Originally Posted by xymotic
daisy-chaining devices definitely is fraught with peril.
Parallel connections of up to 3 NMEA
listeners is doable and should not cause a significant voltage drop. The only "peril" may be connecting the devices without consideration for polarity, or the possibility of creating a "ground loop" which I mentioned and gave the solution for.
You may want to download a NMEA Monitor
to check the sentences received at a particular COM Port. There are several free ones available. I use this one if I am working with chartplotting software
that does not have a port monitor
embedded in the software
: Free NMEA Monitor