Chapter 7 ___________________________________________________ Getting the data messages
VAISALA________________________________________________________________________ 61
where
$
=
Start of the message
WI
=
Talker identifier (WI=weather instrument)
XDR
=
Transducer measurement response identifier
C
=
Transducer id 2 type (Heating temperature), see the
following Transducer table
25.5
=
Transducer id 2 data (Heating temperature)
C
=
Transducer id 2 units (C, Heating temperature)
2
=
Transducer id for Heating temperature
U
=
Transducer id 0 type (Heating voltage)
10.6
=
Transducer id 0 data (Heating voltage)
N
=
Transducer id 0 units (N=heating disabled or heating
temperature too high
1
, Heating voltage)
0
=
Transducer id for Heating voltage
U
=
Transducer id 1 type (Supply voltage)
10.9
=
Transducer id 1 data (Supply voltage)
V
=
Transducer id 1 units (V, Supply voltage)
1
=
Transducer id for Supply voltage
U
=
Transducer id 2 type (3.5V reference voltage)
3.360
=
Transducer id 2 data (3.5V reference voltage)
V
=
Transducer id 2 units (V, 3.5V reference voltage)
2
=
Transducer id for 3.5V reference voltage
*
CRC delimiter
71
=
A two character CRC for the response.
<cr><lf>
=
Response terminator
1
See section Supervisor message for definitions of the Heating
voltage field.
Transducer table
Transducer
Type
Units field
Comments
Temperature
C
C= Celsius
F= Fahrenheit
Angular displacement
A
D=degrees
Wind speed
S
K=km/h, M= m/s N=knots
S=mph, non-standardized
1
Pressure
P
B=bars, P=Pascal
H=hPa, I=inHg, M=mmHg
Humidity
H
P=Percent
Precipitation
V
M=mm, I=in, H=hits
non-standardized
1
Time (duration)
Z
s=seconds
non-standardized
1
Intensity (flow rate)
R
M=mm/h, I=in/h, H=hits/h for rainfall
M=hits/cm
2
h, I=hits/in
2
h, H=hits/h for hails
non-standardized
1
Voltage
U
V=volts (also 50% duty cycle for heating) N=not in use, F=50% duty
cycle for heating, W= full
power for heating
1
Not specified in the NMEA 0183 Standard.