Raspberry Pi 4 not connecting via Serial Port to i3 Mk3s+

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21

Alright, so upon jumping the pins, not much changed. However, that isn't to say that nothing changed.

When I ran minicom -D /dev/ttyAMA0, this is what I got. (I ran this in a linux shell to see the non-ASCII characters)
image
These three characters would be typed no matter what keys I pressed. They would appear three at a time, after I pressed three keys with no response.
Not sure what this means, sorry if it isn't useful.

22

Shouldn't the path be /dev/ttyS0 or /dev/serial0?

23

Yes, I know. But the only thing that changed when I jumped the pins properly was the output on /dev/ttyAMA0. /dev/serial0 and /dev/ttyS0 yielded nothing new.

One thing that might be worth noting is when I ran ls -al /dev, I saw these among the rest:

...
serial0 -> ttyS0
serial1 -> ttyAMA0
...
24

So then at this point I'd test against another Pi.