Vaisala WS425FG - Manual (Page 43)

Chapter 4 ________________________________________________________________ Operation
VAISALA_______________________________________________________________________ 41
The sensor will stop the current measurement activity when it receives
this command, and will respond with
PASSWORD? CR LF
At this time, the sensor will expect the password in capital letters and
CR LF in caps to be typed. If the password is not correct, the command
will be terminated unsuccessfully with the response string:
INVALID PASSWORD CR LF
and normal operation will resume.
If the password is entered correctly, the sensor will respond with:
READY FOR FIRMWARE CR LF
At this time, the host computer must send the firmware to the sensor in
a standard Intel hex format. Flow control must be accomplished by the
host holding off the next record until the echo of the current record is
completely and successfully received. The host may send complete
records without waiting character by character for the echo check. The
host will perform error recovery by checking each character in the
record echo against what was sent. The host must repeat records with
errors. The sensor will perform the power on a initialization sequence
once the firmware download completes.
For firmware v2.04 and above, downloading new firmware will not
modify any calibration information already saved in the sensor if this
calibration information is still meaningful to the new firmware. Observe
the power on initialization message following the firmware download.
If the new firmware requires the calibration operations to be repeated,
the following message will be displayed:
WARNING, SENSOR IS UNCALIBRATED. PERFORM CALIBRATION
BEFORE USE.
If this message does not appear prior to the ready indication, you may
assume the sensor calibration remains intact.
WA Command
This command requests the averaged wind speed and direction message
with peak winds. The command format is:
WA CR LF