Accubar SDI-12 Barometric Pressure Sensor Operations & Maintenance Manual Rev-B 30 Nov 2017
pg. 30
Command Description Command Syntax
(command underlined)
Sensor response (underlined)
"a" represents the single-character address
MC6
Request Temperature
and Pressure
Measurement with
CRC-16
aMC6!
aD0!
attt04
ttt is the time in seconds until the measurement
is ready and 04 is the number of values that can
be collected
a
service request
atupvC
where t is the temperature, u is the temperature
units, p is the pressure, v is the pressure units,
and C is the 3 character CRC. Use the XUT
command to set the temperature units and the
XUP command to set the pressure units.
MC7
Request factory
calibration Pressure
and Temperature
Measurement with
CRC-16
aMC7!
aD0!
attt02
ttt is the time in seconds until the measurement
is ready and 02 is the number of values that can
be collected
a
service request
aptC
where p is the pressure in mB, t is the
temperature in degrees Celsius, and C is 3
character CRC.
R0
R1
.
.
.
R9
Request
Continuous
Measurement
Readings
aR0!
aR1!
.
.
.
aR9!
a
Unit only returns its address because it
does
not provide continuous measurements
.
V
Initiate Verify
sequence
aV!
aD0!
attt5
indicating that the command will be complete in
ttt seconds and 5 values can be collected.
a
service request
arespu
where r is the ROM checksum, e is the EEROM
checksum, s is the number of resets since power
up, p is the number of power ups, and u is the
number of unexpected interrupts.
