SDI-12 Command Summary:
Acclima SDI-12 sensors implement commands that comply with versions 1.0, 1.1, 1.2, 1.3 and 1.4
of the SDI-12 specifications. All commands required for full compliance of the version 1.4
specifications are implemented in the TDR sensors. However, the ‘additional measurements’
commands in the SDI-12 specification are meaningless to the Acclima SDI-12 sensors, since the
permittivity, moisture, conductivity, and temperature measurements are all required and all made
with every single measurement. Hence the response for all of these additional measurements
commands is “a<CR><LF>” as required by the SDI-12 specification. The sensor ignores
unimplemented commands outside those required by the SDI-12 specification. There is no response
to them.
Additional ‘Extended Commands’ that are not enumerated here, are incorporated by Acclima for
digitized waveform dumps and factory calibration settings and readings.
Command Reference:
The table below documents all commands supported by the SDI-12 sensor in alphabetical order:
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