I’m using Orin Nano and try to connnect a USB-TTY cable to debug some boot issue. I can use minicom to connect ttyTHS0 and send recieve messages successfully. (both pc client and minicom boudrate are 115200) I enabled the earlycon by adding “earlycon=uart8250,mmio32,0x03100000” to the boot cmdline…

May I know why you don’t use default debug UART (UART2, /dev/ttyTCU0)? If you want the log output from the 3 pins you mentioned, you could refer to the following thread to achieve. Orin NX Uart Problem - #7 by KevinFFF

How to enable Orin Nano earlycon?

Robotics & Edge Computing Jetson & Embedded Systems Jetson Orin Nano

KevinFFF July 31, 2023, 2:40am 3

Hi archman,

Are you using the devkit or custom board for Orin Nano?

Which UART interface you are using? (uarta, uartb, uartc)
Please refer to the following thread for the mapping for UART interface.
OrinNX : How to check UART is working? - #3 by KevinFFF

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How to enable Orin Nano earlycon?

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