C.1.11 Extended commands
Many sensors support extended SDI-12 commands. An extended command is specific to a make
of sensor and tells the sensor to perform a specific task. They have the following structure.
Responses vary from unit to unit. See the sensor manual for specifics.
Command: aXNNNN!
The command will start with the sensor address (a), followed by an X, then a set of optional
letters, and terminate with an exclamation point.
Response: a<optional values><CR><LF>
The response will start with the sensor address and end with a carriage return/line feed.
The only extended command a customer might need is the following command which is used to
enter a new pyranometer calibration factor when the rain gage funnel and pyranometer are
replaced.
Operating system (OS) upgrades require additional equipment and extended commands and
therefore are not practical for most customers. Contact a Campbell Scientific repair department
for assistance if a OS upgrade is needed.
Table C-4: ClimaVUE 50 extended commands
SDI-12 command
1
Function
aXc! Displays the pyranometer calibration.
aXcnnnn!
Changes the pyranometer calibration number to nnnn.
Where: nnnn = calibration number
1
a is the sensor address.
C.2 SDI-12 transparent mode
System operators can manually interrogate and enter settings in probes using transparent mode.
Transparent mode is useful in troubleshooting SDI-12 systems because it allows direct
communication with probes. Data logger security may need to be unlocked before activating the
transparent mode.
Transparent mode is entered while the computer is communicating with the data logger through
a terminal emulator program. It is accessed through Campbell Scientific data logger support
software or other terminal emulator programs. Data logger keyboards and displays cannot be
used.
ClimaVUE 50 Compact Digital Weather Sensor 47
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