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 (
) and
are available in the
. Sensor manufacturers determine which commands to
support. Commands have three components:
l
Sensor address ( a): A single character and the first character of the command. Sensors are
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.
l
Command body (for example, M1): An upper case letter (the “command”) followed by
alphanumeric qualifiers.
l
Command termination ( !): An exclamation mark.
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
1. Press Enter until the data logger responds with the prompt
CR300 series>
.
2. Type
T
at the prompt and press Enter.
17. Tips and troubleshooting
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