netvox R718PA8 User manual

Model: R718PA8
Wireless pH Sensor
Wireless pH Sensor
R718PA8
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. MainFeature ..........................................................................3
4. Set Up Instruction .................................................................4
5. Data Report ...........................................................................5
6. Installation.............................................................................7
6.1 PH Sensor Use.....................................................................7
6.2 PH Sensor Maintenance.......................................................8
7. Important Maintenance Instruction .....................................10

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1.Introduction
R718PA8 is a Class A device based on the LoRaWANTM protocol of Netvox and is compatible with LoRaWAN protocol.
R718PA8 can be connected with a pH sensor (RS485) and report the pH value and temperature of the solution collected by the device
to the corresponding gateway.
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 Feature
Adopt SX1276 wireless communication module
RS485 communication
12V DC power supply
pH value of solution and temperature detection
The base is equipped with a magnet that can be attached to the iron object
Main body protection level IP65/IP67 (optional)
Compatible with LoRaWANTM Class A
Frequency hopping spread spectrum technology
Configuring parameters and reading data via the third-party software platforms, and set alarms via SMS text and email (optional)
Applicable to the third-party platforms: Actility/ ThingPark/ TTN/ MyDevices/ Cayenn
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.
PH Sensor
Indicator
Function Key
Adapter

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4.Set Up Instruction
On/Off
Power On
DC12V adapter
Turn On
DC12V power supply, the green indicator flashing once means turn on successfully.
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 DC12V adapter
Note
1. On/off interval is suggested to be about 10 seconds to avoid
the interference of capacitor inductance and other energy storage components.
2. In the first 5 seconds after power on, the device will be in engineering test mode.
Function Key
Press and Hold for 5 Seconds
Restore to the original setting / turn off
The green indicator flashes 20 times: success
The green indicator remains off: fail
Press once
The device is in the network: the green indicator flashes once and the device sends a data report
The device is not in the network: the green indicator remains off
Network Joining
Never Join the Network
Turn on the device to search the network.
The green indicator keeps on for 5 seconds: success.
The green indicator remains off: fail
Had Joined the Network
( Not restore to the factory setting )
Turn on the device to search the previous network.
The green indicator keeps on for 5 seconds: success.
The green indicator remains off: fail
Fail to Join the Network
Suggest to check the device registration information on the
gateway or consulting your platform server provider

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5.Data Report
After power on, the device will immediately send a version packet report. Then, it will send another report with the data of pH
value and temperature of the solution after it is powered on for 20s.
The device sends data according to the default configuration before any other configuring.
Default setting:
MaxTime: Max Interval = 3min = 180s
MinTime: The MinTime configuration is not available.
*But the software has restriction, MinTime must be configured a number greater than 0.
Note:
Report interval is based on the factory default.
R718PA8 reports the pH value and temperature of the solution.
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)
Device
Device
Type
Report
Type
NetvoxPayLoadData
R718PA Series
(R718PA8)
0x57
0x08
Battery
(1Byte, unit:0.1V)
PH
(2Bytes ,0.01pH)
TemperaturewithPH
(Signed 2Bytes,unit:0.01°C)
ORP
(Signed 2Bytes ,1mv)
Reserved
(1Byte,fixed 0x00)
Uplink: 015708000226092EFFFF00

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1st byte (01): Version
2nd byte (57): Device Type 0x57 － R718PA Series
3rd byte (08): ReportType
4th byte (00): DC power supply
5th 6th byte (0226): PH 226 Hex = 550 Dec , 550*0.01ph =5.50 pH
7th 8th byte (092E): Temperature 92E Hex = 2350 Dec , 2350*0.01°C = 23.50°C
9th 10th byte (FFFF): ORP
11th byte (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)
(1)Configure R718PA8 device parameter MaxTime = 60s
(The MinTime configuration is useless,but it needs to be set greater than 0 because of the software limitation.)
Downlink: 0157000A003C0000000000
Device return:
8157000000000000000000 (configuration success)
8157010000000000000000 (configuration failure)
Description
Device
Cmd
ID
Device
Type
NetvoxPayLoadData
Config
ReportReq
R718PA
Series
(R718PA8)
0x01
0x57
MinTime
(2bytes Unit: s)
MaxTime
(2bytes Unit: s)
Reserved
(5Bytes,Fixed 0x00)
Config
ReportRsp
0x81
Status
(0x00_success)
Reserved
(8Bytes, Fixed 0x00)
ReadConfig
ReportReq
0x02
Reserved
(9Bytes, Fixed 0x00)
ReadConfig
ReportRsp
0x82
MinTime
(2bytes Unit: s)
MaxTime
(2bytes Unit: s)
Reserved
(5Bytes,Fixed 0x00)

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(2)Read R718PA8 device parameter
Downlink: 0257000000000000000000
Device return:
8257000A003C0000000000 (device current parameter)
6.Installation
6.1 PH Sensor Use
The water level of the water you plan to measure the pH value of is recommended to be higher than the spiral curve on the pH sensor.
`
Note:
(1)The sensor is recommended to be installed with angles higher than 15 degrees.
(2)Horizontal or upside-down position is not allowed.
Spiral curve
> 15 °

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6.2 PH Sensor Maintenance
When measuring the pH sensor, it should be cleaned in distilled water (or deionized water), and the filter paper should be used to
absorb moisture to prevent impurities from being introduced into the liquid to be tested. 1/3 of the sensor should be inserted into the
solution to be tested.
The sensor should be washed when not in use, inserted into a protective sleeve with a 3.5 mol/L potassium chloride solution, or the
sensor inserted into a container with a 3.5 mol/L potassium chloride solution.
If the liquid in the cover of the pH sensor dries out, you could replace the liquid with potassium chloride liquid or tap water. Please
do not use purified water or deionized water.
Check if the terminal is dry. If it is stained, wipe it with absolute alcohol and dry it. Avoid long-term immersion in distilled water or
protein solution and prevent contact with silicone grease. With a longer sensor, its glass film may become translucent or with
deposits, which can be washed with dilute hydrochloric acid and rinsed with water. The sensor is used for a long time. When a
measurement error occurs, it must be calibrated with the meter for calibration.
When the calibration and measurement cannot be performed while the sensor is being maintained and maintained in the above
manner, the sensor has failed. Please replace the sensor.
Note:
PH sensor can be placed in water for a long time. If PH sensor is not applicable, please add some water to the sponge in the
protective shell of the probe, and then install the protective shell to the probe position. PH senor can not be exposed to the sun, and
should be placed in a humid environment. If PH sensor is put in the water for a long time, it will consume the electrode. When the
electrode is consumed to a certain extent, the electrode needs to be replaced, and the life span is about half a year.

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1. R718PA8 has the built-in magnet (as the figure below) which can be
attached to the surface of an iron object during installation, which is
convenient and quick.
In order to make the installation firmer, please use screws
(purchased separately) to fix the device to the wall or other surface
(as Figure below).
Note: Do not install the device in a metal shielded box or in an
environment surrounded by other electrical equipment to avoid
affecting the wireless transmission of the device.
2. R718PA8 regularly reports data that is pH value and the
solution temperature according to MaxTime. The default
Max Time is 3 minutes.
Note:
MaxTime can be modified by the downlink command, but
it is recommended not to set the interval too short.
R718PA8 can be applied to detecting the pH value and the
solution temperature Example:
Water Quality Monitor
Industrial Sewage Disposal
Agricultural Irrigation/Aquaculture
Swimming Pool/Hot Spring
Screw Fixation
Screw Fixation

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7.Important Maintenance Instruction
Kindly pay attention to the following in order to achieve the best maintenance of the product:
• Keep the equipment dry. Rain, moisture and various liquids or water may contain minerals that can corrode electronic circuits. In case
the device is wet, please dry it completely.
• 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 excessive 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 repairing.