Dear Forum, We would like to know how to enable the USB OTG interface (type C) into host mode for communicating with external MCU via USB to UART converter in normal booting for example, please ? Is it feasible to do that via firmware /software (device-tree, sysfs, …) or necessary to modify the ha…

Hi, You may need to read what you just posted carefully. The post you shared from 2023 was actually a “host mode” only type C port. It does not truly enable OTG… Their design is USB2-1 + USB3-1. Their port is not involved with flashing port. For OTG mode, it is not just about how your hardwar…

Hardcoded to host mode is possible but still may need to check your hardware design to see how your USB type C is implemented. Below document for modifying device tree. GND_DRAIN - Jetson AGX Orin Platform Adaptation and Bring-Up — NVIDIA Jetson... This guide describes how to port the…

and want to clarify again. Modifying device tree may lead to system crash. lacking of UART debug console on the board might lead to difficulties.

Hi @WayneWWW , Thanks for reminding about the UART DEBUG. We also plan to add it. And for additional information, the current USB-3.0 block is as below : [ATSD_USB30]

Hi @WayneWWW , How can I check this by software in the running Tegra Linux? My current SOM is Jetson Orin NX and custom carrier board recognized by the sdkmanager, and I used this later to flash the Jetpack-5.1.5 onto it. Therefore, the BSP firmware is the default one from Nvidia for this SOM. Be…

HI @WayneWWW Sorry to bother you. I tested myself to dynamically switch btw modes and they worked : # echo host > /sys/class/usb_role/usb2-0-role-switch/role In default mode : # cat /sys/class/usb_role/usb2-0-role-switch/role none

I have one question here. What is the exact thing that you want to do here? Do you want your current type C port untouched and just one to connect a USB device to it and make your Jetson as host mode? If so, then why are you doing mode change by yourself? I mean, a correct OTG solution won’t…

Hi @WayneWWW , What I expected were : The OTG type C port became the host mode automatically in normal boot and and to be used for connecting a keyboard and mouse (via an external USB hub). The OTG type C port became the device mode automatically in normal boot when I connect a cable to the PC (i…

Then it is back to what I just said in previous comment. [image] How to switch USB OTG to host mode? Jetson Orin NX Just want to clarify. What is your current configuration in the device tree? I mean, enabling such design on a custom board is much difficultie…

Hi @WayneWWW , I checked with HW team and effectively there’s difference btw the custom board vs the orin nano devkit at least in term of the mux IC for the USB3 type C block. I will investigate more on this difference relevant to the reason why the mode detection/switching did not happen automatic…

How to switch USB OTG to host mode?

Robotics & Edge Computing Jetson Systems Jetson Orin NX

WayneWWW August 13, 2026, 4:19am 6

Just want to clarify. What is your current configuration in the device tree?

I mean, enabling such design on a custom board is much difficulties than hardcoded a host mode…

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How to switch USB OTG to host mode?

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