Can't access UART0 (pins 99 and 101) as a serial port

[emadomari40]

Device: Jetson Orin nano
OS: Jetpack 5.1

I am using Jetson Orin Nano with a custom PCB design. I using UART0 pins as a serial communication with 115200 baud rate.

I tried all files I have in /dev/tty* to get a result but I could not get any information. How can I access UART0 Tx and Rx from /dev/tty* (eg: ttyTHS0) and what is the default configuration. Lastly, how to change the configuration of the hardware?

[KevinFFF]

Hi emadomari40,

@emadomari40

I using UART0 pins as a serial communication with 115200 baud rate

Do you mean that you are using the following UART0 which is connected from M.2 Key E?

Please share the current dmesg and device tree for further check.

[emadomari40]

Yes, the same UAET which is connected from M.2 Key E. I am not receiving any warning or error. It is just not working and I am not receiving my messages.

[KevinFFF]

Please share the current dmesg and device tree for further check.

[emadomari40]

This is the dmesg:

output.txt (96.2 KB)

[emadomari40]

I did enable uart@3100000 in the device tree file and its workin now on /dev/ttyTHS1