netvox RA08B Series User manual

Wireless Multifunction CO2Sensor
RA08B Series
Wireless Multifunction CO2Sensor
RA08B Series
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.

2
Table of Contents
1. Introduction........................................................................................................3
2. Appearance.........................................................................................................4
3. Features ..............................................................................................................5
4. Set-up Instruction...............................................................................................5
4.1 On/Off.........................................................................................................5
4.2 Network Joining .........................................................................................5
4.3 Function Key..............................................................................................6
4.4 Sleeping Mode............................................................................................6
4.5 Low Voltage Warning.................................................................................6
5. Data Report ........................................................................................................7
5.1 Example of ReportDataCmd......................................................................8
5.2 Example of ConfigureCmd ......................................................................12
5.3 ReadBackUpData.....................................................................................14
5.4 Example of GlobalCalibrateCmd.............................................................15
5.5 Set/GetSensorAlarmThresholdCmd.........................................................17
5.6 Set/GetNetvoxLoRaWANRejoinCmd......................................................18
6. Information about Battery Passivation ............................................................19
6.1 To determine whether a battery requires activation.................................19
6.2 How to activate the battery.......................................................................19
7. CO2Sensor Calibration....................................................................................20
8. Important Maintenance Instructions ................................................................21

3
1. Introduction
RA08B series is a Class A device based on LoRaWAN open protocol. It could be used for temperature, CO2, PIR, air pressure,
illuminance, TVOC, and NH3/H2S detection. Data collected by sensors would be shown on the E-ink display. Users are able to know the
data through one quick peek.
RA08B series and sensors configuration:
Model
Sensor
Note
(1)
T/H
(2)
TVOC
(3)
Light
(4)
Pressure
(5)
PIR
(6)
CO2
(7)
NH3+H2S
1. Weather monitoring:
humidity/illuminance/pressure sensor
2. Air quality detection: TVOC/CO2 sensor
3. PIR + E-ink display
(refresh data as people pass by)
4. NH3+H2S detection: monitor toilet smell
RA08B01
✓
✓
✓
✓
✓
✓
Standard (support 6 sensors)
RA08B02
✓
✓
✓
✓
Simple (Energy-saving.)
(only report 2 payloads compared to standard
configuration)
RA08B03
✓
✓
✓
✓
✓
✓
✓
Standard + NH3+H2S (support 7 sensors)
RA08B04
✓
✓
✓
✓
Simple (Energy-saving.)
(only report 2 payloads compared to standard
configuration)
LoRa Wireless Technology:
LoRa is a wireless communication technology that adopts techniques such as long-distance communication and low power
consumption. Compared with other communication methods, LoRa spread-spectrum modulation techniques greatly expand the
communication distance. It is used in long-distance and low-data wireless communications like automatic meter reading, building
automation equipment, wireless security systems, and industrial monitoring control system. The features include small size, low
power consumption, long transmission distance, and anti-interference ability.
LoRaWAN:
LoRaWAN built LoRa’s end-to-end standards and techniques, ensuring interoperability between devices and gateways from different
manufacturers.

4
2. Appearance
PIR
Light Sensor
Indicator
Function Key
E-ink Display
Mounting Bracket

5
3. Features
⚫SX1262 wireless communication module.
⚫4 ER14505 battery in parallel (AA size 3.6V for each battery)
⚫Temperature/Humidity, CO2, PIR, air pressure, illuminance, TVOC, and NH3/H2S detection.
⚫Compatible with LoRaWANTM Class A device.
⚫Frequency hopping spread spectrum.
⚫Support third-party platforms: Actility/ThingPark, TTN, MyDevices/Cayenne
⚫Low-power design for longer battery life
Note: Please refer to http://www.netvox.com.tw/electric/electric_calc.html for battery life calculation and other detailed information
4. Set-up Instruction
4.1 On/Off
Power on
Insert batteries. (Users may need a screwdriver to open battery cover.)
Turn on
Press and hold the function key for 3 seconds until the green indicator flashes.
Turn off
Press and hold the function key for 5 seconds until green indicator flashes once.
Then release the function key. The device will automatically shut down after the indicator flashes 10
times.
Reset to factory setting
Press and hold the function key for 10 seconds until green indicator flashes fast for 20 times.
The device will reset to factory setting and automatically shut down.
Power off
Remove Batteries.
Note
1. When user removes and inserts the battery; the device should be off by default.
2. 5 seconds after power on, the device will be in engineering test mode.
3. On/off interval is suggested to be about 10 seconds to avoid the interference of capacitor inductance
and other energy storage components.
4.2 Network Joining
Never joined 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
(without factory resetting)
Turn on the device to search 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
Please check the device verification information on the gateway or consult your platform server
provider.

6
4.3 Function Key
Press and hold for 5
seconds
Turn off
Long press the function key for 5 seconds and the green indicator flashes once.
Release the function key and the green indicator flashes 10 times.
The green indicator remains off: Fail
Press and hold for 10
seconds
Reset to factory setting / Turn off
The green indicator flashes 20 times: Success
Long press the function key for 5 seconds the green indicator flash once.
Keep pressing the function key for more than 10 seconds, the green indicator flashes 20 times.
The green indicator remains off: Fail
Short press
The device is in the network: green indicator flashes once, screen refreshes once, and send a data report
The device is not in the network: screen refreshes once and the green indicator remains off
Note
User should wait at least 3 seconds to press the function key again or it would not work properly.
4.4 Sleeping Mode
The device is on and in the
network
Sleeping period: Min Interval.
When the reportchange exceeds the setting value or the state changes, the device will send a data report
based on the Min Interval.
The device is on but not in
the network
1. Please remove the batteries when the device is not in use.
2. Please check the device verification information on the gateway.
4.5 Low Voltage Warning
Low Voltage
3.2 V

7
5. Data Report
After power on, the device would refresh the information on the screen and send a version packet report along with an uplink packet.
The device sends data based on the default configuration when no configuration is done.
Please do not send commands without turning on the device.
Default Setting:
Max Interval: 0x0708 (1800s)
Min Interval: 0x0708 (1800s) // The Max and Min Interval shall not be less than 180s.
IRDisableTime: 0x001E (30s)
IRDectionTime: 0x012C (300s)
CO2:
(1) Fluctuation of CO2 data caused by delivery and storage time could be calibrated.
(2) Please refer to 5.2 Example of ConfigureCmd and 7. CO2Sensor Calibration for detailed information.
TVOC:
(1) Two hours after power on, the data sent by TVOC sensor are for reference only.
(2) If the data is way higher or below the setting, the device should be placed in the environment with fresh air in 24 to 48 hours
until the data is back to normal value.
(3) TVOC level:
Very good
< 150 ppm
Good
150-500 ppm
Medium
500-1500 ppm
Poor
1500-5000 ppm
Bad
> 5000 ppm
Data Shown on the E-Ink Display:
The information shown on the screen is based on user’s choice of sensor. It would be refreshed by pressing the function key,
triggering the PIR, or refreshed based on the report interval.
// FFFF of reported data and “—” on the screen means the sensors are turning on, disconnection, and errors of sensors.
Data Collecting and Transmission:
(1)Join the network:
Press the function key (indicator flashes once) / trigger PIR, read data, refresh screen, report detected data (based on the report
interval)

8
(2)Without joining the network:
Press the function key / trigger PIR to get data and refresh the information on the screen.
//ACK = 0x00 (OFF), interval of data packets = 10s;
//ACK = 0x01 (ON), interval of data packets = 30s (cannot be configured)
Note: Please refer Netvox LoRaWAN Application Command document and Netvox Lora Command Resolver
http://www.netvox.com.cn:8888/cmddoc to resolve uplink data.
Data report configuration and sending period are as follows:
Min. Interval
(Unit: second)
Max. Interval
(Unit: second)
Detection Interval
Report Interval
180 –65535
180 –65535
MinTime
Exceed the setting value: report based on the
MinTime or the MaxTime interval
5.1 Example of ReportDataCmd
FPort: 0x06
Bytes
1 Byte
1 Byte
1 Byte
Var (Fix = 8 Bytes)
Version
DevieType
ReportType
NetvoxPayLoadData
Version–1 bytes –0x01——the Version of NetvoxLoRaWAN Application Command Version
DeviceType–1 byte –Device Type of Device
The devicetype is listed in Netvox LoRaWAN Application Devicetype V1.9.doc
ReportType –1 byte–The presentation of the Netvox PayLoad Data,according the device type
NetvoxPayLoadData–Fixed bytes (Fixed =8bytes)
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=0xA0, binary=1010 0000, if bit 7= 1, it means low voltage.
The actual voltage is 0010 0000 = 0x20 = 32, 32*0.1v =3.2v
2. Version Packet:
When Report Type=0x00 is the version packet, such as 01A0000A01202307030000, the firmware version is 2023.07.03.
3. Data Packet:
When Report Type=0x01 is data packet.
(If the device data exceeds 11 bytes or there are shared data packets, the Report Type will have different values.)
4. Signed Value:
When the temperature is negative, 2's complement should be calculated.

9
Device
Device
Type
Report
Type
NetvoxPayLoadData
RA08B
Series
0xA0
0x01
Battery
(1Byte, unit:0.1V)
Temperature
(Signed 2Bytes,
unit:0.01°C)
Humidity
(2Bytes, unit:0.01%)
CO2
(2Byte, 1ppm)
Occupy (1Byte)
0: Un Occupy
1: Occupy)
0x02
Battery
(1Byte, unit:0.1V)
AirPressure (4Bytes,
unit:0.01hPa)
Illuminance
(3Bytes, unit:1Lux)
0x03
Battery
(1Byte, unit:0.1V)
PM2.5
(2Bytes, Unit:1 ug/m3)
PM10
(2Bytes, Unit: 1ug/m3)
TVOC
(3Bytes, Unit:1ppb)
0x05
Battery
(1Byte, unit:0.1V)
ThresholdAlarm(4Bytes)
Bit0: TemperatureHighThresholdAlarm,
Bit1: TemperatureLowThresholdAlarm,
Bit2: HumidityHighThresholdAlarm,
Bit3: HumidityLowThresholdAlarm,
Bit4: CO2HighThresholdAlarm,
Bit5: CO2LowThresholdAlarm,
Bit6: AirPressure HighThresholdAlarm,
Bit7: AirPressure LowThresholdAlarm,
Bit8: illuminanceHighThresholdAlarm,
Bit9: illuminanceLowThresholdAlarm,
Bit10: PM2.5HighThresholdAlarm,
Bit11: PM2.5LowThresholdAlarm,
Bit12: PM10HighThresholdAlarm,
Bit13: PM10LowThresholdAlarm,
Bit14: TVOCHighThresholdAlarm,
Bit15: TVOCLowThresholdAlarm,
Bit16: HCHOHighThresholdAlarm,
Bit17: HCHOLowThresholdAlarm,
Bit18:O3HighThresholdAlarm,
Bit19: O3LowThresholdAlarm,
Bit20:COHighThresholdAlarm,
Bit21: COLowThresholdAlarm,
Bit22-31: Reserved
Reserved
(3Byte,fixed 0x00)
0x06
Battery
(1Byte, unit:0.1V)
H2S
(2Bytes,Unit:0.01ppm)
NH3
(2Bytes,Unit:0.01ppm)
Reserved
(3Byte,fixed 0x00)

10
Uplink:
Data #1: 01A0019F097A151F020C01
1st byte (01): Version
2nd byte (A0): DeviceType 0xA0 －RA08B Series
3rd byte (01): ReportType
4th byte (9F): Battery－3.1V (Low Voltage) Battery=0x9F, binary=1001 1111, if bit 7= 1, it means low voltage.
The actual voltage is 0001 1111 = 0x1F = 31, 31*0.1v =3.1v
5th 6th byte(097A): Temperature－24.26℃, 97A (Hex)= 2426 (Dec), 2426*0.01℃= 24.26℃
7th 8th byte(151F): Humidity－54.07%, 151F (Hex) = 5407 (Dec), 5407*0.01% = 54.07%
9th 10th byte(020C): CO2－524ppm , 020C (Hex) = 524 (Dec), 524*1ppm = 524 ppm
11th byte(01): Occupy－1
Data #2 01A0029F0001870F000032
1st byte (01): Version
2nd byte (A0): DeviceType 0xA0 －RA08B Series
3rd byte (02): ReportType
4th byte(9F): Battery－3.1V (Low Voltage) Battery=0x9F, binary=1001 1111, if bit 7= 1, it means low voltage.
The actual voltage is 0001 1111 = 0x1F = 31, 31*0.1v =3.1v
5th-8th byte (0001870F): Air Pressure－1001.11hPa, 001870F (Hex) = 100111 (Dec), 100111*0.01hPa = 1001.11hPa
9th-11th byte (000032): illuminance－50Lux, 000032 (Hex) = 50 (Dec), 50*1Lux = 50Lux
Data #3 01A0039FFFFFFFFF000007
1st byte (01): Version
2nd byte (A0): DeviceType 0xA0 －RA08B Series
3rd byte (03): ReportType
4th byte (9F): Battery－3.1V (Low Voltage) Battery=0x9F, binary=1001 1111, if bit 7= 1, it means low voltage.
The actual voltage is 0001 1111 = 0x1F = 31, 31*0.1v =3.1V
5th-6th (FFFF): PM2.5 －NAug/m3
7th-8th byte (FFFF): PM10 －NAug/m3
9th-11th byte(000007): TVOC－7ppb, 000007 (Hex) = 7 (Dec), 7*1ppb = 7ppb
Note: FFFF refers to unsupported detection item or errors.

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Data #5 01A0059F00000001000000
1st byte (01): Version
2nd byte (A0): DeviceType 0xA0 －RA08B Series
3rd byte (05): ReportType
4th byte (9F): Battery－3.1V (Low Voltage) Battery=0x9F, binary=1001 1111, if bit 7= 1, it means low voltage.
The actual voltage is 0001 1111 = 0x1F = 31, 31*0.1v =3.1v
5th-8th (00000001): ThresholdAlarm－1 = 00000001(binary), bit0 = 1 (TemperatureHighThresholdAlarm)
9th-11th byte (000000): Reserved
Data #6 01A0069F00030000000000
1st byte (01): Version
2nd byte (A0): DeviceType 0xA0 －RA08B Series
3rd byte (06): ReportType
4th byte (9F): Battery－3.1V (Low Voltage) Battery=0x9F, binary=1001 1111, if bit 7= 1, it means low voltage.
The actual voltage is 0001 1111 = 0x1F = 31, 31*0.1v =3.1v
5th-6th (0003): H2S－0.03ppm, 3 (Hex) = 3 (Dec), 3* 0.01ppm = 0.03ppm
7th-8th (0000): NH3－0.00ppm
9th-11th byte (000000): Reserved

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5.2 Example of ConfigureCmd
FPort: 0x07
Description
Device
CmdID
DeviceType
NetvoxPayLoadData
Config
ReportReq
RA08B
Series
0x01
0xA0
MinTime
(2bytes Unit:s)
MaxTime
(2bytes Unit:s)
Reserved
(2Bytes,Fixed 0x00)
Config
ReportRsp
0x81
Status
(0x00_suA0ess)
Reserved (8Bytes,Fixed 0x00)
ReadConfig
ReportReq
0x02
Reserved (9Bytes,Fixed 0x00)
ReadConfig
ReportRsp
0x82
MinTime
(2bytes Unit:s)
MaxTime
(2bytes Unit:s)
Reserved
(2Bytes,Fixed 0x00)
Calibrate
CO2Req
0x03
CalibrateType (1Byte,
0x01_TargetCalibrate,
0x02_ZeroCalibrate,
0x03_BackgroudCalibrate,
0x04_ABCCalibrate)
CalibratePoint
(2Bytes,Unit:1ppm)
Only valid in
targetCalibrateType
Reserved
(6Bytes,Fixed 0x00)
Calibrate
CO2Rsp
0x83
Status
(0x00_suA0ess)
Reserved (8Bytes,Fixed 0x00)
SetIRDisable
TimeReq
0x04
IRDisableTime
(2bytes Unit:s)
IRDectionTime
(2bytes Unit:s)
Reserved
(5Bytes,Fixed 0x00)
SetIRDisable
TimeRsp
0x84
Status (0x00_success)
Reserved (8Bytes,Fixed 0x00)
GetIRDisable
TimeReq
0x05
Reserved (9Bytes,Fixed 0x00)
GetIRDisable
TimeRsp
0x85
IRDisableTime
(2bytes Unit:s)
IRDectionTime
(2bytes Unit:s)
Reserved
(5Bytes,Fixed 0x00)
(1) Configure device parameters
MinTime = 1800s (0x0708), MaxTime = 1800s (0x0708)
Downlink: 01A0070807080000000000
Response:
81A0000000000000000000 (Configuration success)
81A0010000000000000000 (Configuration failure)
(2) Read device configuration parameters
Downlink: 02A0000000000000000000
Response: 82A0070807080000000000 (Current configuration)

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(3) Calibrate CO2sensor parameters
Downlink:03A00103E8000000000000 // Choose Target-calibrations
(calibrate as the CO2 level reaches 1000ppm) (CO2 level could be configured)
03A0020000000000000000 //Choose Zero-calibrations (calibrate as the CO2 level is 0ppm)
03A0030000000000000000 //Choose Background-calibrations (calibrate as the CO2 level is 400ppm)
03A0040000000000000000 //Choose ABC-calibrations
(Note: The device would auto-calibrate as it turns on. The interval of auto-calibration
would be 8 days. The device shall be exposed to the environment with fresh air at least 1
time to ensure the accuracy of the results.)
Response:
83A0000000000000000000 (Configuration success) // (Target/Zero/Background/ABC-calibrations)
83A0010000000000000000 (Configuration failure) // After calibration, the CO2level exceeds the accuracy range.
(4) SetIRDisableTimeReq
Downlink: 04A0001E012C0000000000 //IRDisableTime: 0x001E=30s, IRDectionTime: 0x012C=300s
Response: 84A0000000000000000000 (Current configuration)
(5) GetIRDisableTimeReq
Downlink: 05A0000000000000000000
Response: 85A0001E012C0000000000 (Current configuration)

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5.3 ReadBackUpData
FPort: 0x12
Description
CmdID
PayLoad
ReadBackUpDataReq
0x01
Index (1Byte)
ReadBackUpDataRsp
WithOutData
0x81
None
ReadBackUpDataRsp
WithDataBlock
0x91
Temperature
(Signed2Bytes,
unit: 0.01°C)
Humidity
(2Bytes,
unit:0.01%)
CO2
(2Byte, 1ppm)
Occupy
(1Byte 0:Un Occupy
1: Occupy)
illuminance
(3Bytes, unit:1Lux)
ReadBackUpDataRsp
WithDataBlock
0x92
AirPressure
(4Bytes,unit:0.01hPa)
TVOC
(3Bytes, Unit:1ppb)
Reserved
(3Bytes,fixed 0x00)
ReadBackUpDataRsp
WithDataBlock
0x93
PM2.5(2Bytes,
Unit: 1 ug/m3)
PM10
(2Bytes,
Unit:1ug/m3)
HCHO
(2Bytes,
unit:1ppb)
O3
(2Bytes,
unit:0.1ppm)
CO
(2Bytes, unit:0.1ppm)
Uplink
Data #1 91099915BD01800100002E
1st byte (91): CmdID
2nd- 3rd byte (0999): Temperature1－24.57°C, 0999 (Hex) = 2457 (Dec), 2457 * 0.01°C = 24.57°C
4th-5th byte (15BD): Humidity－55.65%, 15BD (Hex) = 5565 (Dec), 5565 * 0.01% = 55.65%
6th-7th byte (0180): CO2－384ppm, 0180 (Hex) = 384 (Dec), 384 * 1ppm = 384ppm
8th byte (01): Occupy
9th-11th byte (00002E): illuminance1－46Lux, 00002E (Hex) = 46 (Dec), 46 * 1Lux = 46Lux
Data #2 9200018C4A000007000000
1st byte (92): CmdID
2nd- 5th byte (00018C4A): AirPressure－1014.50hPa, 00018C4A (Hex) = 101450 (Dec), 101450 * 0.01hPa = 1014.50hPa
6th-8th byte (000007): TVOC－7ppb, 000007(Hex)=7(Dec),7*1ppb=7ppb
9th-11th byte (000000): Reserved
Data #3 93FFFFFFFFFFFFFFFFFFFF
1st byte (93): CmdID
2nd- 3rdbyte (FFFF): PM2.5－FFFF(NA)
4th-5th byte (FFFF): PM10－FFFF(NA)
6th-7th byte (FFFF): HCHO－FFFF(NA)
8th-9th byte (FFFF): O3－FFFF(NA)
10th-11th byte (FFFF): CO－FFFF(NA)

15
5.4 Example of GlobalCalibrateCmd
FPort: 0x0E
Description
CmdID
Sensor
Type
PayLoad(Fix =9 Bytes)
SetGlobalCalibrateReq
0x01
See
below
Channel (1Byte)
0_Channel1
1_Channel2, etc
Multiplier
(2bytes,
Unsigned)
Divisor
(2bytes,
Unsigned)
DeltValue
(2bytes,
Signed)
Reserved
(2Bytes,
Fixed 0x00)
SetGlobalCalibrateRsp
0x81
Channel (1Byte)
0_Channel1
1_Channel2,etc
Status
(1Byte, 0x00_success)
Reserved
(7Bytes,Fixed 0x00)
GetGlobalCalibrateReq
0x02
Channel (1Byte)
0_Channel1
1_Channel2,etc
Reserved (8Bytes,Fixed 0x00)
GetGlobalCalibrateRsp
0x82
Channel (1Byte)
0_Channel1
1_Channel2,etc
Multiplier
(2bytes,
Unsigned)
Divisor
(2bytes,
Unsigned)
DeltValue
(2bytes,
Signed)
Reserved
(2Bytes,
Fixed 0x00)
ClearGlobalCalibrateReq
0x03
Reserved 10Bytes,Fixed 0x00)
ClearGlobalCalibrateRsp
0x83
Status(1Byte,0x00_success)
Reserved (9Bytes,Fixed 0x00)
SensorType - byte
0x01_Temperature Sensor
0x02_Humidity Sensor
0x03_Light Sensor
0x06_CO2 Sensor
0x35_Air PressSensor
(1) SetGlobalCalibrateReq
A. Calibrate the RA08B Series CO2sensor by increasing 100ppm.
SensorType: 0x06; Channel: 0x00; Multiplier: 0x0001; Divisor: 0x0001; DeltValue: 0x0064
Downlink: 0106000001000100640000
Response: 8106000000000000000000
B. Calibrate the RA08B Series CO2 sensor by decreasing 100ppm.
SensorType: 0x06; Channel: 0x00; Multiplier: 0x0001; Divisor: 0x0001; DeltValue: 0xFF9C
SetGlobalCalibrateReq:
Downlink: 01060000010001FF9C0000
Response: 8106000000000000000000
Channel - byte
0x00_ CO2
0x01_ Temperature
0x02_ Humidity
0x03_ Light
0x04_ Air press

16
(2) GetGlobalCalibrateReq
A. Downlink: 0206000000000000000000
Response:8206000001000100640000
B. Downlink: 0206000000000000000000
Response: 82060000010001FF9C0000
(3) ClearGlobalCalibrateReq:
Downlink: 0300000000000000000000
Response: 8300000000000000000000

17
5.5 Set/GetSensorAlarmThresholdCmd
FPort: 0x10
CmdDescriptor
CmdID
(1Byte)
Payload (10Bytes)
SetSensorAlarm
ThresholdReq
0x01
Channel(1Byte,
0x00_Channel1,
0x01_Channel2,
0x02_Channel3,etc)
SensorType (1Byte,
0x00_Disable ALL
SensorthresholdSet
0x01_Temperature,
0x02_Humidity,
0x03_CO2,
0x04_AirPressure,
0x05_illuminance,
0x06_PM2.5,
0x07_PM10,
0x08_TVOC,
0x09_HCHO,
0x0A_O3
0x0B_CO,
SensorHighThreshold
(4Bytes,Unit:same as
reportdata in fport6,
0Xffffffff_DISALBLE
rHighThreshold)
SensorLowThreshold
(4Bytes,Unit:same as
reportdata in fport6,
0Xffffffff_DISALBLEr
HighThreshold)
SetSensorAlarm
ThresholdRsp
0x81
Status
(0x00_success)
Reserved
(9Bytes,Fixed 0x00)
GetSensorAlarm
ThresholdReq
0x02
Channel(1Byte,
0x00_Channel1,
0x01_Channel2,
0x02_Channel3,etc)
SensorType
(1Byte,Same as the
SetSensorAlarmThresholdReq’s
SensorType)
Reserved
(8Bytes,Fixed 0x00)
GetSensorAlarm
ThresholdRsp
0x82
Channel(1Byte,
0x00_Channel1,
0x01_Channel2,
0x02_Channel3,etc)
SensorType
(1Byte,Same as the
SetSensorAlarmThresholdReq’s
SensorType)
SensorHighThreshold
(4Bytes,Unit:same as
reportdata in fport6,
0Xffffffff_DISALBLE
rHighThreshold)
SensorLowThreshold
(4Bytes,Unit:same as
reportdata in fport6,
0Xffffffff_DISALBLEr
HighThreshold)
Default: Channel = 0x00 (cannot be configured)
(1) Set the temperature HighThreshold as 40.05℃and LowThreshold as 10.05℃
SetSensorAlarmThresholdReq: (when the temperature is higher than the HighThreshold or lower than the LowThreshold, the device
would upload reporttype = 0x05)
Downlink: 01000100000FA5000003ED // 0FA5 (Hex) = 4005 (Dec), 4005*0.01°C = 40.05°C,
03ED (Hex) = 1005 (Dec), 1005*0.01°C = 10.05°C
Response: 810001000000000000000000

18
(2) GetSensorAlarmThresholdReq
Downlink: 0200010000000000000000
Response:82000100000FA5000003ED
(3) Disable all sensor thresholds. (Configure the Sensor Type to 0)
Downlink: 0100000000000000000000
Device returns: 8100000000000000000000
5.6 Set/GetNetvoxLoRaWANRejoinCmd
(To check if the device is still in the network. If the device is disconnected, it will automatically rejoin back to the network.)
FPort: 0x20
CmdDescriptor
CmdID(1Byte)
Payload(5Bytes)
SetNetvoxLoRaWANRejoinReq
0x01
RejoinCheckPeriod(4Bytes,Unit:1s
0XFFFFFFFF Disable
NetvoxLoRaWANRejoinFunction)
RejoinThreshold(1Byte)
SetNetvoxLoRaWANRejoinRsp
0x81
Status(1Byte,0x00_success)
Reserved (4Bytes,Fixed 0x00)
GetNetvoxLoRaWANRejoinReq
0x02
Reserved (5Bytes,Fixed 0x00)
GetNetvoxLoRaWANRejoinRsp
0x82
RejoinCheckPeriod(4Bytes,Unit:1s)
RejoinThreshold(1Byte)
Note:
(a) Set RejoinCheckThreshold as 0xFFFFFFFF to stop the device from rejoining the network.
(b) The last configuration would be kept as users reset the device back to the factory setting.
(c) Default setting: RejoinCheckPeriod = 2 (hr) and RejoinThreshold = 3 (times)
1. Configure device parameters
RejoinCheckPeriod = 60min (0xE10), RejoinThreshold = 3 times (0x03)
Downlink: 0100000E1003
Response: 810000000000 (configuration success)
810100000000 (configuration fail)
2. Read configuration
Downlink: 020000000000
Response: 8200000E1003

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6. 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 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:
6.1 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.
6.2 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
Battery activation time, activation current, and load resistance may vary due to the manufacturers. Users
should follow the manufacturer's instructions before activating the battery.
Note:
(a) Please do not disassemble the device unless it is required to replace the batteries.
(b) Do not move the waterproof gasket, LED indicator light, and function keys when replacing the batteries.
(c) Please use a suitable screwdriver to tighten the screws. If using an electric screwdriver, user should set the torque as 4kgf to
ensure the device is impermeable.
(d) Please do not dissemble the device with little understanding of the device’s internal structure.
(e) The waterproof membrane stops liquid water from passing into the device. However, it does not contain a water vapor barrier. To
prevent water vapor from condensing, the device should not be used in an environment that is highly humid or full of vapor.

20
7. CO2Sensor Calibration
(1) Target Calibration
Target concentration calibration assumes that sensor is put into a target environment with a known CO2concentration. A target
concentration value must be written to Target calibration register.
(2) Zero Calibration
Zero-calibrations are the most accurate recalibration routine and are not at all affected performance-wise by having an available
pressure sensor on host for accurate pressure-compensated references.
A zero-ppm environment is most easily created by flushing the optical cell of the sensor module and filling up an encapsulating
enclosure with nitrogen gas, N2, displacing all previous air volume concentrations. Another less reliable or accurate zero reference
point can be created by scrubbing an airflow using e.g. Soda lime.
(3) Background Calibration
A "fresh air" baseline environment is by default 400ppm at normal ambient atmospheric pressure by sea level. It can be referenced in
a crude way by placing the sensor in direct proximity to outdoor air, free of combustion sources and human presence, preferably
during either by open window or fresh air inlets or similar. Calibration gas by exactly 400ppm can be purchased and used.
(4) ABC Calibration
The Automatic Baseline Correction algorithm is a proprietary Senseair method for referencing to "fresh air" as the lowest, but
required stable, CO2-equivalent internal signal the sensor has measured during a set time period. This time period by default is
180hrs and can be changed by the host, it's recommended to be something like an 8 day period as to catch low-occupancy and other
lower-emission time periods and favourable outdoor wind-directions and similar which can plausibly and routinely expose the
sensor to the most true fresh air environment.
If such an environment can never be expected to occur, either by sensor locality or ever-presence of CO2emission sources, or
exposure to even lower concentrations than the natural fresh air baseline, then ABC recalibration can't be used.
In each new measurement period, the sensor will compare it to the stored one at the ABC parameters registers, and if new values
show a lower CO2-equivalent raw signal while also in a stable environment, the reference is updated with these new values.
The ABC algorithm also has a limit on how much it is allowed to change the baseline correction offset with, per each ABC cycle,
meaning that self-calibrating to adjust to bigger drifts or signal changes may take more than one ABC cycle.