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<constant>
Single ASCII character specifying the water constant accessed by the command. Water constants
are used in conjunction with the
Custom
soil types. When a
Custom
soil type is selected, the
probe will use the water constants to compute the soil moisture content. Custom 1 uses all 4
constants, Custom 2 uses the first 2 constants only. The default constant values are the same as the
Silt
soil type.
Values:
A
Constant
A
B
Constant
B
C
Constant
C
D
Constant
D
<float>
Decimal number, optionally using a form of scientific notation.
Ex: “+23.54, 0.001, -123.0E5, 45.E-3”
<warmup>
16-bit integer value between 0-65535. This is the number of milliseconds that the probe is
enabled before measurements are taken and ready. The default value is
1000
.
<id-string>
Identification string containing the manufacturer, model number, version and
manufacturer specific data. In this case the specific data is the soil type and
serial
number.
Example:
012STEVENSW0000012.7ST4SN00000000
SDI-12 Extended Command Descriptions
aXS! – Get soil type
Returns the current soil type of the HP2.
Response: a<soil><CR><LF>
aXS<soil>! – Set Soil Type
Sets the soil type specified by <soil>. Returns the new soil type of the HP2.
Response: a<soil><CR><LF>
aXP0! – Turn on probe circuitry
Switches on the voltage to the HP2 RF section.
Response: aPROBE:ENABLED<CR><LF>
aXP1! – Turn off probe circuitry
Switches off the voltage to the HP2 RF sections.
Response: aPROBE:DISABLED<CR><LF>
aXM! – Get default measurement set
Returns the <set> specifying the readings returned by the aM! Command.
Response: a<set><CR><LF>
aXM=0! – Set default measurement set to measurement set 0
Sets the default measurement set to
HJFGOKMLN
.
Response: a
HJFGOKMLN
<CR><LF>
aXM=1! – Set default measurement set to measurement set 1
Sets the default measurement set to
FG
.
Response: aFG<CR><LF>
aXM=2! – Set default measurement set to measurement set 2
Sets the default measurement set to
FGHOJ
.
