2020-11-28, 12:10 PM
(2020-11-28, 12:08 AM)Peter— Wrote: Ironman, don’t go an burn your st2000. I can plug an 422 adapter into my raspberry or esp32 so I don’t need to use the tx gpios
Why do I need an isolated 422 when the raymarine nmea is isolated?
To satisfy my curiosity I'd burn anything ;-) curiosity leads to knowledge.
Your enthousiasm is a dangerous thing though, at this stage ;-). You are right the ST4000 nmea-in is isolated; if you stick to outputting to it, you'll be fine. That module, though, also caters for reading from a nmea-out from some other instrument. If you venture into that in the future, you might be at risk of creating a ground loop. Spending a few bucks extra now might keep you from harm then. Hence the conservative advice.