Vaisala WXT530 Series - SDI-12 Communications Protocol

C.2
NMEA 0183 v3.0 Checksum
Computation
The checksum is the last field in the NMEA sentence and follows the checksum delimiter
charac
ter "*". It is the 8-bit exclusive OR of all characters in the sentence, including "," and
"^" delimiters, between but not including the "$" or "!" and the "*" delimiters. The
hexadecimal value of the most significant and least significant four bits of the result is
converted to two ASCII characters (0-9,A-F) for transmission. The most significant character
is transmitted first.
WXT530 Series User Guide M211840EN-D
180
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