Originally Posted by GTom
I intend to connect the B100 AIS via USB, easy. But others will need an RS422 hat which I have to do some more research
I depends. Plenty of lower end equipment
uses 232 (in, out, gnd vs. in+, in-, out+, out- aka 3-wire vs. 4 wire). 232 is 3 wire 422 is 4 wire. Each is 2 wire when wired one way BUT most of the time not interoperable.
As long as your main processing unit accepts multiple inputs at varied speeds you are fine. But do make sure your mpu can generate a single
out stream towards desired port at the highest of the input speeds (often the ais speed 38k).
Some people use BT out. But myself had too much trouble with pairings lost
etc. and stay with wifi since.