Gill Instruments Ltd
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MaxiMet
Page 46
Issue 1
Doc. No. 1957-PS-000x
March 2015
SDI-12 Commands with CRC
Note: Unavailable measurements shall be "padded", e.g.: +999.99.
?!
Returns Unit Address (default is 0).
a
Current unit address letter (factory default is 0, range is 0 to 9).
b
New address letter, range 0 to 9.
aAb!
Change unit address from a to b see above.
aMC!
Address, Relative Wind Direction, Relative Wind Speed, Corrected Wind Direction,
Corrected Wind Speed (If GPS fitted), Status and CRC.
aMC1!
Address, Temperature, Relative Humidity, Dewpoint, Pressure, Status and CRC
(GMX600).
aM2C!
Address, Relative Wind Direction, Relative Wind Speed Status and CRC.
aM3C
Address, Precipitation Intensity, Total Precipitation, Status and CRC (GMX600).
aD0
Request a line of the above data.
Command
Description
Response
Example
aMC!
Address, Relative Wind
Direction, Relative Wind
Speed, Corrected Wind
Direction, Corrected Wind
Speed (GPS option unit
only), Status and CRC.
atttn<CR><LF>
a is unit identifier.
ttt is time in seconds.
n is number of data values.
Measurement command to
retrieve a reading of the
maximum time the MaxiMet will
take to complete a
measurement, have data ready
and the number of data values.
00055<CR><LF>
0 is unit identifier.
005 is 5 sec. measurement.
5 is the number of data readings
(Direction, Speed, Corrected
Direction, Corrected Speed and
Status).
0D0!
Retrieve a line of the
above data.
<address><relative wind
direction><relative wind
speed><corrected wind
direction><corrected wind
speed><status>
<CRC><CR><LF>
0+192+000.07+267+999.9+0000DQ^
<CR><LF>
aMC1!
Address, Temperature,
Relative Humidity,
Dewpoint, Pressure,
Status and CRC.
atttn<CR><LF>
00015<CRC><CR><LF>
0D0!
Retrieve a line of the
above data.
<address><temperature>
<relative humidity><dewpoint>
<pressure><status><CRC><CR
><LF
0+023.3+035+007.2+1015.1+0000AiL
<CR><LF>
aMC2!
Address, Relative Wind
Direction, Relative Wind
Speed, Status and CRC.
atttn<CR><LF>
00053<CR><LF>
0D0!
Retrieve a line of the
above data.
a<dir><mag><status><CRC><C
R><LF>
0+168+000.02+0000GbT><CR><LF>
aMC3!
Address, Precipitation
Intensity, Total
Precipitation, Status and
CRC.
atttn<CR><LF>
00053<CR><LF>
0D0!
Retrieve a line of the
above data.
<address><precipitation
intensity><total
precipitation><status><CRC>
<CR><LF
0+000.0+00000.0+0000HB@
<CR><LF>
