Gill MetPak II, User Manual

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Operation
MetPak II User Manual
©
Gill Instruments Ltd Last Change
Page 28 20 August, 2010
3.2.3 SDI-12 Commands
Command Summary

aM! Wind speed/direction (Wind Speed in Metres/Sec, Direction in
Degrees) and 2 digit Status Code.

aM1! Temperature (Degrees C).

aM2! Pressure (Hecto-Pascals/Milli-bars).

aM3! Humidity (%).

aM4! Dew Point (Degrees C).
 aM5! For future use.

aM6! For future use.

aM7! For future use.

aM8! For future use.
 aM9! Power Supply Voltage (Volts).

aD0! Request a line of the above data.
Command Details
Command Description Response Example
am! Command for
Wind speed/direction
(Wind Speed in
Metres/Sec, Direction in
Degrees) and Status
Code.
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
MetPak II will take to complete a
measurement, have data ready and the
number of data values.
00053<CR><LF>
0 is unit identifier.
005 is 5 sec. measurement.
3 is the number of data
readings (Speed, Direction
and Status).
0D0! Retrieve a line of the
above data. a<dir><mag><status><CR><LF> 0+156+000.46+00<CR><LF>
am1! Temperature (Degrees C) atttn<CR><LF> 00051<CR><LF>
0D0! Retrieve a line of the
above data. a<temperature><CR><LF> 0+26.2<CR><LF>
am2! Pressure (Hecto
Pascals/Millibars) atttn<CR><LF> 00051<CR><LF>
0D0! Retrieve a line of the
above data. a<pressure><CR><LF> 0+1019.1<CR><LF>
am3! Humidity (%) atttn<CR><LF> 00051<CR><LF>
0D0! Retrieve a line of the
above data. a<humidity><CR><LF> 0+37.7<CR><LF>
am4! Dewpoint (Degrees C) atttn<CR><LF> 00051<CR><LF>
0D0! Retrieve a line of the
above data. a<dewpoint><CR><LF> 0+10.7<CR><LF>
am9! Power Voltage (Volts) atttn<CR><LF> 00051<CR><LF>
0D0! Retrieve a line of the
above data. a<voltage><CR><LF> 0+12.0<CR><LF>