
Operating Manual
Compact Weather Station
60
G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany
18.6.2 Command Set
For details of the SDI-12 protocol please refer to the above mentioned standard document.
Following commands are available for devices of the WS family:
Note
: The examples in the following sections use italics to print the requests from the logger
(
0V!
)
Command Function
?!
Address search (Wildcard request, one device only on bus!)
a!
Request device active?
aI!
Request device identification
aAb!
Address change to b ( 0 … 9, A …Z, a … z)
aM!
Measurement basic minimal data set
aM1!
Measurement temperatures
aM2!
Measurement humidity
aM3!
Measurement air pressure
aM4!
Measurement wind
aM5!
Measurement compass
aM6!
Measurement precipitation
aMC!
Measurement, basic minimal data set, transmit values with CRC
aMC1! ...
aMC6!
Measurement (assignment of values as for aMn! commands),
transmit values with CRC
aC!
Concurrent measurement, full basic data set
aC1! ...
aC6!
Concurrent measurement, assignment of values as for aMn!
commands, partly extended data sets
aCC!
Concurrent measurement, transmit values with CRC
aCC1! ...
aCC6!
Concurrent measurement, assignment of values as for aMn!
commands, partly extended data sets, transmit values with CRC
aD0!
Data request buffer 0
aD1!
Data request buffer 1
aD2!
Data request buffer 2
aD3!
Data request buffer 3
aD4!
Data request buffer 4
aR0!
Data request from continuous measurement, data set 0
aR1!
Data request from continuous measurement, data set 1
aR2!
Data request from continuous measurement, data set 2
aR3!
Data request from continuous measurement, data set 3
aR4!
Data request from continuous measurement, data set 4
aRC0!
Data request from continuous measurement, data set 0 with CRC
aRC1!
Data request from continuous measurement, data set 1 with CRC
aRC2!
Data request from continuous measurement, data set 2 with CRC
aRC3!
Data request from continuous measurement, data set 3 with CRC
aRC4!
Data request from continuous measurement, data set 4 with CRC
aV!
Command verification: Evaluate sensor status and heating
temperatures, data request with aD0!, aD1!
aXU<m/u>! Change the unit system for SDI data
aXH+nnnn! Set local altitude of the device for calculation of rel. air pressure