Difficulties getting serial access about wibox

[duhow]

You should get at least serial messages from u-boot (when powering on the board).
If you don't, check the solder, and your USB/TTL adapter (permissions, speed to baud-rate 115200)

After u-boot, if you don't get any messages, check #14 (comment) .

I will update this into docs shortly.

[gtrabanco]

You should get at least serial messages from u-boot (when powering on the board). If you don't, check the solder, and your USB/TTL adapter (permissions, speed to baud-rate 115200)

After u-boot, if you don't get any messages, check #14 (comment) .

I will update this into docs shortly.

I will check

[gtrabanco]

I have connected positive (red) and negative (brown) of the board to external Power Supply of 18V.

Is the ground of the USB-TTL converter also connected to the ground of the external power supply? It can't work if the potentials are different.

The ground of TTL is connected to the ground of the board only.

[gtrabanco]

I removed the soldering and tried with 2mm pins with same result. It should be something with the soldering I have done wrong so I am closing the issue.

[gtrabanco]

I managed to receive something after change the soldering and tried many pins but I just see a lot of characters...

I have received similar issues with CISCO routers due baud rate but I think this is not posible because it is the same board for all of us and similar software.

I tried no flow with: screen -fn /dev/ttyUSB0 115200 but I have the same problem. Do you have any clue?

Do I need a resistor or similar in GND or TX, RX (I know almost nothing about electronics)?

[gtrabanco]

When I messure the Voltage in TX it gives me values between 0 and 3.5V and RX between 0 and 1.5V

[duhow]

Make sure GND is properly solded / connected, and in serial, disable "hardware flow" (if applicable).
You may want to try with another USB TTL?

[gtrabanco]

Make sure GND is properly solded / connected, and in serial, disable "hardware flow" (if applicable). You may want to try with another USB TTL?

I tried different TTL.

I used this kind of wiring this time due my (better not to do) soldering abilities:

But if It still can be the wiring is clear that's the problem 😅 I will look for someone that can do the soldering for me near me =)

Thank you @duhow