Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

How is the checksum calculated in NMEA 0183?

April 26, 2017calculated checksum NMEA

0

Posted

How is the checksum calculated in NMEA 0183?

1 Answer

0

Posted

A. The checksum is the 8-bit exclusive OR (no start or stop bits) of all characters in the sentence, including the “,” delimiters, between — but not including — the “$” and “*” delimiters. The hexadecimal value of the most significant and least significant 4 bits of the result are converted to two ASCII characters (0-9, A-F) for transmission. The most significant character is transmitted first.