netvox R72632A User manual

R72632A
Wireless Soil Nitrogen / Phosphorus / Potassium Sensor
Wireless Soil NPK Sensor
R72632A
User Manual
Copyright©Netvox Technology Co., Ltd.
This document contains proprietary technical information which is the property of NETVOX Technology. It shall be maintained in
strict confidence and shall not be disclosed to other parties, in whole or in part, without written permission of NETVOX
Technology. The specifications are subject to change without prior notice.

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Table of Content
1.Introduction.................................................................................................2
2.Appearance..................................................................................................3
3. Main Features.............................................................................................3
4. Set up Instruction.......................................................................................4
5. Data Report ................................................................................................5
5.1 Example of ReportDataCmd ..............................................................5
5.2 Example of ConfigureCmd.................................................................6
6. Installation..................................................................................................7
7. Important Maintenance Instruction............................................................8

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1. Introduction
R72632A is a netvox Class Atype device based on LoRaWAN open protocol, which is compatible with LoRaWAN protocol.
R72632A can be externally connected with NPK (485 type) soil sensor to report the soil nitrogen, phosphorus and potassium
content collected by the sensor to the corresponding gateway.
The external sensor of R72632A has high precision, fast response and stable output, it is less affected by the salt content of soil
and is suitable for all kinds of soil. It can be buried in the soil for a long time. It is resistant to long-term electrolysis, corrosion,
vacuuming and potting. It is completely waterproof, which greatly facilitates the customer's systematic evaluation of soil
conditions
LoRa Wireless Technology:
LoRa is a wireless communication technology dedicated to long distance and low power consumption. Compared with other
communication methods, LoRa spread spectrum modulation method greatly increases to expand the communication distance.
Widely used in long-distance, low-data wireless communications. For example, automatic meter reading, building automation
equipment, wireless security systems, industrial monitoring. Main features include small size, low power consumption,
transmission distance, anti-interference ability and so on.
LoRaWAN:
LoRaWAN uses LoRa technology to define end-to-end standard specifications to ensure interoperability between devices and
gateways from different manufacturers.

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2. Appearance
3. Main Features
Apply SX1276 wireless communication module
2 ER34615 lithium batteries, total battery capacity is 19000mAh
Detect the content of nitrogen, phosphorus and potassium in soil
Protection Class: Main body-IP65, NPK Sensor IP68
Compatible with LoRaWANTM Class A
Frequency hopping spread spectrum
Configuration parameters can be configured via a third-party software platform, data can be read and alerts can be set via SMS
text and email (optional)
Applicable to third-party platforms: Actility / ThingPark, TTN, MyDevices/Cayenne
Low power consumption and long battery life
Note:
Battery life is determined by the sensor reporting frequency and other variables,
please refer to http://www.netvox.com.tw/electric/electric_calc.html
On this website, users can find battery lifetime for varied models at different configurations.
Indicator
Function Key
NPK Sensor Battery pack

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4. Set up Instruction
On/Off
Power On Connect to battery pack
Turn On Connect the battery pack directly to boot
Turn Off (Restore to factory setting) Press and hold the function key for 5 seconds and the green indicator flashes 20 times.
Power Off Remove battery pack
Network Joining
Never Join the Network
Turn on the device to search the network.
The green indicator stays on for 5 seconds: success
The green indicator remains off: fail
Had joined the network
Turn on the device to search the previous network.
The green indicator stays on for 5 seconds: success
The green indicator remains off: fail
Fail to join the network Suggest to check the device verification information on the gateway or consult you
r platform
server provider.
Function Key
Press and hold for 5 seconds
Restore to factory setting / Turn off
The green indicator flashes 20 times: success
The green indicator remains off: fail
Press once
The device is in the network: green indicator flashes once and sends a report
The device is not in the network: green indicator remains off
Sleeping Mode
The device turns on and joins in the
network
Sleeping period: Min Interval
When the reportchange exceeds setting value or the state changes, send a data report
according to Min Interval
The device turns on but fail to join
the network
Note:
1. It is recommended to remove the battery when the device is not in use.
2. It is recommended to check the device registration information on the gateway.
Low Voltage Threshold Alarm
Low Voltage 6.8 V

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5. Data Report
After the device is powered on and connected to the network, a version package will be sent immediately. After the collection of
the preheating sensor is completed (about 20s), a report data containing the current battery power and soil nitrogen, phosphorus
and potassium content will be reported immediately.
Default setting:
Report MaxTime: 3600s (The MaxTime should be ≥60 seconds.)
Report MinTime: The R72632A device does not support the ReportChange function
(That is, the configuration of ReportMinTime is invalid), and the report data string sent is always sent according to the
ReportMaxTime cycle.
The data reported by the R72632A:
Soil nitrogen content (N), soil phosphorus content (P) and soil potassium content (K).
Detection range of soil NPK: 0 to 1999 mg/kg, unit: 1mg / kg
Note
1. Before any configuration, the device sends data according to the default configuration.
2. The data transmission cycle of the device is subject to the burning configuration, and there is no minimum time. The
value of ReportMaxTime should be greater than or equal to 60 seconds.
3. In order to make the NPK soil sensor work stably, it is required to send the report data information 20 seconds after the
power on and network.
4. After briefly pressing the key, the device needs a period of time to warm up and process the sensor information. Please
wait patiently.
The device reported data parsing please refer to Netvox LoRaWAN Application Command document and Netvox Lora
Command Resolver http://loraresolver.netvoxcloud.com:8888/page/index
5.1 Example of ReportDataCmd
FPort：0x06
Bytes
1
1
1
Var(Fix=8 Bytes)
Version
DeviceType
ReportType
NetvoxPayLoadData
Version– 1 byte –0x01——the Version of NetvoxLoRaWAN Application Command Version
DeviceType– 1 byte – Device Type of Device
The devicetype is listed in Netvox LoRaWAN Application Devicetype doc
ReportType – 1 byte –the presentation of the NetvoxPayLoadData，according the devicetype
NetvoxPayLoadData– Fixed bytes (Fixed =8bytes)

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Device Device
Type Report Type NetvoxPayLoadData
R72632A 0x09 0x0F Battery
(1Byte, Unit:0.1V) Nitrogen (2Bytes,Unit:1mg/kg) Phosphorus (2Bytes,Unit:1mg/kg) Potassium (2Bytes,Unit:1mg/kg) Reserved (1Byte,Fixed 0x00)
Uplink: 01090f450014001c004100
Byte
Value
Attribute
Result
Resolution
1st
01
Version
01
-
2nd
09
DeviceType
09
-
3rd
0F
ReportType
0F
-
4th
45
Battery
6.9v
45(HEX)=69(DEC),69*0.1v=6.9v
5th~6th
0014
Nitrogen(N)
20mg/kg
0014(HEX)=20(DEC),20*1mg/kg=20mg/kg
7th~8th
001C
Phosphorus(P)
28mg/kg
001C(HEX)=28(DEC),28*1mg/kg=28mg/kg
9th~10th
0041
Potassium(K)
65mg/kg
0041(HEX)=65(DEC),65*1mg/kg=65mg/kg
11th
00
Reserved
-
5.2 Example of ConfigureCmd
FPort：0x07
Bytes
1
1
Var (Fix =9 Bytes)
CmdID
DeviceType
NetvoxPayLoadData
CmdID– 1 byte
DeviceType– 1 byte – Device Type of Device
NetvoxPayLoadData– var bytes (Max=9bytes)
Example of report MaxTime configuration:
Description Device CmdID DeviceType NetvoxPayLoadData
ConfigReportReq
R72632A
0x01
0x09
Reserved
(2bytes Unit:s)
MaxTime
(2bytes Unit:s)
Reserved
(5Bytes,Fixed 0x00)
ConfigReportRsp 0x81
Status
(0x00_success)
Reserved
(8Bytes,Fixed 0x00)
ReadConfigReportReq 0x02
Reserved
(9Bytes,Fixed 0x00)
ReadConfigReportRsp 0x82
Reserved
(2bytes Unit:s)
MaxTime
(2bytes Unit:s)
Reserved
(5Bytes,Fixed 0x00)
(1) Configure device parameter MaxTime = 2min
Downlink: 0109000000780000000000 // 78 (HEX) = 120 (DEC),
Device return:
8109000000000000000000 (configuration successful)
8109010000000000000000 (configuration failed)

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(2) Read device parameters
Downlink: 0209000000000000000000
Device return:
8209000000780000000000 (current parameters of device)
6. Installation
The device is suitable for measuring ordinary yellow-cinnamon soil, black soil, and terra rossa. It is not applicable to saline-alkali
land, sandy land, or other powdery objects with high salinity. The soil humidity shall be more than 25%
Installation and use method of sensor:
1. Quick test method:
Select a suitable measurement location, avoid stones, and ensure that the steel needle will not touch hard objects. Throw away
the topsoil according to the required measurement depth, maintain the original tightness of the soil below, hold the sensor
tightly and insert it vertically into the soil. When inserting, do not shake left and right. It is recommended to measure multiple
times to obtain the average value within a small range of a measurement point.
2. Buried measurement method:
Dig a pit with a diameter of >20cm vertically, insert the sensor steel needle horizontally into the pit wall at a given depth, and
fill the pit tightly. After it is stable for a period of time, it can be measured and recorded for consecutive days, months or even
longer.
Installation precautions:
1. When measuring, the steel needle must be completely inserted into the soil.
2. Avoid high temperature caused by strong sunlight directly shining on the sensor. Pay attention to lightning protection for field
use.
3. Don't bend the steel needle violently, don't pull the sensor lead wire forcibly, and don't beat or hit the sensor violently.
4. The protection grade of soil sensor is IP68, which can soak the whole soil sensor in water.
5. Due to the existence of RF electromagnetic radiation in the air, it is not suitable to be energized in the air for a long time.
Land filled after excavation
Avoid stones

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Precautions for battery use:
Because the passivation of the electrode surface of ER battery is the inherent characteristic of lithium thionyl chloride battery, the
user should activate the ER34615 3.6V lithium thionyl chloride battery with a 21 ohm resistor in parallel on the battery for 18
minutes before use, so as to actively eliminate the hysteresis of the battery.
Assembly precautions:
Users only need to disassemble and assemble the new battery when installing it. Please do not disassemble and assemble it
without authorization in other cases. Please do not touch the waterproof rubber strip, waterproof fixing head, waterproof LED
lamp and waterproof key during the process of assembling the battery.After the installation of the battery, you must use an electric
screwdriver with a torque set to 4kgf to assemble the housing screws (if there is no electric screwdriver, please use a cross
screwdriver with suitable screws to assemble and lock to ensure that the upper cover and the lower cover are assembled tightly),
otherwise the air tightness after assembly will be affected
7. Important Maintenance Instruction
The device is a product with superior design and craftsmanship and should be used with care.
The following suggestions will help you use the warranty service effectively.
Do not use or store in dusty or dirty areas. This way can damage its detachable parts and electronic components.
Do not store in excessive heat place. High temperatures can shorten the life of electronic devices, destroy batteries, and
deform or melt some plastic parts.
Do not store in an excessively cold place. Otherwise, when the temperature rises to normal temperature, moisture will form
inside which will destroy the board.
Do not throw, knock, or shake the device. Treating equipment roughly can destroy internal circuit boards and delicate
structures.
Do not wash with strong chemicals, detergents, or strong detergents.
Do not paint the device. Smudges can make debris block detachable parts up and affect normal operation.
Do not throw the battery into the fire to prevent the battery from exploding. Damaged batteries may also explode.
All the above suggestions apply equally to your device, batteries, and accessories.
If any device is not operating properly, please take it to the nearest authorized service facility for repair.