UART won't connect no matter what I do

[devmichelcastilho]

Armbianmonitor:

https://paste.armbian.com/xuzeyolapi

So I'm trying to connect with a UART cable from my PC to the board (OPI3LTS). Here's what I did so far:
 

In desperation, I double checked every connection, to no avail. My devices are powered separately, so only the RX and TX cable are connected, and they are crossed as they should.

 

Set up permissions:

sudo chmod 666 /dev/ttyUSB0

 

Add user to dialout:

sudo adduser <user> dialout

 

Install minicom:

Set up minicom with the correct address: /dev/ttyUSB0
Set up the correct baud rate (115200 in this case)
Turn off flow control

 

Tried connecting via "screen", minicom and putty, all of them just show me a black CLI I can't write in.

 

Help? 🥲

Edited yesterday at 01:57 PM by devmichelcastilho