
Operating Manual
Smart Weather Sensor
104
G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany
19.6.5 Additional Measurement Commands
With the additional measurement commands
aM1! … aM8!
aMC1! … aMC8!
(M-Command, data transmission with CRC)
aC1! … aC8!
aCC1! … aCC8!
(C- Command, data transmission with CRC)
The complete data sets of the Smart Weather Sensor, as defined for the UMB protocol are
available in a SDI-12 environment as well.
The measurement values are ordered according to sensor types.
Equally to the base data sets max. 9 values can be requested with an additional M
command, while an additional C request allows for up to 20 values.
The buffer assignment as documented in the following paragraphs has consequently been
structured in a way that with each M command the buffers D0 and D1 are used. If the
respective sensor type has more values available the buffers D2 up to D4 will be occupied if
required.
M1 / C1
Temperature
M: 9 Values
C: 9 Values
M2 / C2
Humidity
M: 9 Values
C: 13 Values
M3 / C3
Air Pressure
M: 9 Values
C: 9 Values
M4 / C4
Wind
M: 9 Values
C: 14 Values
M5 / C5
Compass
M: 1 Values
C: 1 Values
M6 / C6
WS401/601:
Precipitation,
Leaf Wetness
M: 9 Values
C: 9 Values
Others:
Precipitation
M: 4 Values
C: 4 Values
M7 / C7
WS800-UMB: Global Radiation,
Lightning Sensor
M: 9 Values
C: 10 Values
Others:
Global Radiation
M: 4 Values
C: 4 Values
M8 / C8
Ext. Temperature
M: 1 Value
C: 1 Value
If the sensor type requested with the measurement command is not available with the actual
variant of the Smart Weather Sensor (WS200-UMB ... WS700-UMB) the device will respond
with
a0000<CR><LF>
resp.
a00000<CR><LF>