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Vaisala WXT532 - SDI-12 Protocol Introduction

Vaisala WXT532
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User’s Guide ______________________________________________________________________
98 __________________________________________________________________ M211840EN-C
Automatic Mode
When the automatic ASCII protocol is selected the transmitter sends
data messages at user configurable update intervals.
The message structure is the same as with data query commands aR1,
aR2, aR3, and aR5. You can choose an individual update interval for
each sensor. See Chapter 8 Sensor and Data Message Settings, on page
127.
Example:
0R1,Dm=027D,Sm=0.1M<cr><lf>
0R2,Ta=74.6F,Ua=14.7P,Pa=1012.9H<cr><lf>
0R3,Rc=0.10M,Rd=2380s,Ri=0.0M,Hc=0.0M,Hd=0s,
Hi=0.0M<cr><lf>
0R5,Th=76.1F,Vh=11.5N,Vs=11.5V,Vr=3.510V<cr><lf>
Example (with CRC):
0r1,Sn=0.1M,Sm=0.1M,Sx=0.1MGOG<cr><lf>
0r2,Ta=22.7C,Ua=55.5P,Pa=1004.7H@Fn<cr><lf>
0r3,Rc=0.00M,Rd=0s,Ri=0.0MIlm<cr><lf>
0r5,Th=25.0C,Vh=10.6#,Vs=10.8V,Vr=3.369VO]T<cr><lf>
NOTE
Stop the automatic output by changing the communication protocol to
polled mode (aXU,M=P).
You can also use polling commands aR1, aR2, aR3, and aR5 in
ASCII automatic protocol for requesting data.

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