If you do not get a reply, check the address setting for the ACCUBUBBLE and make sure you use
the proper address for the sensor.
Commands (Overview)
The commands to set up and operate the ACCUBUBBLE are those defined by the SDI-12
specifications version 1.0, version 1.1, version 1.2, and version 1.3 plus some extended commands
defined by Sutron. All commands start with a single-character address and end in an exclamation
point. The address is a single character with values 0 to 9, A to Z, and a to z. Values are entered
in the form of a polarity sign (
+
or
−
) followed by up to seven digits, including a decimal point. The
commands are in ASCII and all the replies use printable ASCII characters followed by <CR> <LF>.
The case of the letters is important. An “A” is not the same as an “a”.
Note: Some dataloggers, such as the Sutron 8400, enter the exclamation point automatically.
Note: ALL ACCUBUBBLE COMMANDS ARE UPPER CASE
The ACCUBUBBLE replies to all SDI-12 commands it supports. If the ACCUBUBBLE receives a
command it does not support, no reply is made. The reply will have one of two forms:
a0000
where a is the address and the 0000 indicates that there is no
further message to send
or
atttn
and
a
where a is the address, ttt is the amount of time, in seconds,
the ACCUBUBBLE needs to make the measurement or
process the command and n is the number of values that can
be collected. In this form the sensor will also respond with its
address when the data is ready to collect if ttt is not 000. This
response is called a service request.
If you issued the
change address
command or the
identify
command described in the previous
sections, you already have some experience with using ACCUBUBBLE commands. There are
other commands available to make measurements, set the type of output units for the measurements,
perform special scaling of the measurements, do field calibration, etc. The following sections
describe the commands by function.
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