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700-SDI-PT-KEL-Man Rev 4 06 Jan 2020
11/19
3.5.1
Acknowledge Active
This command queries whether a sensor is present on the SDI bus at the specified address.
3.5.2
Send Identification
This command is used to query sensors for their SDI-12 compatibility level, model number, and
firmware version number.
Example response: 213KellerAG PR36X 0020000000000001
3.5.3
Change Address
This command changes a sensor’s SDI address.
3.5.4
Address Query
This command requests the address of the SDI sensor.
NOTE:
only one SDI device should be connected to the bus when using this
command; problems arise when several devices respond on the same bus.
STRING
NOTE
Cmd
?!
Request the (single) device on this bus to report its
address
Resp
a
The address of the device
STRING
COMMENT
Cmd
a!
request the device at address
a
to confirm it is active
Resp
a
a device is present at address
a
STRING
COMMENT
Cmd
aI!
Resp
a13KellerAGmmmmmmvvvxx...xx
a
- the sensor address
13 – SDI-12 version number
KellerAG
– 8 character vendor
identification,
mmmmm
- the sensor model number
vvv
– 3 character sensor version
xx..xx
– Serial number, max 13 characters.
STRING
NOTE
Cmd
aAb!
a
= current address
b
= new address
Resp
b
response confirms new address