The variable-length comma separated MWV as defined by NMEA 0183 can be used to receive wind data.
$<transmitter ID>MWV,<dir>,<ref>,<spd>,<uni>,<sta>*<chk><CR><LF>
Name | Description |
---|---|
$ |
Fixed character |
<transmitter ID> |
Two characters or Pxxx .
1 |
MWV |
Fixed characters |
<dir> | Wind angle, 0 to 359
degrees |
<ref> |
Reference:
|
<spd> | Wind speed |
<uni> |
Wind speed units:
|
<sta> |
Status:
|
* |
Fixed character |
<chk> | Checksum: 8‑bit XOR, between and excluding $ and
* |
<CR> |
Carriage return code, ASCII 0Dh |
<LF> |
Line feed code, ASCII 0Ah |
Example or MWV message
$WIMWV,320,R,15.0,M,A*0B<CR><LF>
Polling MWV message
When you select MWV message and poll mode in the message settings, the display sends a poll command according to the WMT700 NMEA MWV profile.
$WI<id>Q,MWV*<chk><CR><LF>
Value <ID> is the 2‑character Sensor ID set in the message settings. The first character is P
and the second
character is the WMT700 ID (for example, A
).
Example of polling command
$WIPAQ,MWV*72
1 NMEA
standard defines the usable transmitter IDs.
WI
means wind sensor
and it is typically used when there is no need to especially identify the sensor. In
the display you can use wildcards (**
) as the ID. When sensor ID is
needed (for example, in polling) , Vaisala sensors use “P
” +
1 character between A
and Z
.