Can not use the UART3 with Orange PI 3 LTS

Emir0723

Hi everyone,

I was trying to connect my Orange PI 3 LTS board to the Pixhawk flight controller from the UART3 (ttyS3) and UART(debug, ttyS0) ports but I couldn't make it work. I even enabled the UART3 port from booting files and I also disable the bluetooth but no succes yet.

I also connect the UART3 port to my pc with serial and I tried to test it with Minicom/Putty but it was quite a weird. I was able to send text from my PC to Orange PI, but it was all gibberish when I write something from the Orange PI.

I also switch the TX-RX connections, cables, baud rates but no success yet.

Did anyone have the similar problems, can you help me out please?