Garbage voice from the UART to USB with Orange PI 3 LTS

[Emir Özmen]

Hi everyone,

I connected my board with my PC via serial USB. Then I opened a serial with minicom and tried to test it out. I can send the strings from my board to PC without any problems but when I write something on the PC it sends garbage to my board.

 

But, if I connect the TX, RX like:

TX->TX

RX->RX

instead of

TX->RX,

RX->TX

it sends normal from the PC and garbage from the board.

 

I checked my baud rates but everything seems legit. I tried both 9600, 115200 bit rates, I also tried the both voltages (5V, 3.3V) What do you think could cause this problem?

 

I saw this thread but seems like there are no solution so far. I would really appreciete it if you can help me out.

Edited February 9, 2023 by Emir Özmen
better explonation

[Emir Özmen]

I just tried out again with right connections (TX -> RX, RX-> TX) and this time it's reversed. This time I can send from my Orange PI 3 with true. But when I tried from my PC it's garbage.

 

You can see the screenshot of the "garbage" text. For example when I click to G it sends L, when I click to H it sends TAB. So unrelated characters like that.

 

Edited February 9, 2023 by Emir Özmen