5
LISST-ABS SDI-12 Command Summary
Command Name
Command Code Notes
Address Query
?!
Request address of single sensor on bus
Acknowledge Active
a
!
Request response from sensor at
address
a
Change Address
a
A
b
!
Change address of sensor at address
a
to
b
Send Identification
a
I!
Send ID string including SI address, SDI
version, Manufacturers ID, sensor model,
sensor Firmware version and device
serial number
Start Measurement
a
M!,
a
MC!
a
M1!,
a
MC1!
a
M2!,
a
MC2!
a
M3!,
a
MC3!
a
M4!,
a
MC4!
Start a measurement, returns number of
seconds till sample is ready to be read.
Sends service request when
measurement is complete. An M
command returns a single 1 second
average. M1, M2, M3, and M4 return a
30, 60, 120, or 300 second average.
C following a command requests a CRC
code in the data return (D command).
Start Concurrent
Measurement
a
C!,
a
CC!
a
C1!,
a
CC1!
a
C2!,
a
CC2!
a
C3!,
a
CC3!
a
C4!,
a
CC4!
Same as Start Measurement command
except does not send service request.
Send Data
a
D
b
!
Requests output
b
(0-9) from Sensor
a
Continuous Measurements
(Read)
a
R!
Not supported
Start Verification
a
V!
Not Supported
See the next page for details of SDI-12 commands.
Содержание LISST-ABS
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