for a period of time, measurement and recording can be performed for days, months,
or even longer.
2.5 Precautions
1. Steel needle must be fully inserted into the soil.
2. Avoid direct sunlight on the sensor and cause excessive temperature. Use caution
in the field against lightning strikes.
3. Do not violently bend the steel needle, do not force pull the sensor leads, do not
beat or violently hit the sensor.
4. The sensor protection grade IP68, the sensor can be soaked in water.
5. Due to the presence of radio frequency electromagnetic radiation in the air, it
should not be in a state of power in the air for a long time.

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JXBS-3001-TR-RS Soil Temperature Moisture Sensor User Manual
III. CONFIGURATION TOOL
INSTALLATION AND USE
We provide CONFIGURATION TOOL , which can be easily used to test our sensor
device.
3.1 Sensor Access Computer
Transmitter can be connected to PC with the RS485 to USB adapter. You can check
the COM port number through Device Manager (right click My Computer).
3.2 How To Use Configuration Tool
Please note that this software can only test one device at the same time. After
connecting the physical device, click the CONNECT button to read the information. In
the UNCONNET state, you can modify BAUD and ADDR in COMMUNICATION
SETTINGS.
Under the software, different check boxes can be selected according to different
situations. For example, you can choose the GAS option to test the RS485 OXYGEN
SENSOR , you can choose the NORMAL option to test the RS485 TEMPERATURE
AND HUMIDITY SENSOR .

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JXBS-3001-TR-RS Soil Temperature Moisture Sensor User Manual
IV. COMMUNICATION PROTOCOL
4.1 Communication Basic Parameters
TABLE 3 Communication Basic Parameters
PARAMETERS
CONTENT
Protocol
Modbus RTU
Data bits
8 bit
Parity bit
No
Stop bit
1 bit
Error checking
CRC (redundant loop code)
Baud rate
2400 bps/ 4800 bps/ 9600 bps can be set
factory defaults to 9600 bps
For more information about MODBUS RTU please visit the "www.modbus.org ".
4.2 Register Address
TABLE 4 Register Address
Register
Address
Plc Configuration
Address
Content
Operation
0002H
40003
Soil humidity(unit 0.1%RH)
Read-Only
0003H
40004
Soil temperature(unit 0.1℃)
Read-Only
0100H
40101
Device Address (0-252)
Read/Write
0101H
40102
Baud Rate (2400/4800/9600)
Read/Write

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4.3 Communication Example
4.3.1 Read Device Address 0x01's Soil Temperature &Humidity
Answer Frames
Address
Code
Function
Code
Number Of
Valid Bytes
Humidity
Value
Temperature
Value
CRC_L
CRC_H
0x01
0x03
0x04
0x02 0x92
0xFF 0x9B
0x5A
0x3D
Soil temperature：
FF9BH ( hexadecimal ) =-101=> temperature =-10.1℃
Soil humidity:
292H( hexadecimal ) =658=>humidity =65.8%RH
4.3.2 Read Device Address 0x01's Soil Humidity Value
Answer Frame
Address Code
Function code
Number Of Bytes
Humidity Value
CRC_L
CRC_H
0x01
0x03
0x02
0x00 0x4A
0x39
0xB3
Soil humidity:
4AH( hexadecimal ) =74=>humidity =7.4%RH
Inquiry Frame
Address Code
Function Code
Start Address
Data Length
CRC_L
CRC_H
0x01
0x03
0x00 0x02
0x00 0x02
0x65
0xCB
Inquiry Frame
Address Code
Function Code
Start Address
Data Length
CRC_L
CRC_H
0x01
0x03
0x00 0x02
0x00 0x01
0X25
0xCA