netvox R718E User manual

Model：R718E
Wireless Accelerometer
and
Surface Temperature Sensor
R718E
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.
Wireless Accelerometer and Surface Temperature Sensor

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Table of Content
1. Introduction.......................................................................................................................................................................................3
2.Appearance........................................................................................................................................................................................3
3. Main Features ...................................................................................................................................................................................4
4. Set up Instruction..............................................................................................................................................................................5
5. Data Report.......................................................................................................................................................................................6
5.1 ActiveThreshold and InActiveThreshold .................................................................................................................................7
5.2 Offset calibration ......................................................................................................................................................................7
5.3 The X, Y, Z axis direction of R718E ........................................................................................................................................7
5.4 Example of data configuration .................................................................................................................................................8
5.5 Example for MinTime/MaxTime logic...................................................................................................................................10
6. Example Application ......................................................................................................................................................................11
7. Installation ......................................................................................................................................................................................12
8. Information about Battery Passivation...........................................................................................................................................13
8.1 To determine whether a battery requires activation................................................................................................................13
8.2 How to activate the battery.....................................................................................................................................................13
9. Important Maintenance Instruction ................................................................................................................................................14

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1. Introduction
The R718E is identified as a LoRaWAN ClassAdevice with three-axis acceleration , temperature and compatible with LoRaWAN
protocol.
When the device moves or vibrates over threshold value, it immediately reports the temperature ,acceleration and velocity of the
X, Y, and Z axes.
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.
2. Appearance
Indicator
Function Key
NTC Thermistor Sensor

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3. Main Features
Apply SX1276 wireless communication module
2 sections ER14505 3.6V Lithium AA battery
Detect the acceleration and velocity of the X, Y, and Z axes
The base is attached with a magnet that can be attached to a ferromagnetic material object
Protection level IP65/IP67 (optional)
Compatible with LoRaWANTM Class A
Frequency hopping spread spectrum technology
Configuration parameters can be configured through third-party software platforms, data can be read and alarms can be set via
SMS text and email (optional)
Available third-party platform: Actility / ThingPark, TTN, MyDevices/Cayenne
Low power consumption and long battery life
Battery Life:
⁻Please refer to web: http://www.netvox.com.tw/electric/electric_calc.html
⁻At this website, users can find battery life time for variety models at different configurations.
1. Actual range may vary depending on environment.
2. Battery life is determined by sensor reporting frequency and other variables.

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4. Set up Instruction
On/Off
Power on Insert batteries. (users may need a flat blade screwdriver to open)
Turn on Press and hold the function key for 3 seconds till the green indicator flashes once.
Turn off
(Restore to factory setting) Press and hold the function key for 5 seconds till green indicator flashes for 20 times.
Power off Remove Batteries.
Note:
1. Remove and insert the battery; the device is at off state by default.
2. On/off interval is suggested to be about 10 seconds to avoid the interference of capacitor
inductance and other energy storage components.
3. Five seconds after power on, the device will be in engineering test mode.
Network Joining
Never joined 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
Function Key
Press and hold for 5 seconds
Restore to factory setting / Turn off
The green indicator flashes for 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 is on and 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.
Low Voltage Warning
Low Voltage 3.2V

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5. Data Report
Data report configuration and sending period are as following:
Min Interval
(Unit:second)
Max Interval
(Unit:second) Reportable Change Current Change≥ Reportable Change
Current Change＜
Reportable Change
Any number between
1~65535
Any number between
1~65535 Can not be 0. Report per Min Interval
Report
per Max Interval
The device will immediately send a version packet report along with two uplink packets including temperature, battery voltage,
acceleration and velocity of the X, Y, and Z axes.
The interval between these two packets will be 10 seconds.
The device sends data in the default configuration before any configuration is done.
Default setting:
MaxTime: Max Interval = 60 min = 3600s
MinTime: Max Interval = 60 min = 3600s
BatteryChange = 0x01 (0.1v)
AccelerationChange = 0x0003
ActiveThreshold = 0x0003
InActiveThreshold = 0x0002
Three-axis acceleration and velocity:
While the data of three-axis accelerometer of the device is lower than InActiveThreshold and the duration has to be lesser than
5 seconds, at this time, if the vibration continues (the data of three-axis accelerometer is higher than InActiveThreshold ), it will
be delayed for 5 seconds. Until the data of three-axis accelerometer is lower than InActiveThreshold, and the duration is more
than 5 seconds, R718E would send two packet, one is the data of three-axis accelerometer, and the other would be sent after 10
seconds with the data of the speed of three-axis & the temperature.
Note:
(1) The device report interval will be programmed based on the default firmware which may vary.
(2) The interval between two reports must be the minimum time.
Please refer Netvox LoRaWAN Application Command document and Netvox Lora Command Resolver
http://www.netvox.com.cn:8888/page/index to resolve uplink data.

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5.1 ActiveThreshold and InActiveThreshold
Formula
Active Threshold (or InActiveThreshold) = Critical value ÷ 9.8÷ 0.0625
* The gravitational acceleration at standard atmospheric pressure is 9.8 m/s2
* The scale factor of the threshold is 62.5 mg
Active Threshold Active Threshold can be changed by ConfigureCmd
Active Threshold range is 0x0003-0x00FF (default is 0x0003);
InActive Threshold InActive Threshold can be changed by ConfigureCmd
InActive Threshold range is 0x0002-0xFF (default is 0x0002)
Example
Assuming that the critical value is set to 10m/s2, the Active Threshold (or InActiveThreshold) to be set is
10/9.8/0.0625=16.32
Active Threshold (or InActiveThreshold) to be set integer as 16.
5.2 Offset calibration
The accelerometer is a mechanical structure that contains components that can move freely.
These moving parts are very sensitive to mechanical stress, far beyond solid-state electronics.
The 0g offset or offset is an important accelerometer indicator because it defines the baseline used to measure acceleration.
After installing R718E, turn on the device and wait for the device join the network 1 minute
, the device will automatically
offset the calibration.
If the device installation position moves, you need to power off the device 1 minute and restart turn on.
5.3 The X, Y, Z axis direction of R718E

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5.4 Example of data configuration
FPort：0x07
Bytes 1 1 Var(Fix =9 Bytes)
CmdID DeviceType NetvoxPayLoadData
CmdID– 1 bytes
DeviceType– 1 byte – Device Type of Device
NetvoxPayLoadData– var bytes (Max=9bytes)
Description Device Cmd
ID
Device
Type NetvoxPayLoadData
ConfigReport
Req
R718E
0x01
0x1C
MinTime
(2bytes Unit:s)
MaxTime
(2bytes Unit:s)
BatteryChange
(1byte Unit:0.1v)
Acceleration
Change
(2byte Unit:m/s2)
Reserved
(2Bytes,Fixed
0x00)
ConfigReport
Rsp 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)
BatteryChange
(1byte Unit:0.1v)
Acceleration
Change
(2byte Unit:m/s2)
Reserved
(2Bytes,Fixed
0x00)
SetActive
ThresholdReq 0x03 ActiveThreshold (2Bytes)
InActiveThreshold
(2Bytes)
Reserved (5Bytes,Fixed
0x00)
SetActive
ThresholdRsp 0x83 Status (0x00_success)
Reserved
(8Bytes,Fixed 0x00)
GetActive
ThresholdReq 0x04 Reserved (9Bytes,Fixed 0x00)
GetActive
ThresholdRsp 0x84 ActiveThreshold (2Bytes) InActiveThreshold (2Bytes)
Reserved
(5Bytes,Fixed 0x00)
(1)Configure device parameters MinTime = 1min, MaxTime = 1min, BatteryChange = 0.1v, Acceleratedvelocitychange = 1m/s2
Downlink: 011C003C003C0100010000 003C(Hex) = 60(Dec)
Device returns:

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811C000000000000000000 (configuration is successful)
811C010000000000000000 (configuration failed)
(2)Read device parameters
Downlink: 021C000000000000000000
Device returns:
821C003C003C0100010000 (current device parameters)
(3)Assuming that the Active Threshold is set to 10m/s2, the value to be set is 10/9.8/0.0625=16.32,and the last value obtained is
an integer and is configured as 16.
Assuming that the InActive Threshold is set to 8m/s2, the value to be set is 8/9.8/0.0625=13.06, and the last value obtained is
an integer and is configured as 13.
Configure device parameters ActiveThreshold=16, InActiveThreshold=13
Downlink: 031C0010000D0000000000
Device returns:
831C000000000000000000 (configuration is successful)
831C010000000000000000 (configuration failed)
Read device parameters
Downlink: 041C000000000000000000
Device returns:
841C0010000D0000000000 (device current parameter)

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5.5 Example for MinTime/MaxTime logic
Example#1 based on MinTime = 1 Hour, MaxTime= 1 Hour, Reportable Change i.e. BatteryVoltageChange=0.1V
MaxTime MaxTime
Sleeping(MinTime) Sleeping(MinTime)
Note: MaxTime=MinTime. Data will only be report according to MaxTime (MinTime) duration regardless BatteryVoltageChange
value.
Example#2 based on MinTime = 15 Minutes, MaxTime= 1 Hour, Reportable Change i.e. BatteryVoltageChange= 0.1V.
MaxTime
Sleeping(MinTime) sleeping sleeping sleeping
0H 15th M 30th M 45th M 1H
Example#3 based on MinTime = 15 Minutes, MaxTime= 1 Hour, Reportable Change i.e. BatteryVoltageChange= 0.1V.
MaxTime
sleeping sleeping ...
0H 15th M 30th M 45th M 1H 1H 10th M 1H 25th M 1H 40th M 1H 55th M 2H 10th M
Notes :
1) The device only wakes up and performs data sampling according to MinTime Interval. When it is sleeping, it does not
collect data.
2) The data collected is compared with the last data reported. If the data variation is greater than the ReportableChange value,
the device reports according to MinTime interval. If the data variation is not greater than the last data reported, the device
reports according to MaxTime interval.
Wakes up and
collects data
3.6V
Does not report
Wakes up and
collects data
3.6V
Does not report
Wakes up and
collects data
3.6V
Does not report
Wakes up and
collects data
REPORTS 3.6V
Wakes up and
collects data
REPORT 3.6V
Wakes up and
collects data
REPORTS 3.6V
Wakes up and collects data
3.5V |3.5-3.6|=0.1
REPORTS 3.5V
Wakes up and
collects data
3.5V
Does not report
Wakes up and
collects data
3.5V
Does not report
Wakes up and
collects data
3.5V
Does not report
Wakes up and
collects data 3.5V
Does not report
Wakes up and
collects data
3.5V
Does not report
Wakes up and
collects data
REPORTS 3.5V
Wake up and collects data
REPORTS 3.6V
Wakes up and collects data
REPORTS 3.6V
Wakes up and collects data
REPORTS 3.6V
Wakes up and
collects data
3.6V
Does not report
Users push the button,
REPORTS 3.5V.
Recalculate MaxTime.

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3) We do not recommend to set the MinTime Interval value too low. If the MinTime Interval is too low, the device wakes up
frequently and the battery will be drained soon.
4) Whenever the device sends a report, no matter resulting from data variation, button pushed or MaxTime interval, another
cycle of MinTime/MaxTime calculation is started.
6. Example Application
In the case of detecting if the generator is working normally, it is recommended to install R718E horizontal while the generator is
power-off and in static status.After installing and fixing R718E, please turn on the device.After the device is joined, one minute
later, R718E would perform the offset calibration of the device (the device cannot be moved after the offset calibration. If it needs
to be moved, the device needs to be turned off/powered off for 1 minute, and then the offset calibration would be performed
again). R718E would need some time to gather the data of three-axis accelerometer & the temperature of the generator while it is
working normally. The data is a reference for the settings of ActiveThreshold & InActiveThreshold, it is also for checking if the
generator is working abnormally.
Assuming that the collected ZAxis Accelerometer data is stable at 100m/s², the error is ±2m/s², theActiveThreshold can be set to
110m/s², and the InActiveThreshold is 104m/s².

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7. Installation
1. The Wireless Accelerometer and Surface Temperature
Sensor(R718E) has a built-in magnet
When installed, it can be attached to the surface of an object
with iron which is convenient and quick.
To make the installation more secure, use screws (purchased)
to secure the unit to a surface
Note:
Do not install the device in a metal shielded box or in an
environment with other electrical equipment around it to
avoid affecting the wireless transmission of the device.
3.When R718E detects the data of three-axis accelerometer
exceed ActiveThreshold, R718E would report the data that
detected.After sending the data of three-axis accelerometer, the
data of three-axis accelerometer of the device needs to be lower
than InActiveThreshold and the duration has to be more than 5
seconds (cannot be modified) before the next detection.
Note：
While the data of three-axis accelerometer of the device is
lower than InActiveThreshold and the duration has to be
lesser than 5 seconds, at this time, if the vibration continues
(the data of three-axis accelerometer is higher than
InActiveThreshold ), it will be delayed for 5 seconds. Until
the data of three-axis accelerometer is lower than
InActiveThreshold, and the duration is more than 5 seconds.
R718E would send two packets, one is the data of three-axis
accelerometer, and the other would be sent after 10 seconds
with the data of the speed of three-axis & the temperature.
NTC Thermistor Sensor
2. Installation Precautions：
While installing, it is recommended to install R718E horizontal
while the generator is power-off and in static status. After
installing and fixing R718E, please turn on the device.After the
device is joined, one minute later, R718E would perform the
offset calibration of the device (the device cannot be moved after
the offset calibration. If it needs to be moved, the device needs to
be turned off/powered off for 1 minute, and then the offset
calibration would be performed again). R718E would need some
time to gather the data of three-axis accelerometer & the
temperature of the generator while it is working normally. The
data is a reference for the settings of ActiveThreshold &
InActiveThreshold, it is also for checking if the generator is
working abnormally.
screw hole screw hole

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Note:
Please do not disassemble the device unless it is required to replace the batteries.
Do not touch the waterproof gasket, LED indicator light, function keys when replacing the batteries. Please use suitable
screwdriver to tighten the screws (if using an electric screwdriver, it is recommended to set the torque as 4kgf) to ensure the
device is impermeable.
8. Information about Battery Passivation
Many of Netvox devices are powered by 3.6V ER14505 Li-SOCl2 (lithium-thionyl chloride) batteries that offer many
advantages including low self-discharge rate and high energy density.
However, primary lithium batteries like Li-SOCl2 batteries will form a passivation layer as a reaction between the lithium
anode and thionyl chloride if they are in storage for a long time or if the storage temperature is too high. This lithium chloride
layer prevents rapid self-discharge caused by continuous reaction between lithium and thionyl chloride, but battery passivation
may also lead to voltage delay when the batteries are put into operation, and our devices may not work correctly in this situation.
As a result, please make sure to source batteries from reliable vendors, and the batteries should be produced within the last
three months.
If encountering the situation of battery passivation, users can activate the battery to eliminate the battery hysteresis.
8.1 To determine whether a battery requires activation
Connect a new ER14505 battery to a 68ohm resistor in parallel, and check the voltage of the circuit.
If the voltage is below 3.3V, it means the battery requires activation.
8.2 How to activate the battery
a. Connect a battery to a 68ohm resistor in parallel
b. Keep the connection for 6~8 minutes
c. The voltage of the circuit should be ≧3.3V

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9. Important Maintenance Instruction
Kindly pay attention to the following in order to achieve the best maintenance of the product:
•Keep the device dry. Rain, moisture, or any liquid, might contain minerals and thus corrode electronic circuits. If the device
gets wet, please dry it completely.
•Do not use or store the device in dusty or dirty environment. It might damage its detachable parts and electronic components.
•Do not store the device under excessive heat condition. High temperature can shorten the life of electronic devices, destroy
batteries, and deform or melt some plastic parts.
•Do not store the device in places that are too cold. 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. Rough handling of equipment can destroy internal circuit boards and delicate
structures.
•Do not clean the device with strong chemicals, detergents or strong detergents.
•Do not apply the device with paint. Smudges might block in the device and affect the operation.
•Do not throw the battery into the fire, or the battery will explode. Damaged batteries may also explode.
All of the above applies to your device, battery and accessories. If any device is not working properly, please take it to the nearest
authorized service facility for repair.