User guide

H-3521 SDI-12 Command and Response Protocol 5-3
Example of a H-3521 "aM1!" command:
Command Response Time Values Description
"aM1!" "a0044<cr><lf>" 4 sec 4 Make measurement
Subsequent Command Response
"aD0" a+AA.AAAA+BB.B+CCCCCCC.CC+DDDDDDD.DD<cr><lf>
Where:
AA.AAAA = Pressure (PSI)
BB.B = Temperature (C)
CCCCCCC.CC = Raw Pressure A/D Counts
DDDDDDD.DD = Raw Temperature A/D Counts