Chapter 7 __________________________________________________ Getting the Data Messages
VAISALA_______________________________________________________________________ 71
Example (with CRC):
0r1,Sn=0.1M,Sm=0.1M,Sx=0.1MGOG<cr><lf>
0r5,Th=25.0C,Vh=10.6#,Vs=10.8V,Vr=3.369VO]T<cr><lf>
Automatic Composite Data
Message (aR0)
When automatic composite data messaging is selected, the sensor sends
composite data messages at user configurable intervals. The message
structure is the same as with the composite data query command aR0
and contains a user configurable set of wind and supervisor data.
Example (the parameters included can be chosen from the full
parameter set of the commands aR1 and aR5):
0R0,Dx=005D,Sx=2.8M,Th=23.6C<cr><lf>
For selecting the parameter set in the response message, see Chapter 8,
Sensor and Data Message Settings, on page 95.
Automatic composite data messaging is a concurrent, not an alternate
mode to either the polled or automatic modes.
SDI-12 Protocol
There are two different SDI-12 modes available for providing all the
functionality of the SDI-12 v1.3 standard.
The lowest power consumption is achieved with the Native SDI-12 v1.3
mode (aXU,M=S), as it makes measurements and outputs data only
when requested. In this mode all the commands presented in this
chapter are available except those for the Continuous Measurement.In
SDI-12 v1.3 continuous mode (aXU,M=R) the sensor makes internal
measurements at update intervals configurable by the user, see Chapter
NOTE
Stop the automatic output by changing the communication protocol to
polled mode (aXU,M=P).
Polling commands aR1 and aR5 can be used also in ASCII automatic
protocol for requesting data.
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