netvox R311CA User manual

Wireless Dry Contact Sensors
Model: R311CA
Wireless Dry Contact Sensor
R311CA
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.

1
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 ConfigureCmd ..................................................6
5.2 Example of ConfigureCmd ..................................................7
5.3 Example for MinTime/MaxTime logic.................................8
6. Installation................................................................................10
7. Important Maintenance Instruction...........................................11

2
1. Introduction
The R311CAis a dry contact detection device for Netvox ClassA type devices based on the LoRaWAN open protocol and is
compatible with LoRaWAN protocol. When any dry contact of R311CA detects a change, R311CAwill send a message to the
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 and 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
2 x 3V CR2450 button batteries
Compatible with LoRaWAN
Adopt SX1276 wireless communication module.
Dry contact detection
Frequency hopping spread spectrum technology.
Applicable to the third-party platforms: Actility/ ThingPark/ TTN/ MyDevices/ Cayenne
Note: Battery life is determined by sensor reporting frequency and other variables.
Please refer to web: http://www.netvox.com.tw/electric/electric_calc.html
In this website, users can find battery lifetime for various models at different configurations.
Function Key
Indicator

4
4. Set up Instruction
On/Off
Power on Insert batteries (users need a flat blade screwdriver to open)
Turn on Press any function key till green and red indicator flashes once.
Turn off (Restore to original setting) Press and hold the function key for 5 seconds till the green indicator flashes 20 times.
Power off Remove Batteries
Note:
1. Remove and insert the battery; the device memorizes previous on/off state by default.
2. Press any function key and insert batteries at the same time; it will enter engineer testing
mode.
3. 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 to join.
The green indicator stays on for 5 seconds: success
The green indicator remains off: fail
Had joined the network
(Not in the original setting)
Turn on the device to search for the previous network to join.
The green indicator stays on for 5 seconds: Success
The green indicator remains off: Fail
Fail to join the network Suggest checking device verification on the gateway or consulting your platform service
provider if the device fails to join the network.
Function Key
Press two function keys 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 sends a report
The device is not in the network: the green indicator remains off
Low Voltage Warning
Low Voltage 2.4V
Sleeping Mode
The device is turn on and join in the
network
Sleeping period: Min Interval.
When reportchange exceeds the set value: send data packets according to Min Interval.

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5. Data Report
When the device is powered on, it will immediately send a version package report and a report data with voltage value and
dry contact status.
Before any configuration is performed, the device sends data according to the default configuration.
Default setting:
MaxTime: 0x0E10 (3600s)
MinTime: 0x0E10 (3600s)
Batterychange: 0x01 (0.1V)
Triggering the dry contact:
When the state of R311CA dry contact changes, the Report will be sent immediately.
Disconnect : 0
Connect : 1
Command - LastMessageResendtime:
When the state of R311CAdry contact changes, the Report will be sent immediately, and the current dry contact state will be
resent after 5 seconds.
*The resending time can be modified through commands.
*The time range is from 3s to 254s.
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 documents and URL:
http://www.netvox.com.cn:8888/cmddoc
Data report configuration and sending period are as follows：
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

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5.1 Example of ConfigureCmd
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
TypeNetvoxPayLoadData
R311CA 0x4C
0x00 SoftwareVersion
(1Byte)Eg.0x0A—V1.0
HardwareVersion
(1Byte)
DateCode
(4Bytes,eg0x20170503)
Reserved
(2Bytes,fixed 0x00)
0x01 Battery
(1Byte, unit:0.1V)
Status1
(1Byte 0:off 1:on)
Status2
(1Byte 0:off 1:on)
Reserved
(5Bytes,fixed 0x00)
Example of Uplink: 014C011E01000000000000
1st byte (01): Version
2nd byte (4C): DeviceType 0x4C－R311CA
3rd byte (01): ReportType
4th byte (1E): Battery－3.0V, 1E(HEX)=30(DEC),30*0.1v=3.0v
5th byte (01): Status1－On
6th byte (00): Status2－Off
7th ~ 11th byte (0000000000): Reserved
Tips
1. Battery Voltage:
The voltage value is bit 0 ~ bit 6, bit 7=0 is normal voltage, and bit 7=1 is low voltage.
Battery=0x97, binary=1001 0111, if bit 7= 1, it means low voltage.
The actual voltage is 0001 0111 = 0x17 = 23, 23*0.1v =2.3v
2. Version Packet:
When Report Type=0x00 is the version packet, such as 014C000A0B202005200000, the firmware version is 2020.05.20
3. Data Packet:
When Report Type=0x01 is data packet.

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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 R311CA device parameter MinTime = 1min、MaxTime = 1min、BatteryChange = 0.1v
Downlink：014C003C003C0100000000
Device return：
814C000000000000000000 (configuration success)
814C010000000000000000 (configuration failure)
(2) Read R311CA device parameter.
Downlink: 024C000000000000000000
Device return：
824C003C003C0100000000 (device current parameter)
SetLastMessage
ResendtimeReq
ALL(0xFF)
only used in
contact switch
device type
0x1F
0xFF
Resendtime(1Byte)
Unit:1s , Range:3-254s
when 0 or 255 no resend,
default is no resend
Reserved
(8Bytes,Fixed 0x00)
SetLastMessage
ResendtimeRsp 0x9F Status(0x00_success) Reserved (8Bytes,Fixed 0x00)
Description Device CmdID Device
Type NetvoxPayLoadData
Config
ReportReq
R311CA
0x01
0x4C
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)

8
GetLastMessage
ResendtimeReq 0x1E Reserved (9Bytes,Fixed 0x00)
GetLastMessage
ResendtimeRsp 0x9E
Resendtime(1Byte)
Unit:1s , Range:3-254s
when 0 or 255 no resend,
default is no resend
Reserved
(8Bytes,Fixed 0x00)
(3) Set Last Message Resend time, resend time =5s
Downlink：1FFF050000000000000000
Device return：
9FFF000000000000000000 (configuration success)
9FFF010000000000000000 (configuration failure)
(4) Get Last Message Resend time
Downlink：1EFF000000000000000000
Device return：
9EFF050000000000000000 (device current parameter)
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 BtteryVoltageChange
value.
Wake up and collects data
REPORTS 2.8V
Wakes up and collects data
REPORTS 2.8V
Wakes up and collects data
REPORTS 2.8V

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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 2H
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
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 collected data is compared with the last reported data. If the variation of the data is greater than the value of
ReportableChange, the device will report according to MinTime interval. If the data variation is not greater than the last
reported data, the device will report according to MaxTime interval.
(3) We do not recommend setting the MinTime Interval value too low. If the MinTime Interval is too low, the device will wake
up frequently and the battery will be drained soon.
(4) When the device sends a report, no matter the data changes, button is pushed or MaxTime interval comes, another cycle of
MinTime / MaxTime calculation starts.
Wakes up and
collects data
2.8V
Does not report
Wakes up and
collects data
2.8V
Does not report
Wakes up and
collects data
REPORT 2.8V
Wakes up and
collects data
2.8V
Does not report
Wakes up and
collects data
REPORT 2.8V
Wakes up and collects
data
2.7V |2.7-2.8|=0.1
REPORTS 2.7V Wakes up and
collects data 2.7V
Does not report
Users push the button,
REPORTS 2.7V.
Recalculate MaxTime.
Wakes up and
collects data
2.8V
Does not report
Wakes up and
collects data
REPORT 2.8V
Wakes up and
collects data
2.7V
Does not report
Wakes up and
collects data
2.7V
Does not report
Wakes up and
collects data
2.7V
Does not report
Wakes up and
collects data
2.7V
Does not report
Wakes up and
collects data
REPORT 2.7V

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6. Installation
Fig. Diagram of connecting with the wired smoke sensor
1. Remove the 3M release paper on the back of the device
and attach the device to the smooth wall (please do not
stick it to the rough wall to avoid falling off after a
longtime usage).
Note:
Wipe the wall surface before installation to avoid dust
on the wall surface that affect the effect of the paste.
Do not install the device in a metal shielded box or
other electrical equipment around it to avoid affecting
the wireless transmission of the device.
The dry contact sensor (R311CA) can be applied to the
following scenes:
Various switches and buttons
The output of the dry contact of the sensor
The operating state of the device
Monitoring the condition of doors and windows in home or
in business
2.When the device detects the state of dry contact changing,
the data report will be sent immediately.
3.If detect the battery voltage exceeding the value of the
variation at MinTime, the report will be sent immediately.
4.No matter the state of the dry contact changes, the data
report must be sent at MaxTime.
Note:
When the dry contact is connected, the state is “1”.
When the dry contact is disconnect, the state is “0”
R311CA
External power supply
Wired smoke sensor
External power supply
Wired smoke sensor

11
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.
• 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.