Klha Kz21c30 Wireless Zigbee Soil Sensor User Manual

KLHA KZ21C30 Wireless zigbee soil sensor

INTRODUCTION

KZ21C30 uses the standard LORA Wireless Communication Interface, and easy access to PLC， DCS and other instruments or systems for monitoring soil Moisture,soil temperature state quantities.The internal use of high-precision sensing core and related devices to ensure high reliability and excellent long-term stability can be customized RS232, RS485, CAN,4-20mA, DC0~5V\10V, ZIGBEE,Lora, WIFI, GPRS and other output methods.

Technical Parameters

Wiring instructions

Any incorrect wiring can cause irreversible damage to the product. Please carefully wire the cable as follows in the case of power failure, and then connect the cable to confirm the correctness and then use it again.

In the case of broken wires, wire the wires as shown in the figure. If the product itself has no leads, the core color is for reference.

Communication Protocol

Because the device only has LORA wireless communication mode, the user can read and modify the parameters involved in this communication protocol through the wireless transparent transmission of the LORA transparent transmission module. The product uses the MODBUS-RTU standard protocol format, All operation or reply commands are hexadecimal data. The default device address is 1 when the device is shipped from the factory. The default baud rate is 9600, 8, n, 1. Since the LORA sensor cannot directly modify the LORA parameters, it is generally based on the standard parameters (434MHz). The carrier frequency, that is, channel 24) is shipped. If other parameters such as channel, signal bandwidth, and spreading factor are required, please specify when ordering.
Read Data (Function id 0x03)

For the correct query frame, the devi ce will respond with data:01 03 06 00 7B 00 00 00 00 C5 7F , the response format is parsed as follows:

Data Address Table

Lora has a total of 32 channels. When the device is concentrated, you can change the channel to prevent signal crosstalk. The default channel value is 24, which corresponds to 434MHz. The device generates from 410MHz to 441MHz every 1MHz. For example, if the current channel value is 24, the actual frequency of use is: 410+24=434MHz. Device transmit power is divided into 4 files, 0 pairs are 20db, 1 pair is 17db, 2 pairs are 14db, 3 pairs are 11db, because the actual transmit power is related to many factors, so here is the maximum transmit power. Signal bandwidth is divided into 10 files,read-only, default 07, ie 125KHz, 0-9 are: 7.8KHz, 10.4KHz, 15.6KHz, 20.8KHz, 31.2KHz, 41.7KHz, 62.5KHz, 125KHz, 250KHz ,500KHz.  The spreading factor value range is 0 to 6,read-onlyZ, the default is 02, ie SFactor=8, 0-6 corresponds to the spreading factor SFactor: 6, 7, 8, 9, 10, 11, 12, respectively.

Read and modify device address

Read or query device address
If you don’t know the c urrent device address and there is only one device on the bus, you can use the command FA 03 00 64 00 02 90 5F Query device address.

FA is 250 for the general address. When you don’t know the address, you can use 250 to get the real device address, 00 64 is the device model register. For the correct query command, the device will respond, for example the response data is: 01 03 02 07 12 3A 79, the format of which is as shown in the following table:

Change device address
For example, if the current device address is 1, we want to change to 02, the command is:01 06 00 66 00 02 E8 14 .

Read and Modify Baud Rate

Read baud rate
The device default factory baud rate is 9600. If you need to change it, you can change it according to the following table and the corresponding communication protocol . For example, read the current device’s baud rate ID, the command is:01 03 00 67 00 01 35 D5 , its format is parsed as follows. Read the baud rate encoding of the current devic e. Baud rate encoding: 1 is 2400; 2 is 4800; 3 is 9600; 4 is 19200; 5 is 38400; 6 is 115200.
For the correct query command, the device will respond, for example the response data is: 01 03 02 00 03 F8 45, the format of which is as shown in the followin g table:

Change the baud rate
For example, changing the baud rate from 9600 to 38400 , ie changing the code from 3 to 5, the command is: 01 06 00 67 00 05 F8 1601 03 00 66 00 01 64 15 .

Read Correction Value

Read Correction Value
When there is an error between the data and the reference standard, we can reduce the display error by adjusting the correction value. The correction difference can be modified to be plus or minus 1000, t hat is, the value range is 0 1000 or 64535 65535. For example, when the display value is too small, we can correct it by adding 100. The command is: 01 03 00 6B 00 01 F5 D6 . In the command 100 is hex 0x64 If you need to reduce, you can set a negative val ue, such as 100, corresponding to the hexadecimal value of FF 9C, which is calculated as 100 65535=65435, and then converted to hexadecimal to 0x FF 9C. The correction value starts from 00 6B. We take the first parameter as an example. The correction valu e is read and modified in the same way for multiple parameters.

For the correct query command, the device will respond, for example the response data is: 01 03 02 00 64 B9 AF, the format of which is as shown in the following table:

Change correction value
Fo r example, the current state quantity is too small, we want to add 1 to its true value, and the current value plus 100 correction operation command is:01 06 00 6B 00 64 F9 FD .

Disclaimer

This document provides all information about the product, does not grant any license to intellectual property, does not express or imply, and prohibits any other means of granting any intellectual property rights, such as the statement of sales terms and conditions of this product, other issues. No liability is assumed. Furthermore, our company makes no warranties, express or implied, regarding the sale and useof this product, including the suitability for the specific use of the product, the marketability or the infringement liability for any patent, copyright or other intel lectual property rights, etc. Product specifications and product descriptions may be modified at any time without notice.

Contact Us

• Company: Shanghai Sonbest Industrial Co., Ltd KLHA Brand Division Address: Building 8,No.215 North east road, Baoshan District, Shanghai,China
• Web: http://www.klha.com
• Web: http://www.klha.com
• SKYPE: soobuu
• Email: [email protected]
• Tel: 86 021 51083595 / 66862055 / 66862075 / 66861077

References

• Home-KLHA快乐海岸物联网
• Home-KLHA快乐海岸物联网