Campbell Scientific EnviroSCAN Sentek Water Content Profile Probe - Manual (Page 41)

Appendix E. SDI-12 Commands
The SDI-12 EnviroSMART probe interface communicates with Campbell
Scientific dataloggers by way of SDI-12 protocol. A complete treatment of
SDI-12 communications for the EnviroSMART is available from Sentek or
Campbell Scientific in the EnviroSMART & EasyAG SDI-12 Probe Interface
Manual. Commonly used commands are listed below. Refer to Edlog and
CRBasic help for information on how to use these commands while
programming Campbell Scientific dataloggers.
The EnviroSMART probe interface accepts SDI-12 addresses in the range of
“0” to “9”, “A” to “Z”, and “a” to “z”.
SDI-12
Command*
Function
aAb! Change address (for use in terminal emulator)
aM! Read soil moisture values 1 to 9
aM1! Read soil moisture values 10 – 16
aM2! Read salinity values 1 to 9
aM3! Read salinity values 10 to 16
*where “a” is the probe address
E-1