Table 8-1: SDI-12 measurement commands
SDI-12
command
1
Values returned
Units
Comments
a
V!
1. Operating system (OS) version
2. Hardware revision starting at 1
3. Reset code
2 = Power on
11 = OS update
12 = Watchdog timeout
NA
1
a
is the sensor address. In the
SDI12Recorder()
CRBasic instruction, the command parameter does not include
the SDI-12 address because the address is a separate parameter.
2
The
a
M!
,
a
MC!
,
a
MC1!
,
a
C!
,
a
C1!
,
a
CC!
,
a
CC1!
,
a
RC0!
, and
a
RC1!
commands reset the measurement
accumulator.
3
The total intensity accumulator is reset using the
a
XWARA!
,
a
XWA
+
xx.xx
!
, or
a
XWRESET!
commands. Refer to
for more information.
8.2 SDI-12 extended commands
Enter the SDI-12 extended commands in
(p. 18) using the transparent mode while the
computer is communicating with the data logger through a terminal emulator program. It is
accessed through Campbell Scientific
Device Configuration Utility
software or other terminal
emulator programs. Data logger keyboards and displays cannot be used. Refer to
(p. 44) for more information.
Table 8-2: SDI-12 extended commands
SDI-12
command
1
Values returned or function
Comments
XRDT!
Reads sensor date and time.
a
XWDT+
MM/DD/YYYY
hh:mm:ss
!
Writes date and time.
a
XWARA!
Extended write adjusted rainfall
accumulator command; resets the
total adjusted rain accumulator to
0.00.
Typically this command is
issued on the start of the
water year, often October 1
or January 1.
RainVUE-Series SDI-12 Precipitation Sensors
18