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GPS Receiver Error (oops)

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February 13, 1998 12:00AM
The "Rcv Err xx (xx)/yy" message is displayed when the checksum on an NMEA string doesn't match the one calculated by Site Mobile. This happens when characters are lost or corrupted during transmission. The error message always means the same thing, but here's the breakdown of what each of the numbers are:

The first 66 are the exact characters we received from the GPS receiver.
The second 66 (in parentheses) is how we interpreted the characters we got from the receiver. This should always match; if it doesn't, it's probably because one of the checksum characters got lost or corrupted in transmission.
The last number (after the slash) is the checksum we computed for the string we just received. If everything were working, it would match the first two, but you only see this message when it doesn't.

You'll see this error when you don't have a "clean" connection between the receiver and the laptop. This could be something as simple as a loose wire or plug, or it might be RF or electromagnetic interference from the truck's electrical system or something else nearby.

Ron Parker
Software Engineer
Farm Works Software


GPS Receiver Error (oops)

Bryan Black February 13, 1998 12:00AM

GPS Receiver Error (oops)

Ron Parker February 13, 1998 12:00AM

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