I am trying to test the RS232 and RS485 operation but can’t find any information regarding port mapping.
/dev shows serial1 & serial2
I have tried both without any success,
My main platform is Codesys, but I also have Node-Red available.
RS232 is just for terminal printing, RS485 has operational ModBus RTU devices.
I suspect the 2 ports are not actually mapped as serial ports. It’s looks like they could be USB ???
RPi-config has serial enabled, but without knowing what /dev/? The RS232 & RS485 ports are I’m stuck ?