Xylem H-424MS V1.0 - Manual (Page 22)

2-6 SDI-12 Command and Response Protocol
H-424MS
Example of a H-424MS "aI!" command:
"a12 DAA H-424vvvS#nnnnnnVkkk"
H-424MS implementation of the optional 13 character field:
S#nnnnnnVkkk
(12 bytes total)
Where:
"nnnnnn" is a six character sensor serial number
"kkk" is a three digit sensor firmware revision level
Example of a "Change Sensor Address" command:
Command Response Description
------------- ------------------------ ----------------------------
"aA2!" "2" Change sensor address to "2"
2.7 Change Sensor Address
The Change Sensor Address Command allows the sensor address to be changed. The address is
stored in non-volatile EEPROM within the sensor. The H-424MS will not respond if the command
was invalid, the address was out of range, or the EEPROM programming operation failed.
Command Response Description
------------- ------------------------- ---------------------------
"aAn!" "n" Change sensor address
Where:
a is the current (old) sensor address ("0-9", "A-Z", "a-z", "*", "?"). An ASCII
"*" may be used as a "wild card" address if the current address is unknown
and only one sensor is connected to the bus.
A is an upper-case ASCII character.
n is the new sensor address to be programmed ("0-9", "A-Z", "a-z", "*", "?").
NOTE: To verify the new address use the "Identify Command."