
D5.4: Multi-sensor system integrated into wearable fabrics
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MOBISERV
FP7 248434
ANT Message
Payload Byte
Parameters
Type
Range
Description
Global Data Byte 5
Min (8-bit)
UCHAR
0..255
8 most significant bits of
the minimum recorded
analogue level
Global Data Byte 6-
7
Measured A/D Data
USHORT
0..65536
The measured A/D data
from the analogue signal
(LSB first)
The measured A/D data represents the voltage drop across the thermistor. In order to
calculate the corresponding resistance value the following conversion must be applied to the
data
value
:
= 0.305 ∙ + 22400 Ω
Once the resistance value is calculated, the Steinhart-Hart equation can be used to estimate
the corresponding value of temperature (Kelvin degrees):
1
= + ∙ + ∙ ln ln
where A = -6.151082E-3, B = 1.2127443E-3 and C =
-2.8552001E-6