NVIDIA Jetson Orin Nano - Serial Console

NVIDIA®Jetson Orin Nano™
Introduction
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Jetpack 5.X
Getting Started Flashing the board using GUI Installer JetPack Components Kernel Compile CMD flash Performance Tuning Evaluating Performance Set Values Manually Tuning Power Maximizing Performance
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Using UART Serial communication

You can access the Orin Nano using a TTL USB to UART converter. You just have to connect the TX, RX and ground of your TTL adapter to the respective pins available in the board. Those pins are labeled as RX and TX in the back side of the board, as shown in the next figure in the section 11 of connectors. From right to left the pins 3 and 4 are RX and TX respectively.

Port USB-Type C.

Once you have connected the TTL to your board, continue with the section Using minicom.

Using minicom

To use minicom for accessing the debug port, make sure you have installed minicom on your PC:

apt install minicom

and then open minicom on your PC with the corresponding parameters:

sudo minicom -D /dev/ttyUSB0 -8 -b 115200

If you have trouble accessing the /dev/ttyUSB0 device, it may be related to the ownership of the serial port device. It is usually owned by root, but available to the dialout group:

$ ls -al /dev/ttyUSB0*
crw-rw---- 1 root dialout 188, 0 Aug 10 15:17 /dev/ttyUSB0

You can either add your user to the dialout group:

sudo addgrp $USER dialout

You may need to log-out and log back in for the group change to be applied.

How to set up and use minicom

When you have the setup ready and you have connected to the corresponding serial port, you'll be able to watch the full output of the startup process from the early stages, including the bootloader debug:

[0000.086] I> MB1 (prd-version: 1.0.0.0-t194-41334769-a3872862)
[0000.091] I> Boot-mode: L0 coldboot
[0000.094] I> chip revision : A02 
[0000.097] I> Bootrom patch version : 7 (correctly patched)
[0000.102] I> ATE fuse revision : 0x200
[0000.106] I> Ram repair fuse : 0x0
[0000.109] I> Ram Code : 0x0
[0000.111] I> rst_source : 0x0
[0000.114] I> rst_level : 0x0
[0000.118] I> Boot-device: eMMC
...

USB-C

To use the USB type C port to access serial control connect the cable to the port 8 shown in the following image

Port USB-Type C.

Connecting this port to a PC running Ubuntu using a USB-C cable will register one serial port in the PC. They will be assigned the device /dev/ttyACM0, assuming no other /dev/ttyACMn existed before the connection. This will only work if the board is connected to the power supply but will work even if it is not powered up.

To connect to the debug port on the Developer Kit, any serial console interface can be used.

Using minicom

You can use minicom for accessing just like you use in the UART Serial access. See the UART Serial step to see how to use the minicom.