How do I discern Maidenhead Locator from GPS lat long info.

[richard]

this is what i get up to now on the display. But is not stable.

i'm not surprised , given that :-
not all nmea fields are filled in for every message
not all nmea fields are fixed length

I can't think of a more difficult way to approach this task than what you are trying to do.
I can't think of a more difficult to debug approach for this task than what you are trying to do

here is a snap of mine hooked to actual data, it has no trouble keeping up with the 4 or 5 messages
per second that the gps spits out


managed to snap the pic as the message type was updated so it a bit vague as to what its type is/was
and the lat/lon are bogus who would trust the internet these days