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.

ClimaVue 50 extended commands
SDI-12 command1	Function
aXc!	Displays the pyranometer calibration.
aXcnnnn!	Changes the pyranometer calibration number to nnnn. Where: nnnn = calibration number
1a is the sensor address.