38
ATIM_ACW-THAQ_UG_FR_V1.7
c.
Threshold configuration
High threshold value
field: value (in hundredths ° C or% RH) triggering the high threshold (
Little Endian
encoding)
Low threshold value
field: value (in hundredths ° C or% RH) triggering the low threshold (
Little Endian
encoding)
Hysteresis
field: threshold uncertainty margin (in hundredths ° C or% RH -
Little Endian
encoding)
Duration
field: minimum waiting time before triggering the alert following the threshold crossing. Possible values
range from
1 to 10 seconds
(whole numbers only). To deactivate the threshold, this field must be at
0
.
Threshold tx
field: period of transmission of periodic frames during a threshold crossing. This value allows periodic
frames to be sent more regularly when a threshold is exceeded. However, the frame sent will only contain one sample
per active channel. This value must be
between 4 minutes and the basic emission period
of the product (set during
product configuration). To deactivate this feature, this field must be at
0
.
d.
Configuration of the temperature compensation
The temperature compensation can be done on two points:
-
Offset
: addition or subtraction of a given value from the temperature measured by the sensor.
-
Coefficient
: multiplication of a given value by the temperature measured by the sensor.
These two points of compensation can obviously be combined.
Offset
The temperature offset is represented by the "Value" field
in the table above. The offset value must be sent in
Little
Endian
encoding and can be between 10,000 and -10000
(hundredths of a ° C).
EXAMPLE
For a 2°C temperature offset, the value will be 200 = 0xC800.
Byte
1
2 3 4 5 6 7 8 9
1
0
11
Parameter code
0xD6
(temperature
threshold)
0xD7
(humidity
threshold)
0xDA
(VOC threshold)
0XDE
(CO
2
threshold)
0
x
0
9
0
x
0
0
Hi
gh
th
re
sh
ol
d
val
ue
Lo
w
th
re
sh
ol
d
val
ue
Hy
st
er
esi
s
L
e
n
g
t
h
Threshold Tx
Parameter code
(Byte 1)
Byte 2
Byte 3
0x58
(temperature
offset)
Value
