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7.4.3 Fixed telegram formats
A number of predefined telegrams are available for autonomous output (
) and data
request (
). The detailed structure is described in Appendix 1 (Predefined data
telegrams). A reference list of telegram formats can be found in
Telegram name
Telegram number
Telegram structure
VDT
00001
(STX)VVV.V DDD ±TT.T *CC(CR)(ETX)
VDTHP
00002
(STX)VVV.V DDD ±TT.T hhh pppp.p *CC(CR)(ETX)
VDTBDRE
00003
(STX)VVV.V DDD ±TT.T bbbbbb ddd RRR.RRR E
*CC(CR)(ETX)
VDTHPBDRE
00004
(STX)VVV.V DDD +TT.T hh pppp bbbbbb ddd
RRR.RRR E *CC(CR)(ETX)
NMEA V 2.0
00005
$WIMWV,DDD.D,R,VVV.V,X,A*CC(CR)(LF)
EXTENDED
00006
(STX)VVV.V DDD ±TT.T hhh pppp.p nnnnnn
eeeeee ssssss wwwwww bbbbbb ddd E RRR.RRR
SUM.RR SS *CC(CR)(ETX)
EXTENDED WITH GUST
00007
(STX)VVV.V BVV.V DDD BDD ±TT.T hhh pppp.p
nnnnnn eeeeee ssssss wwwwww bbbbbb ddd E
RRR.RRR SUM.RR SS *CC(CR)(ETX)
Scientific telegram
00014
See Appendix (section 10)
Table 7: List of predefined data telegrams
Key:
V:
).
BV:
Wind speed of gust.
D:
Wind direction.
BD:
Wind direction of gust.
T:
Temperature.
h:
Relative humidity.
p:
Air pressure.
b:
d:
Direction of brightness.
R:
Precipitation intensity.
E:
Precipitation event.
C:
Check sum (EXOR linking).
X:
Identifier for scaling wind speed (K, N, M, S = km/h, knots, m/s, mph).
n:
Brightness north.
e:
Brightness east.
s:
Brightness south.
w:
Brightness west.
SUM.RR:
Total precipitation.
S:
Synop (see table 1, section
3.5.2).
7.4.4 Generation of check sum
The check sum is the result of the bytewise EXOR-link of the bytes output in the telegram, between
the telegram start sign “STX” or resp. “$” with the NMEA-telegram, and the byte “*” as identification
for the beginning of the check sum.
The bytes „STX“ or resp. „$“ and „* “ are not considered with the check sum calculation!
