Connected Inventions AirWits CO2 User manual

www.connectedinventions.com
User Manual
Connected AirWits CO2
R5.2
AirWits CO2
Connected AirWits CO2 is a connected
carbon dioxide (CO2), temperature, and
humidity metering device
Last updated August 2020

!
Contents
3
Using this manual
3
Read me first
5
About the device
Function
Assembling and Installation
Uplink: Payload description
Downlink
Downlink: Payload description
Downlink: Measurement Interval
Troubleshooting
Technical Specification
6
7
9
10
11
11
13
14
2

!
Thank you for choosing this Connected
Inventions device. This device will provide you
high-quality IoT with Connected Inventions’
exceptional technology and high standards.
This manual has been specially designed to
guide you through the functions and features
of your device.
Using this manual
• Before using your device, read the entire
manual and all safety instructions to
ensure safe and proper use.
• The descriptions in this manual are based
on the default settings of your device.
• The images used in this manual may differ
from the actual product.
• The contents of this manual may differ
from software provided by service
providers or carriers, and are subject to
change without prior notice.
• Access the Connected Inventions website
(www.connectedinventions.com) for the
latest version of the manual.
• Available features and additional services
may vary by service provider.
Read me first
3

.
!
• Applications on this device may perform
differently from comparable applications
and may not include all functions available
(by ie. downlink messaging features)
• Connected Inventions is not liable for
performance issues caused by third-party
applications or improper installation.
• Please keep this manual for future
reference.
• In case of malfunction, deliver the device to
the supplier. Do not open the cover.
• Do not remove packing material and do not
repack the device unless necessary.
Contact the shipping agent before
transportation. Inside the device there is a
battery which contains approximately 3.0 g
of lithium.
• Return the device to a disposal station
which collects electronics waste and
batteries.
• Protect the device from moisture, water,
and dirt.
Malfunction
Transportation
Disposal
Operation
4

!
Connected Inventions AirWits CO2 is a
wireless air quality metering device with
ultra long battery life. This intelligent and
small device measures and sends the
CO2, temperature and humidity data
sequentially from 10 min to 24 hours
using the world-wide Sigfox IoT-network
connectivity for data transmission,
enabling very low lifetime cost. The
installation of the device is extremely
simple procedure and requires neither
special tools nor configuration operation.
The device is maintenance free, and thus a
great solution especially for long term
indoor air quality metering providing
accurate data for energy savings and
comfortable living conditions which can
be monitored remotely. By default, the
device calibrates itself every 48 hours yet
it offers different calibration features for
advanced use, when needed.
About
5

The basic functionality procedure example:!
Function
When the device is powered on, it will do initial CO2 measurement calibration within 30
minutes. For this time, place the sensor in fresh air environment clear from any human,
gas or petrol operated devices, stoves, burning objects or animals as the initial
calibration target is 400ppm CO2. After calibration is ready, the device will send the
initial measurements and ask downlink message from the network. The CO2 Baseline,
transmission interval time and adaptive power control function can be set through
downlink message. In case the downlink message is not in use, the device continues to
send a measurement message every 30 minutes and request downlink message every
24 hours.
6

!
Assembly & Installation
!
Save the identifier and the key
of the device. The identifier
and the PAC key is on the label
on the bottom of the device.
Yo u c a n a l s o r e a d t h e
identifier and the PAC key
using the QR code.
!
Move the device to fresh air
location and switch the device
on by sliding the power switch
to position “1”
!
Install the wall plate to the
wall using screws suitable for
the wall material. Please
note the orientation!
!
Attach the device to the wall
having the pins meeting
installation holes in the
device. Please note the
orientation!
1
2
3
4
7

!
The device needs to be calibrated.
During the first 24 hours of initialisation
the device needs minimum of 1 hour of
fresh air in order to work properly. This
means that the device needs a
minimum of 1 hour after initialisation in
an environment without any CO2
Please note! Avoid placing device
closer than 15cm on any metal or
magnetic object, electric cables,
electric devices or selective glass
as this will dramatically reduce
radio performance as well as
battery life of the device.!
!
Replacing batteries
The device battery pack is proprietary made. Once device runs out of battery, please
contact your local partner or Connected Inventions for support the battery pack
replacement. Do not try to replace the battery pack with other brands available as there
is a risk of breaking the device. The battery pack lasts years in normal use so in case of
no messages received from the device, please check first the power is switched on and
the Sigfox radio coverage is available at the location.
8

Indexing: bytes are in big-endian order and bits in standard 76543210 "little endian" order.
BYTE
BIT
TYPE
NAME
DESCRIPTION
0
0
Boolean
Auto Calibration
FALSE = off, TRUE = on
0
1
Boolean
Zero Point Adjusted
1= TRUE, 0 = FALSE
0
2
Boolean
Transmit power
FALSE = Low, TRUE = Full
0
3
Boolean
Power Control
Active power control. TRUE= On, FALSE = OFF
0
4-7
UInt4
FW version
FW version
1-2
0-15
UInt16
Temperature
(Value /10) - 40 = Temperature [°C]
(Value /18) - 8 = Temperature [°F]
3
0-7
UInt8
Humidity
Humidity [%]
4-5
0-15
UInt16
CO2
CO2 concentration [ppm]
6
0-7
UInt8
CO2 Baseline
Baseline = (N*10)ppm, if N=0 then Baseline =
400ppm
0
0
Boolean
Auto Calibration
FALSE = off, TRUE = on
Uplink: Payload Description
Example: UL Messages
1C000000010028
• Firmware: 1
• Power control: On
• TX power: Full
• Zero Point Adjusted: FALSE
• Auto Calibration: Off
• Temperature: -40.0’C
• Humidity: 0%
•CO2: 256ppm
• CO2 Baseline: 400ppm
18000000010028
• Firmware: 1
• Power control: on
• TX power: Low
• Zero Point Adjusted: FALSE
• Auto Calibration: Off
• Temperature: -40.0’C
• Humidity: 0%
•CO2: 256ppm
• CO2 Baseline: 400ppm
9

!
0x026F = 623Dec
(623/10)-40 = 22,3
24024D09019840
• Firmware: 2
• Power control: Off
• TX power: Full
• Zero Point Adjusted: FALSE
• Auto Calibration: Off
• Temperature: 18.9’C
• Humidity: 9%
•CO2: 408ppm
• CO Baseline: 640ppm
27024D09019840
• Firmware: 2
• Power control: Off
• TX power: Full
• Zero Point Adjusted: TRUE
• Auto Calibration: On
• Temperature: 18.9’C
• Humidity: 9%
•CO2: 408ppm
• CO Baseline: 640ppm
25024D09019840
• Firmware: 2
• Power control: Off
• TX power: Full
• Zero Point Adjusted: FALSE
• Auto Calibration: On
• Temperature: 18.9’C
• Humidity: 9%
•CO2: 408ppm
• CO Baseline: 640ppm
10

!
Advanced Features
• CO2 Baseline is an offset point for CO2 measurement observation value.
By default, when the device calibrates itself, it assumes the lowest value
measured during calibration period to be 400ppm. If you know the CO2
level on the particular place the device is located to be higher or lower,
you can set the lowest CO2 value accordingly. By example in crowded
cities the CO2 level can be considerably higher than 400ppm even in fresh
air environment. On the other hand, in rural areas the CO2 level could
sometimes be lower than 400ppm. You can set the CO2 Baseline using
downlink message (see Downlink: Payload description below). By default
CO2 Baseline is set to 400.
• Note: When setting new CO2 Baseline value with Downlink message, the
Auto Calibration Period will start from beginning and at the end of the
period set the lowest value measured to match the new CO2 Baseline.
• Note: If you are not sure about the CO2 levels in the location the device is
in, it is not recommended to alter the CO2 Baseline from default settings.
• By default, the device calibrates itself every 48 hours for the lowest value
to be the CO2 Baseline value (default setting : 400ppm). You can set the
Auto Calibration Period from 2 to 30 days. When the calibration period is
over, the device will apply the lowest value measured to be the CO2
Baseline value and set the Zero Point Adjusted bit to “1” for the next Uplink
payload. You can also disable the Auto Calibration feature offby adjusting
Auto Calibration Period value to 0 in Downlink message. In this case the
existing calibration will remain and it will not be adjusted any more. This
might be reliable solution in places where the CO2 values may vary a lot
based on weekdays, amount of people, time of the year etc. - The
calibration drifting caused by the hardware is only +/- 35ppm for 5 years
life span.
• Note: If you are not sure about the CO2 level variation in the place the
device is in, it is not recommended to alter the Auto Calibration settings
from default settings.
CO2 Baseline
Auto Calibration
11

The settings of the device can be updated with the downlink message
• The device requests new settings every 50 messages
You must be very careful when you update the settings
• The settings affect both the subscription and the battery life of the device
The downlink message is optional
If the downlink message is not sent, the device continues with the current
settings
Default settings when device has not been configured with downlink:
• Uplink reporting period is 30minutes
• Adaptive Power Control is OFF
• Full transmit power is used
• Auto Calibration is on and set to 2 days calibration period
• CO2 Baseline is 400 ppm
If the Adaptive power control feature is set on, the device will automatically adjust
the transmit power to optimum level to save battery and create less unnecessary
interference to radio network
• By default power control is OFF
• When power control is OFF, full TX power is used
Downlink
The Adaptive power control feature is only available in RCZ1 device
!
!

BYTE
BIT
TYPE
NAME
DESCRIPTION
0
0-3
UInt4
Auto Calibration Period
n*2 days, 0 = off
0
4-5
UInt2
Reserved
Set to 0
0
6
Boolean
Automatic Power Control
FALSE = Off, TRUE = On
0
7
UInt1
Reserved
Set to 0
1
0-7
UInt8
Update interval
5,5 min * (n+2) →11min … ~24h. If
n=0 then 11min
2
0-7
UInt8
CO2 Baseline /10
BL=(n*10)ppm, if n=0 then
BL=400ppm
3-7
0-39
UInt40
Reserved
Set to 0
Example: DL Messages
•00000000000000
• Power control: Off
• Auto Calibration: Off
• Update interval: 11 min
• CO2 Baseline: 400 ppm
•4001310000000000
• Power control: On
• Auto Calibration: Off
• Update interval: 15 min
• CO2 Baseline: 490ppm
•4F08500000000000
• Power control: On
• Auto Calibration: 30 days
• Update interval: 50 min
• CO2 Baseline: 800 ppm
Indexing: bytes are in big-endian order and bits in standard 76543210 "little endian" order.
13
Downlink: Payload Description

!
Troubleshooting
• Ensure the power is switched on
• Check there is Sigfox network coverage available
• Ensure the device is not installed near metallic objects, electric
cables, electric devices or selective windows.
• Metallic roofs, steel reinforced concrete, underground location and
other obstacles can dramatically reduce radio signal.
• Check the operation mode of the device.
• Incorrect downlink configuration will affect the behaviour of the
product.
• Ensure the configuration is properly done.
connectedfinland
connected_fin
connectedinventions
www.connectedinventions.com
[phone]
Connected Inventions, Spektri Business Park, Kvintti Building,
Metsänneidonkuja 12, 02130 Espoo, Finland.
[email protected]
14

Description
AirWits CO2 is a wireless IoT CO2, -temperature and
humidity metering device.
Size
100 x 100 x 27 mm
Weight
178 g
IP rating
IP20
Batteries
3xA 3.6 V LiSoCl2
Battery capacity
12000 mAh
Battery life
5 years with 30 min measuring interval
Sensors
GSS CozIR LP, Sensirion SHT30
Environment
Temperature 0 … 50 °C [accuracy 0.2°C]
Humidity 0 … 95 % [accuracy 2%]
0…5000 ppm [typical accuracy +3%, +/-30ppm in +25°C]
Radio configurations
Sigfox 868 MHz (RCZ1), 902 MHz (RCZ2), 920 MHz (RCZ4)
Antenna
Internal helical antenna
Uplink & Downlink
Communication
Certification
CE, Sigfox
Product Code
CICO2-3005-R0502 (RCZ1)
CICO2-3205-R0502 (RCZ2)
CICO2-3405-R0502 (RCZ4)
Technical Specification