Section 7. Installation
To enter the SDI-12 transparent mode, enter the datalogger support software
terminal emulator as shown in the figure Entering SDI-12 Transparent Mode
(p.
241).
Press Enter until the CR800 responds with the prompt CR800>. Type
SDI12 at the prompt and press Enter. In response, the query Enter Cx 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. For example, port 1 is entered
for terminal C1. An Entering SDI12 Terminal response indicates that SDI-12
transparent mode is active and ready to transmit SDI-12 commands and display
responses.
FIGURE 64: Entering SDI-12 Transparent Mode
7.7.14.1.1 SDI-12 Transparent Mode Commands
Commands have three components:
• Sensor address (a) — a single character, and is the first character of the
command. Sensors are usually assigned a default address of zero by the
manufacturer. Wildcard address (?) is used in the Address Query
command. Some manufacturers may allow it to be used in other
commands.
• Command body (for example, M1) — an upper case letter (the
“command”) followed by alphanumeric qualifiers.
• Command termination (!) — an exclamation mark.
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