Transparent Mode Commands; Terminal Master - Campbell CR300 Series Product Manual

4. In response, the query Select SDI12 Port: is presented with a list of available ports.
Enter the port number assigned to the terminal to which the SDI-12 sensor is connected,
and press Enter.
5. In answer to Enter timeout (secs): type 100 and press Enter.
6. In response to the query ASCII (Y)?, type Y and press Enter.
7. SDI-12 communications are then opened for viewing.
17.9.2.1 SDI-12 transparent mode commands
SDI-12 commands and responses are defined by the SDI-12 Support Group (www.sdi-12.org) and
are available in the SDI-12
support. Commands have three components:
Sensor address ( a): A single character and the first character of the command. Sensors are
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usually assigned a default address of zero by the manufacturer. The wildcard address ( ?) is
used in the Address Query command. Some manufacturers may allow it to be used in
other commands. SDI-12 sensors accept addresses 0 through 9, a through z, and A through
Z.
Command body (for example, M1): An upper case letter (the "command") followed by
l
alphanumeric qualifiers.
Command termination ( !): An exclamation mark.
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An active sensor responds to each command. Responses have several standard forms and
terminate with <CR><LF> (carriage return–line feed).

17.9.3 Terminal master

Use the Terminal master command from a terminal mode to manually interrogate and enter
settings in smart-sensors connected to a remote CR300 series. The Terminal master is useful for
remotely accessing data logger terminal features such as SDI-12 and serial talk through modes for
configuration and trouble shooting.
Using a terminal emulator enter the CR300 series terminal mode. For more information, see
Using terminal mode
1. Press Enter until the data logger responds with the prompt CR300 series>.
2. Type T at the prompt and press Enter.
Specification. Sensor manufacturers determine which commands to
(p. 128)
17. Tips and troubleshooting 132