Table 9-2: RS-232 command list
Command
usage
Default
value
Function
@v (x)
⏎
1
Set the verbose level: 0 – none/1 – show information. Keep the verb-
ose level at 1 if using the RS-232 example program.
@i (x)
⏎
0 (polling
mode)
Set measurement interval in minutes. The sensor should be kept in
polling mode for use with the sample RS-232 data logger program.
Allowed values: 1, 2, 3, 4, 5, 6, 10, 20, 30, and 60.
@h (x)
⏎
2000 mm
Manually set the current gage height in millimeters. Use this com-
mand only if automatic calibration fails.
@g (x)
⏎
Where (x) is
the existing
snow depth
n/a
Reset the sensor ground level. This command would be used with
the offset if there is existing snow on the ground when the sensor is
installed.
@m
⏎
n/a
Run a round of measurements immediately.
@s
⏎
n/a
SDMS40 status. This shows various system information such as cur-
rent firmware version and installation angle and height.
@ac
⏎
n/a
Perform automatic calibration to determine installation height and
angle.
@history
⏎
n/a
Show measurement data from the last 24 hours.
@lowtempx
⏎
Where x is the
desired
threshold
0°C
To check the current threshold value, type “@lowtemp”
⏎
.To
modify the heater threshold value, include the value x. The heater
will turn on when the internal temperature drops below this value
and will remain on until the temperature climbs above the
threshold. Allowed values range from -40°C to 10°C.
@b (x)
⏎
Where x is an
index for the
desired baud
rate
0
(57,600 bps)
Check or modify the baud rate of the serial port. To check current
baud rate, type “@b”
⏎
. To modify the baud rate, include the
desired index that follows.
0: 57600, 1: 38400, 2: 19200, 3: 9600, 4: 4800, 5: 2400, 6: 1200.
@d
⏎
n/a
Check and modify the current SDMS-40 date
* to modify the SDMS-40 date, type “@d”
⏎
and follow instruc-
tions.
SDMS40 Multipoint Scanning Snowfall Sensor
14
