Please excuse my ignorance. What is “Pin 1”? What can I send a pic of?
Oh my god! That question pushed me in the right direction. I flipped the cable (assuming that was the pin you referred to) and it works now! Wow. I figured it must be something simple / stupid like that. Thanks for the help!
This image (flipped) shows the right way to attach it. The thing unfortunately slides right on either way. I have to eat my words about being 99% sure this was plugged in correctly! Look at the IDC to 9 pin sub D from the accessory kit in the pic. Note how the red stripe on the ribbon is on the opposite side. Hopefully, this saves someone else some time and frustration!
This image (ixora-uart) shows the original connection - which was wrong.
Pin 1 is closest to the silk-screen dot having a square solder pad.
@Najeh Check out my posts, in case you possibly made the same dumb mistake I did.
Yes, glad we found the culprit and thanks for letting us know.