SenAir CO2

This is an overview of the SenAir CO2, a portable device to obtain critical Air Quality information and make this data readily available online. This page will explain how to configure a SenAir CO2 and connect it to the IoT platform.

Features

High resolution, accurate CO2 measurements
Accurate Temperature and Humidity measurements
Measurement Alarm Thresholds
Battery life up to 5 years

Configuration via Downlink

Before you can configure via downlink you must Add your device to the platform.

Navigate to the device and select Actions → Controls from the menu beside the device.
Select Device Config from the Downlink selection drop down menu and complete the downlink fields below.
Click Queue to add to the downlink queue.

Device Config

Device Config
Wakeup Period	Set the period you want your device to wake-up and transmit a meter reading.
Rejoin Period	The period at which your device will rejoin the network
New Hour	Overwrite your device’s time
New Minute	Overwrite your device’s time
New Second	Overwrite your device’s time
Update Time	0 if you are not updating the time, 1 if you are.

Target Calibration

Target Calibration
Calibration Target	The value of the calibration target in ppm for CO2

Calibration

The SenAir CO₂ comes factory calibrated. However, it is possible to calibrate your SenAir CO2 device and this can be done via downlinks or over serial interface. Simply set a calibration target by downlink or serial.

Downlink

Navigate to the device and select Actions → Controls from the menu beside the device.
Select Target Calibration from the Downlink selection drop down menu and enter a Calibration Target.
Click Queue to add to the downlink queue.

Serial

Connect the device to your PC via serial.
Enter device calib target [value] into the command line interface and hit enter.

The calibration target should be the actual value of the CO2 ppm currently in contact with the device. Running this command will fit the next reading to what you set as the target and reset the baseline for that sensor.

Configuration via serial

Connect the device to your PC via serial.
Now you can use the commands below to configure report rate, leak period, burst threshold and current time, similar to the example below.

Device Commands

Commands	Description
Wakeup base [interval]	Sets the wakeup period (minutes) at which interval the SenAir transmits data.
rejoin [interval]	Sets the re-join period (hours)
time hour x	Set the device clock (hours)
time minute x	Set the device clock (minutes)
time second x	Set the device clock (seconds)
help	Shows a list of available commands
run	Closes command line and runs
show	Shows current configuration
device calib target [value]	Sets the calibration value and runs the calibration routine
flash save config	Make configuration changes permanent
flash save data	Make data changes permanent

Example

The following snippet shows the configuration of a SenAir CO2 device.

wakeup base 60 - sets the device to wake and transmit every 1hr
rejoin 3 - sets the device to rejoin the network every 3 hrs
device calib target 500 - sets the calibration target to 500
flash save config - Saves the current settings
run - runs the device

Glossary of Terms

Uplink	An uplink is a message sent from your device to the platform over the network
Downlink	A downlink is a message sent from the platform to your device over the network
Transmit	The sending of data from the device to the IoT Platform
Calibration	Comparison and improvement of a sensors measurement relative to a value of known accuracy.
Calibration Target	The value to Calibrate the sensor against in the current environment.

Knowledge Base