EN
LoRaWAN COMFORT CO2 - Guide utilisateur / User guide version V1.1.1
60
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FR
2.7.2 Sending on exceeding threshold
The device allows detection of exceeding threshold (high and low) for each sensor according to the following schema:
The device sends a data frame when a threshold is exceeded but also when returning to normal.
E.g.:
Register
Value encoding
Value
Result
S301
Decimal
0
Event mode (no periodicity)
S321
Decimal
300
One reading every 10 minutes (300/60 sec x 2)
S330
Decimal
2
Alarm type for high threshold temperature
S331
Decimal
240
Temperature at + 24°C (240/10)
S332
Decimal
20
Hysteresis at 2°C (20/10) below the high threshold of 22°C
S340
Decimal
0
Humidity alarm off
In this example:
• The device takes temperature and humidity every 10 minutes
• The device will trigger an alarm if the temperature is above 24°C, no alarm indicated for humidity
• The alarm will be disabled if the temperature drops below 22°C
NOTE: As described previously it is possible to combine the periodic mode and the alarm mode.
Period of
acquisition
reached?
Send frame 0x6B
Product in standby
YES
High alarm
already ON?
Value
< (high
threshold -)
Low alarm
already ON?
Value >+
(low thresh-
old +)
Value >
High thresh-
old
Value <
Low thresh-
old
High alarm off
High alarm on
Low alarm on
Low alarm off
YES
YES
NO
NO
YES
YES
YES
No
YES
Measure of tempera-
ture & humidity