xxx…xx
= Up to 13 optional characters used for a serial number or other specific sensor
information that is not relevant for operation of the data logger
<CR><LF>
= terminates the response
B.1.3 Start verification command (aV!)
The response to start verification (
aV!
) can include hardware diagnostics, but like the
aI!
command, the response is not standardized.
Command:
aV!
Response:
atttn<CR><LF>
Where
a
= sensor address
ttt
= time, in seconds, until verification information is available
n
= the number of values to be returned when one or more subsequent
D!
commands are
issued
<CR><LF>
= terminates the response
B.1.4 Address query command (?!)
Command
?!
requests an address of the connected sensor. The sensor responds to the query
with the address,
a
. This command should only be used with one sensor on the SDI-12 bus at a
time.
B.1.5 Change address command (aAb!)
Multiple SDI-12 sensors can connect to a single SDI-12 terminal on a data logger. Each device on
a single terminal must have a unique address.
A sensor address is changed with command
aAb!
, where
a
is the current address and
b
is the
new address. For example, to change an address from
0
to
2
, the command is
0A2!
. The sensor
responds with the new address
b
, which in this case is 2.
NOTE:
Only one sensor should be connected to a particular terminal at a time when changing
addresses.
TempVue 20 SDI-12 PT-100 Class A, Precision Air Temperature Sensor
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