Operating Instructions
Combined Wind Sensor ARCO SDI-12
(14582) ARCO SDI-12
Operating Instructions
Syntax
Command
Answer
aAb!
b<CR><LF>
a
– Old sensor address
b
– New sensor address
A
– Command ‘Change Address’
b
– New sensor address
!
– End of command
<
CR><LF>
– End of answer
Example:
Command
Answer
0A1!
1<CR><LF>
Start Measurement - aM!
The "
aM!
" command requests the sensor to process the available measurement data and write them to an output
string. Unlike the standard sensors described in the SDI-12 documentation, the ARCO SDI-12 measures continu-
ously. This is why the ARCO SDI-12 always responds with "
a000
". The data is therefore immediately available.
This is also the reason why the ARCO SDI-12 does not send a "service request" and ignores measurement inter-
ruption commands. The data can be retrieved with the command "
aD0!
" (see below under "Send data"). The data
is not overwritten until the next "
C
" or "
M
" command and can be retrieved several times.
Syntax
Befehl
Antwort
aM!
a0004<CR><LF>
a
– Sensor address
a
– Sensor address
M
– Command "Start Measurement"
000
– Seconds the sensor needs until the
measured data can be returned
(= 0 s – Data immediately available)
04
– Number of provided measured data
!
– End of command
<CR><LF>
– End of answer
Example:
Command
Answer
1M!
10004<CR><LF>mos
The measured data can be requested with the commands
aD0!
and
aD1!
(see
Send Data
).
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