# What is the difference between mini usb port ssh connection and TTL based uart connection in jetson nano

**URL:** <https://forums.developer.nvidia.com/t/what-is-the-difference-between-mini-usb-port-ssh-connection-and-ttl-based-uart-connection-in-jetson-nano/158921>\
**Category:** Jetson Nano\
**Tags:** usb\
**Created:** [November 6, 2020, 7:27am UTC](https://forums.developer.nvidia.com/t/what-is-the-difference-between-mini-usb-port-ssh-connection-and-ttl-based-uart-connection-in-jetson-nano/158921 "2020-11-06T07:27:37Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![sk.ahmed401](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@sk.ahmed401](https://forums.developer.nvidia.com/u/sk.ahmed401)\
**Post date:** [November 6, 2020, 7:27am UTC](https://forums.developer.nvidia.com/t/what-is-the-difference-between-mini-usb-port-ssh-connection-and-ttl-based-uart-connection-in-jetson-nano/158921/1 "2020-11-06T07:27:37Z")

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I would like to know when can I use mini USB port to USB converter and TTL UART to USB connector in jetson nano.

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**Author:** ![DaneLLL](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/danelll/32/14043_2.png) [@DaneLLL](https://forums.developer.nvidia.com/u/DaneLLL)\
**Post date:** [November 6, 2020, 9:24am UTC](https://forums.developer.nvidia.com/t/what-is-the-difference-between-mini-usb-port-ssh-connection-and-ttl-based-uart-connection-in-jetson-nano/158921/3 "2020-11-06T09:24:12Z")

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Hi,  
The micro-B port on Jetson Nano devkit works in device mode only. You have to connect it to a host such as Linux/Windows PC.

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**Author:** ![nadeemm](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/nadeemm/32/367020_2.png) [@nadeemm](https://forums.developer.nvidia.com/u/nadeemm)\
**Post date:** [October 18, 2021, 5:38pm UTC](https://forums.developer.nvidia.com/t/what-is-the-difference-between-mini-usb-port-ssh-connection-and-ttl-based-uart-connection-in-jetson-nano/158921/5 "2021-10-18T17:38:50Z")

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