Campbell Scientific CS475, CS476, and CS477 Radar Water Level Sensor - Manual (Page 40)

Appendix B. SDI-12 Commands/Changing Settings
TABLE B-1. SDI-12 Commands
Function SDI-12 Command
Address Query ?!
Send Identification aI!
Acknowledge Active a!
Change Address aAb!
Where a is the current address and b is the
new address.
Start Verification aV!
Start Measurement aM!
Start Measurement and
Request CRC aMC!
Send Data aD0!...aD9!
Additional Measurements aM1!...aM9!
Additional Measurement and
Request CRC aMC1!...aMC9!
Start Concurrent
Measurement aC!
Start Concurrent
Measurement and Request
CRC aCC!
Additional Concurrent
Measurements aC1!...aC9!
Additional Concurrent
Measurements and Request
CRC aCC1!...aCC9!
Start False Echo Learn aXSFEL+n!
n = distance necessary to clear the obstruction
Set Power n Operation Mode aXSPOM+n!
n = 2 (auto), 1 (on), or 0 (off)
Get Power Operation Mode aXGPOM!
2 = auto; 1=on; 0=off
Get Water Conditions aXGWC!
n = 0 (auto), 1 (smooth) 2 (medium), or 3
(rough)
Set Water Conditions aXSWC+n!
n = 0 (auto), 1 (smooth) 2 (medium), or 3
(rough)
Where n is the new water condition.
Set Water Stage aXSS+n!
n = floating point number that is the initial
stage or level of the water surface above the
reference.
Where n is the new water stage.
Get Unit aXGU!
0 = meters; 1=feet
Set Unit aXSU+n!
n = 0 (meters) or 1 (feet)
Where n is the new unit of measurement.
Reset Sensor aXRS!
0 = reset unsuccessful; 1=reset successful
Resets the sensor to its factory settings.
B-2