MWV message format - WID513

WID513 User Guide

Document code
M211676EN
Revision
G
Language
English
Product
WID513
Document type
User guide

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:

  • R = Relative
  • T= Theoretical (not used)
<spd> Wind speed
<uni>

Wind speed units:

  • K = km/h
  • M = m/s
  • N = kts
<sta>

Status:

  • A = Valid data
  • V = Invalid data
* 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.