5 COMMUNICATION SRS Sensors
among others, also support SDI-12 Communication. Direct SDI-12
communication is supported in the “Terminal Emulator” mode un-
der the “Tools” menu on the “Connect” screen. Detailed information
on setting the address using CSI data loggers can be found on our
website at http://www.decagon.com/support/downloads/.
The sensor can be powered using any voltage from 3.6 to 15 V DC.
The SDI-12 protocol allows the sensors to be continuously powered,
so the power (white wire) can be connected to a continuous 12 VDC
source. However, the sensor can also be used with a switched 12 V
source. This can help reduce power use (although the SRS uses very
little power, 0.03 mA quiescent) and will allow the sensor array to
be reset if a problem arises.
Reading the SRS in SDI-12 mode using a CSI data logger requires a
function call. An example program from Edlog and CRBasic can be
found in the software section of http://www.decagon.com/support/.
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