netvox R720FLT User manual

Wireless Toilet Water Tank Leakage sensor
Model：R720
FLT
Wireless Toilet Water Tank
Leakage sensor
R720FLT
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
5.3 Example for MinTime/MaxTime logic.............................................8
6. Installation.......................................................................................9
7. Information about Battery Passivation..............................................10
7.1 To determine whether a battery requires activation ........................11
7.2 How to activate the battery.............................................................11
8. Important Maintenance Instruction...................................................12
9. Description of waterproof grade.......................................................12

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1. Introduction
R720FLT is a wireless communication device for netvox ClassA device based on LoRaWAN open protocol.
The device is connected with two electrode rods to detect the water make-up of the toilet water tank, detect the daily water make-
up times and whether the water tank is faulty, and transmit the detected data to other devices through the wireless network for
display; Compatible with LoRaWAN protocol. The toilet water tank leakage detection device can cut the electrode rod to the
required length as required.
①The status of the toilet water tank is determined according to the configured water make-up time (default is 5 minutes). When
the actual water make-up time of the toilet exceeds the preset time, the toilet water tank is in an abnormal state, and a data package
of the current voltage value, the current water make-up times and the status is reported.
②Press the key to immediately detect the current voltage value, the current number and status of toilet water tank replenishment,
and report a current detected data packet.
③Check the water supplement times every 24 hours. If the preset times are exceeded (50 times by default), the toilet water tank
is in an abnormal state, and report a data package of the current voltage value, current water supplement times and state of the
toilet water tank.
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 ER14505 lithium batteries (3.6V / section) in parallel
Detect the number and status of make-up water of toilet water tank
Protection Class IP65
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.
Function Key
Indicator

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4. Set up Instruction
On/Off
Power On
Insert batteries. (users may need a 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 and the green indicator flashes 20 times.
Power Off
Remove Batteries
Note
1. Remove and insert the battery: the device is in the turn-off state by default.
2. After 5 seconds of powering on, the device is in engineering testing mode.
3. Every time, after remove and reinsert the battery, the device is in a turn-off state and
need to turn on again.
4. On/off interval is suggested to be about 10 seconds to avoid the interference of capacitor
inductance and other energy storage components.
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 your 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 is powered on but not
connected to the network
Note:
1. It is recommended to take out 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
3.2 V

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5. Data Report
After power on, the device will immediately send a version packet report and a data report including
the device battery voltage, the
number and status of toilet water tank replenishment.
Default setting:
Max Interval = 0x0E10 (3600s)
Min Interval = 0x0E10 (3600s) // Every Min Interval will detect the current voltage one time
Battery Change = 0x01 (0.1v)
DailyReplenishwaterAlarmcount = 0x0032 (50 times)
FalutCheckTime = 0x012C (300s)
* If there is a special customized order, the setting of the device will change according to customer’s requirements
Fault Alarm:
FaultAlarm is reported as 0, indicating that the single water supplement of the toilet water tank is normal.
FaultAlarm is reported as 1, indicating that the single water supplement of the toilet water tank is abnormal.
Tank Leak Alarm:
TankLeakAlarm is reported as 0, indicating that the number of water replenishments in the toilet water tank within 24 hours is
normal.
TankLeakAlarm is reported as 1, indicating that the number of water replenishments in the toilet water tank within 24 hours is
abnormal.
Replenish water count:
Replenishwatercount is the cumulative make-up times of the toilet water tank.
When the device is powered off, clear or issue a command to clear (ClearReplenishwatercountReq).
Note:
1. The cycle of the device sending the data report is according to the default.
2. The interval between two reports must be the MinTime.
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
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
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

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ReportType – 1 byte –the presentation of the NetvoxPayLoadData，according the devicetype
NetvoxPayLoadData– Fixed bytes (Fixed =8bytes)
Device Device
Type Report Type NetvoxPayLoadData
R720FLT 0xD4 0x01 Battery (1Byte)
unit:0.1V
Replenish
water count
(4bytes)
Fault Alarm
(1Byte)
0:off
1:on
Tank Leak Alarm
(1Byte)
0x00_noleak
0x01_leak
Reserved
(1Byte)
fixed 0x00
Example of uplink 1:01D401240000002F000000
1st byte (01): Version
2nd byte(D4): DeviceType 0xD4 －R720FLT
3rd byte (01): ReportType
4th byte (24): Battery, 24 (Hex)=36 (Dec)36*0.1v=3.6v
5th 6th 7th 8th byte (0000002F): Replenish water count, 2F (Hex)=47 (Dec)
9th byte (00): Fault Alarm, no alarm
10th byte (00): Tank Leak Alarm, no alarm
11th byte (00): Reserved
Example of uplink 2:01D4019F00000168010000
1st byte (01): Version
2nd byte(D4): DeviceType 0xD4 －R720FLT
3rd byte (01): ReportType
4th byte (9F): Battery－3.1V (Low battery), 1F(Hex)=31 (Dec)31*0.1v=3.1v
// Battery Bit7 represent low battery Bit6-0 represent battery voltage
5th 6th 7th 8th byte (00000168): Replenish water count－360 times, 168(Hex)=360(Dec)
9th byte (01): Fault Alarm, alarm
10th byte (00): Tank Leak Alarm, no alarm
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)

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Description Device CmdI
DDevice Type NetvoxPayLoadData
Config
ReportReq
R720FLT
0x01
0xD4
MinTime
(2bytes Unit:s) MaxTime (2bytes Unit:s) BatteryChange (1byte Unit:0.1v)
Reserved
(4Bytes,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) BatteryChange (1byte Unit:0.1v)
Reserved
(4Bytes,Fixed
0x00)
(1)Configure R720 FLT device parameter MinTime = 1min、MaxTime = 1min、BatteryChange = 0.1v
Downlink:01D4003C003C0100000000 // 3C(Hex)=60(Dec)
Device return：
81D4000000000000000000 (configuration success)
81D4010000000000000000 (configuration failure)
(2)Read R720FLT device parameter
Downlink: 02D4000000000000000000
Device return：
82D4003C003C0100000000 (device current parameter)
Description Device
Cmd
ID
Device
Type NetvoxPayLoadData
SetFaultCheckTimeReq
(Remain last config when
reset to factory)
R720FLT
0x03
0xD4
FalutCheckTime
(2Byte,Unit:1s )
Reserved
(7Bytes,Fixed 0x00)
SetFault
CheckTimeRsp 0x83
Status
(0x00_success)
Reserved
(8Bytes,Fixed 0x00)
GetFault
CheckTimeReq 0x04
Reserved
(9Bytes,Fixed 0x00)
GetFault
CheckTimeRsp 0x84
FalutCheckTime
(2Byte,Unit:1s )
Reserved
(7Bytes,Fixed 0x00)
Clear
ReplenishwatercountReq 0x05
Reserved
(9Bytes,Fixed 0x00)
Clear
ReplenishwatercountRsp 0x85
Status
(0x00_success)
Reserved
(8Bytes,Fixed 0x00)
SetDailyReplenishwater
AlarmcountReq
(Remain last config when
reset to factory)
0x06 DailyReplenishwater
Alarmcount (2Byte )
Reserved
(7Bytes,Fixed 0x00)

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SetDailyReplenishwater
AlarmcountRsp 0x86
Status
(0x00_success)
Reserved
(8Bytes,Fixed 0x00)
GetDailyReplenishwater
AlarmcountReq 0x07
Reserved
(9Bytes,Fixed 0x00)
GetDailyReplenishwater
AlarmcountRsp 0x87
DailyReplenishwater
Alarmcount (2Byte)
Reserved
(7Bytes,Fixed 0x00)
(1)Set fault check time is 180s
Downlink: 03D400B400000000000000 // B4(Hex)=180(Dec)
Device return：
83D4000000000000000000 (configuration success)
83D4010000000000000000 (configuration failure)
(2)Clear replenish water count
Downlink: 05D4000000000000000000
Device return：
85D4000000000000000000 (configuration success)
85D4010000000000000000 (configuration failure)
5.3 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#2based 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 2H
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
Wake up and collects data
REPORTS 3.6V
Wakes up and collects data
REPORTS 3.6V
Wakes up and collects data
REPORTS 3.6V

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Example#3 based on MinTime = 15 Minutes, MaxTime= 1 Hour, Reportable Change i.e. BatteryVoltageChange= 0.1V.
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.
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. Installation
This product has waterproof function.
Installation method of toilet water tank leakage detection equipment:
Step1. Open the toilet water tank cover.
Step 2. Press the handle gently to drain water until the toilet begins to replenish water. Record the water level at this time,
namely the make-up water level.
Step 3. When the water supplement stops, record the current water level, that is, the full water level.
Step 4. Use a ruler to measure the middle position from the water tank cover to the full water level and the make-up water
level.
Step 5. Reduce the length of the probe according to the measured value, so that the end of the probe is in the middle of the
make-up water level and the full water level.
Step 6. Lock R720FLT on the bracket and hang it on the water tank wall.
Step 7. Close the upper cover of the toilet water tank to complete the installation.
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
Wakes up and
collects data
3.6V
Does not report
Users push the
button,
REPORTS 3.5V.
MaxTime

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Replace the detector:
when the parts of the toilet water tank are aging, resulting in the change of water make-up or full liquid level, and the probe
length is insufficient. It is not necessary to purchase a new R720FLT, just remove the old probe, replace it with a new one, and
adjust the probe length according to the installation steps.
7. 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

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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 it is suggested that if the storage period is more
than one month from the date of battery production, all the batteries should be activated.
If encountering the situation of battery passivation, users can activate the battery to eliminate the battery hysteresis.
ER14505 Battery Passivation:
7.1 To determine whether a battery requires activation
Connect a new ER14505 battery to a resistor in parallel, and check the voltage of the circuit.
If the voltage is below 3.3V, it means the battery requires activation.
7.2 How to activate the battery
a. Connect a battery to a resistor in parallel
b. Keep the connection for 5~8 minutes
c. The voltage of the circuit should be ≧3.3, indicating successful activation.
Brand Load Resistance Activation Time Activation Current
NHTONE 165 Ω 5 minutes 20mA
RAMWAY 67 Ω 8 minutes 50mA
EVE 67 Ω 8 minutes 50mA
SAFT 67 Ω 8 minutes 50mA
Note:
If you buy batteries from other than the above four manufacturers, then the battery activation time, activation current, and
required load resistance shall be mainly subject to the announcement of each manufacturer.

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8. 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.
• 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.
9. Description of waterproof grade
1: According to Enclosure Protection Class
This standard is equivalent to IEC 60529:2001 Degrees of Protection Provided by Enclosures (IP Code) (English version)
2: The test method of IP65 waterproof grade is: spray the device in all directions under 12.5L/min water flow for 3min, and the
internal electronic function is normal.
The test method of IP67 waterproof grade is: the device is immersed in 1m deep water for 30min, and the internal electronic
function is normal.
IP65, dust-proof and to prevent damage caused by water from nozzles in all directions from invading electrical appliances. It can
be used in general indoor environment and sheltered outdoor environment. It is not suitable for use in environments with high
water pressure, high temperature and high humidity, such as long time direct sunlight outdoors and possible direct exposure to
rainstorm. If it is really necessary to install in harsh environments, it is recommended to add sunscreen and rainproof shields
when installing.