Vaisala WS425 - Manual (Page 62)

USER'S GUIDE____________________________________________________________________
62 __________________________________________________________________ M210361EN-E
The response is the following:
attn<CR><LF>
where
a = The sensor address.
tt = The time in seconds the sensor needs until it
has the verification data ready (01)
n = The number of verification data fields that
will be returned (4).
<CR><LF> = Terminates the response.
Vaisala-specific SDI-12 Commands
Supported by WS425
Measurement Unit Change (aXUx!)
This command sets the desired measurement unit for wind speed. The
command is available in submode A only.
The command is the following:
aXUx!
where
a = The sensor address.
XU = The change measurement unit command.
x = Desired wind speed unit. The options are:
0 = mph (default value)
1 = kt
2 = km/h
3 = m/s
! = Terminates the command.
The response is the following:
a+x<CR><LF>
where
a = The sensor address.
x = The new wind speed setting.
<CR><LF> = Terminates the response.