Richardco,
if you had provided a bit more details on the other thread you definitly had got a more qualified answer.
The "NMEA-Multiplexer" issue has already been discussed on this forum.
Please use the "Search"
As there is no defined timing between the different talkers I would prefer to have one (small) PIC per Talker to listen to the NMEA sentences and one "MASTER" PIC to combine the different sentences oito one telegram.
That way you don't miss any sentence from any talker, and you can easily convert sentences before you send out the combined telegram to the bus.
regards
Ralph
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