Vaisala WXT520 - Manual (Page 79)

Chapter 7 __________________________________________________ Getting the Data Messages
VAISALA_______________________________________________________________________ 77
Example of the response (the parameters included can be chosen
from the full parameter set of the commands aR1, aR2, aR3 and
aR5):
0R0,Dx=005D,Sx=2.8M,Ta=23.0C,Ua=30.0P,Pa=1028.2H,
Rc=0.00M,Rd=10s,Th=23.6C
For selecting the parameter set in the response message, see Chapter 8,
Sensor and Data Message Settings, on page 107 .
Polling with CRC
Use the same data query commands as in the previous sections but type
the first letter of the command in lower case and add a correct three-
character CRC before the command terminator. The response contains
also a CRC. For more information about the CRC-computation see
Appendix C, CRC-16 Computation, on page 161 .
Requesting a wind data message with a CRC:
Command format: ar1xxx
Example of the response (the parameter set is configurable):
0r1,Dn=236D,Dm=283D,Dx=031D,Sn=0.0M,Sm=1.0M,Sx=2.2MLFj
where the three characters before are the CRC for the
response.
where
a
= Device address
r1 = Wind message query command
xxx = Three-character CRC for ar1 command
= Command terminator
NOTE The correct CRC for each command can be requested by typing the
command with an arbitrary three-character CRC.