Transmission On Exceeding Co2 Concentration Threshold - ADEUNIS LoRaWAN COMFORT CO2 Guide Utilisateur

LoRaWAN COMFORT CO2 - Guide utilisateur / User guide version V1.1.1

2.7.3 Transmission on exceeding CO2 concentration threshold

The device enables to detect if a high threshold is overpassed for the CO2 concentration, as mentioned in the following scheme:
The product send the frame when the threshold is overpassed or when it comes back to normal.
FR
EN
Value <
No
(threshold -
hysteresis)
Yes
Deactivation of the
alarm
Product in standby
Period of
No
reading
reached ?
Yes
Measure CO2
Alarm
Yes
already
activated?
No
Value > No
threshold
Yes
Activation of the
alarm
Send frame 0x6B
Example:
Register Encoding Value
value
S301 Decimal 0
S321 Decimal 300
S350 Decimal 1
S353 Decimal 1300
S354 Decimal 30
In this example:
• The product measures the CO2 concentration every 10 minutes.
• The product activate the alarm if a measure is higher than 1300
ppm.
• The product send the "come back to normal" and deactivate the
alarm if the CO2 concentration is turned back under 1270 ppm
(1300-30).
NOTE: as mentioned, it is possible to mix the periodical mode and
the alarm mode.
Result
Event mode (no periodic
data)
1 sample every 10 minutes
(300/60sec*2)
Alarm CO2 activated
High threshold value in ppm
Hysteresis in ppm
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