Chapter 7 ___________________________________________________ Retrieving Data Messages
VAISALA______________________________________________________________________ 125
TXT Text Transmission
The text transmission response format:
$WITXT,xx,xx,xx,c--c*hh<cr><lf>
Examples:
$WItXT,01,01,01,Unable to measure error*6D<cr><lf> (wind data
request when all the wind parameters were disabled from the wind
message).
$WITXT,01,01,03,Unknown cmd error*1F (unknown command
0XO!<cr><lf>).
$WITXT,01,01,08,Use chksum 2F*72 (wrong checksum used in MWV
query command)
Table 27 on page 168 shows the short text messages and their
interpretation.
where
$ = Start of the message
WI = Talker identifier (WI = weather instrument)
TXT = Text transmission identifier.
xx = Total number of messages, 01 to 99
xx = Message number.
xx = Text identifier (see text message table)
c---c = Text message (see text message table)
* Checksum delimiter
hh = Two-character checksum for the query command.
<cr><lf> = Response terminator
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