W W W . E L I C H E N S . C O M
User manual – LoRaWAN CO2
sensor
Page 2 of 30
User manual – LoRaWAN CO2 sensor
This document is the property of eLichens SA and may not be
reproduced or communicated without its permission.
[CONFIDENTIAL]
1. Introduction .......................................................................................................... 3
2. Features ............................................................................................................... 4
3. Specifications ....................................................................................................... 5
4. Aura-CO2 at a glance .......................................................................................... 9
5. Smiley Mode ...................................................................................................... 10
6. Power Saving Mode ........................................................................................... 10
7. Configuration ...................................................................................................... 11
8. Station settings .................................................................................................. 14
9. Station settings .................................................................................................. 20
10. Station Location .............................................................................................. 21
11. ICONE Index................................................................................................... 22
12. Station Fixation ............................................................................................... 24
13. Maintenance ................................................................................................... 26
14. LoRaWAN Frames .......................................................................................... 26
15. Web data access ............................................................................................ 27
16. Upgrade Firmware .......................................................................................... 28
17. Data Update.................................................................................................... 30
For more information, please contact us:.................................................................. 30
Page 3 of 30
User manual – LoRaWAN CO2 sensor
This document is the property of eLichens SA and may not be
reproduced or communicated without its permission.
[CONFIDENTIAL]
1. Introduction
Aura-CO2 is a five+ year battery-operated connected CO2 monitor measuring in real
time carbon dioxide concentration, temperature, pressure and relative humidity.
Data is displayed on a large e-Paper screen and on the online dashboard when Aura-
CO2 is connected to the LoRaWAN network. End users can customize sound & visual
alarms through the eLichens Aura smartphone application.
Aura-CO2 is including the 20+ years lifetime eLichens Foxberry CO2 gas sensor, the
cutting-edge dual-channel NDIR (Non-dispersive Infrared) gas sensors integrated in a
small and compact form factor, based on eLichens’ patented technology including the
proprietary IR micro-source, patented optical design and advanced signal processing
algorithms. Using the auto-calibrated Foxberry gas sensor ultra-low power mode,
Aura-CO2 reaches more than 5 years on battery without recharging, maintenance or
calibration.
Studies showed that there is a relationship between the ambient CO2 level
and the need for air renewal. The CO2 level is linked to the number of people
in a room. The higher the level, the greater the risk of transmission of
pathogens and viruses such as coronavirus. Aura-CO2 alerts users when the
CO2 level is too high. By optimally adjusting the ventilation and air conditioning system,
the user can ensure good indoor air quality at all times and prevent the transmission
of pathogens. This reduces the risk of infection by diseases such as COVID-19.
Page 4 of 30
User manual – LoRaWAN CO2 sensor
This document is the property of eLichens SA and may not be
reproduced or communicated without its permission.
[CONFIDENTIAL]
2. Features
Product:
• CO2, ambiant temperature, relative humidity and atmoshperic pressure sensors.
• ePaper screen for a clear display of relevant information.
• Configurable visual and audible CO2 level alarms.
• LoRaWAN & Bluetooth Low Energy (BLE) connectivities.
• Compact size, wall mounted and battery powered for an easy installation.
• Maintenance free.
• More than 5 years run time without changing batteries.
• Aura CO2 can be installed on the wall and can be secured with the anti-theft mounting
base or freestanding on a table/desk.
Ecosystem:
• Easy configuration with our iOS and Android mobile application and BLE.
• Unlimited cloud storage, accessible through API and dashboards.
• Web and mobile data visualization applications.
Applications
• Indoor air quality monitoring for schools, offices, homes, stores, …
• Air purification control
• Demand control ventilation
• HVAC management
When the CO2 concentration alert level is exceeded, colors on the e-paper screen
are reversed to warn you.
Alarm
Mode :
CO2 level :
Unhealthy
Normal
Mode :
CO2 level :
Good
Page 5 of 30
User manual – LoRaWAN CO2 sensor
This document is the property of eLichens SA and may not be
reproduced or communicated without its permission.
[CONFIDENTIAL]
3. Specifications
Operating conditions
Environment
Indoor
Temperature range
0-50°C
Humidity range (1)
0-85%RH
Lifetime
>10 years
(1) Non-condensing
Power supply
Battery type
2 x 3.6V AA Lithium Batteries
Battery Lifetime (2)
>5 years
(2) Contact eLichens for replacement batteries.
Mechanical
Dimensions
92 x 60 x 30 mm3
Mounting options
Wall-mounted (anti-theft system option)
Stands on a flat surface table
Screen dimensions
73mm (2.9’’)
CO2 Sensor
Technology
eLichens Proprietary patented low-power NDIR
Measurement Range
400 - 5000ppm
Absolute Accuracy
±30ppm ±3% of reading
Output Resolution
10 ppm
Aura is equipped with Foxberry CO2 gas sensor, the eLichens best in class ultra-low
power NDIR sensor, already used by key players in HVAC, safety and industrial
markets. Foxberry sensors are designed to accurately monitor Air Quality over time
with ZERO drift through its innovative self-calibration system.
Temperature Sensor
Absolute Accuracy
±0.5°C at 25°C and ±1.0°C in the
full range
Output Resolution
0.1°C
Page 6 of 30
User manual – LoRaWAN CO2 sensor
This document is the property of eLichens SA and may not be
reproduced or communicated without its permission.
[CONFIDENTIAL]
Humidity sensor
Absolute Accuracy
±3% RH
Output Resolution
1% RH
Pressure sensor
Absolute Accuracy
±1 hPa
Output Resolution
1 hPa
LoRaWAN
Protocol version (3)
LoRaWAN 1.0.2
Device class
A
Features
OTAA, ADR, Adaptative Channel Setup
Regions
US (902-928 MHz)
EU (863-870 MHz)
AS (923 MHz)
Report interval (4)
Upload 4 measures every hour = one measure every
15 minutes
Payload
Status, CO2, Temperature, Humidity, Pressure,
Battery
(3) Disable by default. Activation via the app.
(4) User can modify LoRaWAN uplink rate from 5 minutes to 60 minutes. If AURA is disconnected from
LoRaWAN network, it will keep one measure every 15 minutes for 3 weeks.
With the LoRaWAN network, Aura is connected anywhere to the cloud, NO WIFI is
required.
Page 7 of 30
User manual – LoRaWAN CO2 sensor
This document is the property of eLichens SA and may not be
reproduced or communicated without its permission.
[CONFIDENTIAL]
Available services over Bluetooth Low Energy (BLE)
Protocol version
BLE V4.2
Services
• Activate / Deactivate LoRaWAN provisioning
• Get device information
• Get / display measures
• Set CO2 alarm threshold
• Enable / Disable audible alarm
• Synchronize date and time
• Set date format
• Set Temperature unit
• Launch a manual calibration procedure
• Upload 21 days of data to eLichens Cloud
• Upgrade Firmware
• Change LoRaWAN uplinks frequency
• Activate / Deactivate Power Saving Mode
• Restore sensor factory calibration
• Modify LED duration
• Modify LED blinking frequency
With BLE connectivity, Aura communicates directly with any Bluetooth connected
device and allows users to access settings. Please note every command sent through
BLE connectivity are also available within LoRaWAN downlinks.
Data Storage
On device
3 weeks, one measure every 15 minutes
Please note AURA-CO2 data are sent by LoRaWAN every hour (default configuration,
customizable by user).
e-Paper screen data refreshment
Above alarm threshold
1 minute
Below alarm threshold
1 minute
LED On Time
By default
200 ms
Custom(5)
0 .. 2000 ms
(5) Please note change LED On time will impact AURA autonomy
Page 8 of 30
User manual – LoRaWAN CO2 sensor
This document is the property of eLichens SA and may not be
reproduced or communicated without its permission.
[CONFIDENTIAL]
LED Blinking Frequency
By default
1 minute above alarm threshold
5 minutes below alarm threshold
Custom(5)
1 .. 120 min
(5) Please note change LED On time will impact AURA autonomy
Alarm Threshold
By default
1000 ppm
Custom
600 .. 2000 ppm
Page 9 of 30
User manual – LoRaWAN CO2 sensor
This document is the property of eLichens SA and may not be
reproduced or communicated without its permission.
[CONFIDENTIAL]
4. Aura-CO2 at a glance
Two AA Lithium batteries provide more than 5 years of autonomy to Aura-CO2. The
batteries are already installed, a short press on the user button and the device will
start. Air quality data will automatically be collected in the room and sent through the
LoRaWAN network.
Measures are updated every minute on screen. User can press the button to refresh
screen displayed measures.
One should press user button during around 10 seconds, until hearing two beeps.
One short press is enough to turn on the device.
Two touches on the user button display the serial number QR code, also in the back
cover. Two touches on the user button to go back to the former display.
Three touches on user button allow to change between PPM display Mode and
Smiley Display mode
Page 10 of 30
User manual – LoRaWAN CO2 sensor
This document is the property of eLichens SA and may not be
reproduced or communicated without its permission.
[CONFIDENTIAL]
5. Smiley Mode
Please note in this picture CO2 alarm threshold is set to 1000 ppm- changeable
by user
6. Power Saving Mode
Power saving mode allows AURA to increase battery lifetime. One can
activate/deactivate it within the mobile app. When activated, a “moon” and sleeping
icons “ ” appear on screen, display is not refreshed anymore, and LEDs doesn’t
blink from 8PM to 6AM and the whole Sunday (customizable). Data are still being
recorded and LoRaWAN uplinks sent.
Click
Changing mode
User must press 3 times the
button shortly (<1 second) to
swap from one mode to
another
Page 11 of 30
User manual – LoRaWAN CO2 sensor
This document is the property of eLichens SA and may not be
reproduced or communicated without its permission.
[CONFIDENTIAL]
7. Configuration
Configuration of the product can be performed thanks to a mobile application available
on Android and iOS. The links are hereafter, or it can be found by using the keywords
“eLichens aura”.
Note: Smartphone Bluetooth must be ON.
https://apps.apple.com/us/a
pp/aura-co2/id1565190899
https://play.google.com/store/apps
/details?id=com.elichens.auraco2
&gl=US
Page 12 of 30
User manual – LoRaWAN CO2 sensor
This document is the property of eLichens SA and may not be
reproduced or communicated without its permission.
[CONFIDENTIAL]
To use the mobile application, an account needs to be
created, or an existing eLichens account can be used.
When choosing a password, the following rules have to
be followed:
At least 8 characters
At least 1 lower case letter [a-z]
At least 1 upper case letter [A-Z]
At least 1 number [0-9]
At least 1 special character [$@$!%*#?&,;]
The account can be created directly on eLichens’ Cloud
too:
https://lab.elichens.com/register/
Station connection is performed through Bluetooth,
by selecting “Add a new station” on the “Stations”
screen.
After having selected “Add a new station”, Bluetooth
needs to be turned ON on the station. To do so, a
long press (>3 seconds) on the user button is
required. A short beep will be heard, and the
Bluetooth icon will be displayed on the station’s
screen.
Page 13 of 30
User manual – LoRaWAN CO2 sensor
This document is the property of eLichens SA and may not be
reproduced or communicated without its permission.
[CONFIDENTIAL]
(1) Station ID will display in the browse menu,
(2) Station pairing is performed (it can take up to 10 seconds),
(3) The settings page opens, allowing the user to configure the station.
Page 14 of 30
User manual – LoRaWAN CO2 sensor
This document is the property of eLichens SA and may not be
reproduced or communicated without its permission.
[CONFIDENTIAL]
8. Station settings
There are several ways to configure AURA CO2 presets. Either user can use existing
settings, or he can custom his configuration.
Page 15 of 30
User manual – LoRaWAN CO2 sensor
This document is the property of eLichens SA and may not be
reproduced or communicated without its permission.
[CONFIDENTIAL]
Default Configuration :
• Sleep mode is disabled
• LoRaWAN uplinks frequency is set to 60 minutes
• LEDs are set as follows:
o Green: blinks 0,1 second every 5 minutes
o Orange: blinks 0,1 second every 5 minutes
o Red: blinks 0,1 second every minute
• Alarm threshold is set to 1000 ppm
Applications :
• Air quality monitoring in offices, meeting room, shops, homes …
School Configuration :
• Sleep mode is activated
o Aura won’t display neither CO2 concentration nor smiley (see Power
Saving Mode) every working day from 7 PM to 7 AM, and the whole
Saturday and Sunday.
• LoRaWAN uplinks frequency is set to 60 minutes
• LEDs are set as follows:
o Green: blinks 0,2 seconds every 5 minutes
o Orange: blinks 0,7 seconds every 5 minutes
o Red: blinks 1 seconds every 5 minutes
• Alarm threshold is set to 1000 ppm
Applications :
• Air quality monitoring in schools, nurseries, kindergarten …
Monitoring Configuration:
• Sleep mode is disabled
• LoRaWAN uplinks frequency is set to 5 minutes
• LEDs are set as follows:
o Green: blinks 0,2 seconds every 5 minutes
o Orange: blinks 0,7 seconds every 5 minutes
o Red: blinks 1 seconds every minute
• Alarm threshold is set to 1000 ppm
Applications : Demand on control ventilation, building air quality monitoring, air
stuffiness diagnostic
Page 16 of 30
User manual – LoRaWAN CO2 sensor
This document is the property of eLichens SA and may not be
reproduced or communicated without its permission.
[CONFIDENTIAL]
Advanced Configuration
1. LoRaWAN configuration view :
a. Activate / Deactivate LoRaWAN reporting (1)
b. Get DevEUI
c. Change LoRaWAN uplinks frequency
2. CO2 alarm
a. Configure alarm threshold
b. Activate / deactivate buzzer
3. CO2 calibration
a. Activate / deactivate and set automatic calibration
b. Trig a manual calibration
c. Restore factory calibration settings
4. Configure hours and days when Aura goes to sleep
mode (see §Sleep Mode)
5. Change date and time display format. Change
temperature unit
6. LEDs configuration
a. Change LED On (from 0 second to 2 seconds)
b. Change blinking frequency (from 1 minute to 120
minutes)
c. These settings are appliable for every color, red,
orange and green
7. Activate / deactivate data recording (activate by default,
records up to 21 days of data with one measure every 15
minutes)
8. Device info
a. Get model name
b. Get Serial Number
c. Get Firmware version
d. Get Hardware version
e. Get manufacturer name
f. Get date and day number (1 for Monday, 2 for
Tuesday …)
(1) Activate / Deactivate LoRaWAN reporting is the equivalent to force
a LoRaWAN join request
1
2
3
4
5
6
7
8
Page 17 of 30
User manual – LoRaWAN CO2 sensor
This document is the property of eLichens SA and may not be
reproduced or communicated without its permission.
[CONFIDENTIAL]
Sleep mode
1. Start Hour: Hour when Aura will go to sleep
mode
2. End Hour: Hour when Aura will go out of sleep
mode
3. Start Minute: Minute when Aura goes to sleep
mode, following start hour
4. End Minute: Minute when Aura goes out of sleep
mode, following end hour.
5. Full Days: Aura goes to sleep mode the whole
day, from 0 AM to 11:59 PM
6. In this example, station goes to sleep mode:
• Every day from 8 PM to 6 AM
• Monday and Tuesday from 0 AM to 11:59
PM
Page 18 of 30
User manual – LoRaWAN CO2 sensor
This document is the property of eLichens SA and may not be
reproduced or communicated without its permission.
[CONFIDENTIAL]
CO2 calibration
8.6.1. Automatic Calibration
Automatic calibration is based on CO2 minimum values measured within
a week (by default, configurable by user). It is strongly advised to let
the automatic calibration process effective with a one-week
frequency.
8.6.2. Manual Calibration
Manual Calibration first need the user to let AURA station close to a fresh air,
where CO2 concentration is closed to CO2 Atmosphere baseline
concentration, around 400 ppm. Calibration algorithms use the 10 last minutes
of measured data. It is advised to:
• Either by placing AURA at outdoor air, during around 30 minutes
• Either by placing AURA closed to an opened window, during
around one hour (to be sure CO2 concentration decrease to 400
ppm)
• Either by placing AURA in a room properly ventilated without any
human or animal presence, during several hours (to be sure CO2
concentration decreases to 400 ppm)
If these conditions are not met, manual calibration will disturb sensor
values.
Page 19 of 30
User manual – LoRaWAN CO2 sensor
This document is the property of eLichens SA and may not be
reproduced or communicated without its permission.
[CONFIDENTIAL]
Once one of the three conditions is met, user can trig manual calibration within
the mobile App.
8.6.3. Restore Factory Calibration
User can restore factory calibration settings by touching this button.
Page 20 of 30
User manual – LoRaWAN CO2 sensor
This document is the property of eLichens SA and may not be
reproduced or communicated without its permission.
[CONFIDENTIAL]
9. Station settings
The main screen is organized as follow:
Navigation between screen can be performed as follow:
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