netvox RA02C User manual

Wireless CO Detector
Model: RA02C
Wireless CO Detector
RA02C
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 Feature......................................................................................................................................3
4. Set up Instruction...............................................................................................................................4
5. Data Report .......................................................................................................................................5
5.1 Example of ReportDataCmd.......................................................................................................6
5.2 Example of ConfigureCmd.........................................................................................................6
5.3 Example for MinTime/MaxTime logic .......................................................................................7
6. Important Maintenance Instruction....................................................................................................9

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1. Introduction
RA02C is a CO/temperature detector for Netvox Class-A devices based on the LoRaWAN open protocol and is compatible with
the LoRaWAN protocol.
LoRa Wireless Technology:
LoRa is a wireless communication technology famous for its long-distance transmission and low power consumption. Compared
with other communication methods, LoRa spread spectrum modulation technique greatly extend the communication distance. It
can be widely used in any use case that requires long-distance and low-data wireless communications. For example, automatic
meter reading, building automation equipment, wireless security systems, industrial monitoring. It has features like small size, low
power consumption, long transmission distance, strong 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
2 x 1.5V AAA size alkaline batteries
CO and temperature detection
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 the 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 various types of batteries in different configurations.
Indicator
Function Key
Test Key
Fixed Chassis
Battery Casing

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4. Set up Instruction
On/Off
Power on Insert batteries. (Users may need a screwdriver to open the cover)
Turn on Press any function key to turn on the device.
After releasing the key, the red and green indicators
will flash at the same time to indicate that it turns on successfully.
Turn off (Restore to factory setting) Press and hold both keys for 5 seconds till the green indicator flashes and then release;
LED flashes quickly 20 times.
Power off Remove Batteries.
Note:
1. After remove and insert the battery, the device memorizes previous on/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. Do not power on the device while any function key is pressed, otherwise the device will enter
the 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
Fail to join the network Suggest to check the device verification information on the gateway or consult your platform
server provider.
Function Key and Test Key
Press and hold both keys for 5
seconds
Restore to factory setting / Turn off
The green indicator flashes 20 times: success
The green indicator remains off: fail
Press function key 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
Press test key once
The device is in the network: The buzzer alarms for 5 seconds, the red indicator flashes 5 times,
and sends a report
The device is not in the network: green indicator remains off

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Sleeping Mode
The device is on and in the
network
Sleeping period: Min Interval.
When the reportchange exceeds setting value or the state changes, a data report will be sent
according to Min Interval.
Low Voltage Warning
Low Voltage Threshold 2.4V
5. Data Report
The device will immediately send a version packet report and a data report.
Data will be reported by default setting before any configuration.
Default setting:
Max Interval = 0x0E10 (3600s)
Min Interval = 0x0E10 (3600s) (The voltage is detected every Min Interval by default.)
Battery Voltage Change: 0x01 (0.1V)
CO Trigger:
The CO concentration is sampled 30 seconds after the device is powered up, when the concentration is higher than 110 ppm,
the red indicator light flashes, the buzzer alarms and immediately sends a report (CO alarm bit is 1).
If the alarm continues, the report will be sent every 30 seconds. When the concentration drops below 110ppm, the flashing
end alarm will be stopped and an alarm will be sent to restore the report.
High TemperatureAlarm:
After the device is successfully connected to the network, the temperature will be sampled once every 1 minute.
When the temperature is higher than 60°C, the buzzer will alarm, the red indicator will flash, and a report will be sent
immediately. (The fire alarm bit is 1.)
If the alarm continues, the report will be sent every 1 minute. When the temperature below 60°C, the flashing end alarm will
be stopped and an alarm will be sent to restore the report. (The fire alarm bit is 0.)
Note:
(1) The device report interval will be programmed based on the default firmware.
(2) The interval between two reports must be the minimum time.
The reported data is decoded by the Netvox LoRaWAN Application Command document and
http://cmddoc.netvoxcloud.com/cmddoc

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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
RA02C 0x11 0x01 Battery
(1Byte, unit:0.1V)
CO Alarm (1Byte)
0:no alarm 1:alarm
HighTempAlarm (1Byte)
0:noalarm 1:alarm
Reserved
(5Bytes,fixed 0x00)
Example of Uplink: 0111011C01010000000000
1st byte (01): Version
2nd byte (11): DeviceType 0x11－RA02C
3rd byte (01): ReportType
4th byte (1C): Battery－2.8v , 1C Hex=28 Dec 28*0.1v=2.8v
5th byte (01): CO Alarm
6th byte (01): High Temperature Alarm
7th ~ 11th byte (0000000000): 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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(1)Command Configuration:
MinTime = 1min, MaxTime = 1min, BatteryChange = 0.1v
Downlink: 0111003C003C0100000000 003C(Hex) = 60(Dec)
Response: 8111000000000000000000 (Configuration success)
8111010000000000000000 (Configuration failure)
(2)Read Configuration:
Downlink: 0211000000000000000000
Response: 8211003C003C0100000000 (Current configuration)
5.3 Example for MinTime/MaxTime logic
Example#1 based on MinTime = 1 Hour, MaxTime= 1 Hour, Reportable Change i.e. BatteryVoltageChange=0.1V
Max Time Max Time
Sleeping (Min Time) Sleeping (Min Time)
1H 2H 3H
Note:
MaxTime=MinTime. Data will only be report according to MaxTime (MinTime) duration regardless BatteryVoltageChange value.
Description Device CmdID
Device
Type
NetvoxPayLoadData
Config
ReportReq
RA02C
0x01
0x11
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)
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 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 change value 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.
Wakes up and
collects data
2.8V
Does not report
Wakes up and
collects data
REPORTS 2.8V
Wakes up and
collects data
REPORT 2.8V
Wakes up and
collects data
REPORTS
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
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
REPORTS
2.7V
Wakes up and
collects data
2.8V
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
2.8V
Does not report

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6. 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.