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Table 8-2: SDI-12 extended commands
SDI-12
command
1
Values returned or function
Comments
a
XTEST!
Returns two lines of header
information, then returns updated
data at every tip and every 2 seconds
or until a break is detected with each
line terminated with a <CR><LF>.
Command is only intended
for testing and debugging
the sensor.
a
XHELP!
Lists the standard measurement and
extended commands supported by the
RainVUE-series.
Command is only intended
for testing and debugging
the sensor.
1
a is the sensor address.
8.3 SDI-12 version 1.4 identify measurement
commands and responses
Version 1.4 compliant sensors must respond to identify commands for each type of measurement
command and each parameter with a command. The broad identify commands return how many
variables will be returned with a given measurement command and the time it will take the
sensor to respond. The specific identify parameter commands will return a SHEF code, the
measurement units, and the type of measurement (sample, count, or average). For more
information see the SDI-12 version 1.4 specification.
(
http://sdi-12.org/current_specification/SDI-12_version-1_4-Jan-10-2019.pdf
)
Table 8-3: Identify commands for the RainVUE-series
Type of command
Command
Sensor response
Comment
Identify
measurement for
M
commands
a
IM!
,
a
IMC!
,
a
M1!
,
a
IMC1!
atttn
ttt: response time
(seconds)
n: # of values returned
Identify
measurement for
C
commands
a
IC!
,
a
ICC!
,
a
IC1!
,
a
ICC1!
atttnn
ttt: response time
(seconds)
nn: # of values returned
RainVUE-Series SDI-12 Precipitation Sensors
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