User guide

5-12 SDI-12 Command and Response Protocol H-3521
5.11 Extended Read/Write Stage Digits
This is for reading or writing the stage digits to the right of the decimal point. The stage digits by
default is set to 2.
Command Response Description
“aXRSD!” “a0011<cr><lf>” Read Stage Digits
“aXWSDd!” “a0021<cr><lf>” Write Stage Digits
Where: a is the sensor address ("0-9", "A-Z", "a-z", "*", "?").
XRSD are upper case characters.
XWSD are upper case characters.
d is the new enable value(0-9)
Example of a H-3531 Extended "Read Stage Digits" command:
Command Response Time Values Description
"aXRSD!" "a0011<cr><lf>" 1 sec 1 Read Stage Digits
Command Response Description
"aD0!" "a+2<cr><lf>" Stage digits = 2
Example of a H-3531 Extended "Write Stage Digits" command:
Command Response Time Values Description
"aXWSD3!" "a0021<cr><lf>" 2 sec 1 Set Stage digits to 3
Command Response Description
"aD0!" "a+3<cr><lf>" Stage digits = 3