Brolin...
Does the break board do anything else but taking the RX TX GND from the usb chip and pass it to the screw connection????
or it has a role like a null modem.
I have tried multiple SILABS and FTDI USB with wired as opposed to a DB9 and connected the TX to the AP input
and GND to GND. the 740b is seeing the USB and now with the 11.1.7 I'm seeing more stuff coming out from NMEA
but there seems to be no handshake being done.
The only difference in your setup and mine is that you are referring to the breakout board and I'm going wire to wire?????
Regards