User’s Guide ______________________________________________________________________
104 _________________________________________________________________ M210906EN-C
TXT Text Transmission
These short text messages and their interpretation are shown in
Table 11
on page 136
.
The text transmission response format:
$WITXT,xx,xx,xx,c--c*hh<cr><lf>
4
=
Transducer id for generic field
*
Checksum delimiter
2D
=
Two-character CRC for the response.
<cr><lf>
=
Response terminator
1. See Chapter 8, section Supervisor Message, Setting Fields for definitions
of the Heating voltage field.
Table 8
Transducer Table
Transducer
Type
Units Field
Comments
Temperature
C
C = Celsius
F = Fahrenheit
Angular displacement
(wind direction)
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
Accumulated
precipitation
V
M = mm, I = in, H = hits
non-standardized1
Time (duration)
Z
S = seconds
non-standardized1
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-standardized1
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
Generic
G
None (null)
P=Percent
1. Not specified in the NMEA 0183 Standard.
where
$
=
Start of the message
