# How to use USB to serial on comet **URL:** \ **Category:** KVM\ **Tags:** KB\ **Created:** [June 3, 2025, 7:38am UTC](https://forum.gl-inet.com/t/how-to-use-usb-to-serial-on-comet/59416 "2025-06-03T07:38:42Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![robotluo](https://forum-assets.gl-inet.com/user_avatar/forum.gl-inet.com/robotluo/32/17434_2.png) [@robotluo](https://forum.gl-inet.com/u/robotluo)\ **Post date:** [June 3, 2025, 7:38am UTC](https://forum.gl-inet.com/t/how-to-use-usb-to-serial-on-comet/59416/1 "2025-06-03T07:38:42Z")
I use CP2102 USB to TTL chip. For testing, I directly loop back TX and RX. ![lQDPJxa3KEWSr2fNA8DNBQCwL0vmonOivcQIHsvgdZ4oAA_1280_960](https://forum-static.gl-inet.com/original/3X/9/7/9740f307bad860fecac2e207e1fd63b2864265fc.jpeg) Connect the serial port to comet's USB2.0 interface ![lQDPJwCL6RQikGfNBQDNA8CwDv3piDEAx1QIHsvhetmxAA_960_1280](https://forum-static.gl-inet.com/original/3X/9/5/95d14d3ae3ebf8ccfa318560003089843b7ce881.jpeg) Enter comet's terminal and check the newly added serial port device, which is usually ttyUSBX ![1748934526616_44DAF085-0EC3-4344-8AE2-C2AC2B528379](https://forum-static.gl-inet.com/original/3X/e/c/ecffff7338b838fc84673d5ba46db4a01444ad8e.png) ![image](https://forum-static.gl-inet.com/original/3X/f/f/ff963ee7bfe61e9d9d5f0bbbdbab9906a4040612.png) Use `minicom -s` command to make necessary configurations. Usually, you need to modify the device path and flow control configuration. You can find the use and configuration of minicom [here](https://linux.die.net/man/1/minicom). ![1748934329291_14F4F565-E054-4121-B01E-C9386E2869B8](https://forum-static.gl-inet.com/original/3X/8/c/8c2907eb566d1952e45ad9c5a6edc8e655971612.png) After the configuration is completed, you can start using the serial port device. Since my TX and RX are looped, the input content will be directly output. ![image](https://forum-static.gl-inet.com/original/3X/b/4/b44a9a866434749612cfe2f135bbb959d375ea55.png) ---
**Author:** ![bruce](https://forum-assets.gl-inet.com/user_avatar/forum.gl-inet.com/bruce/32/35649_2.png) [@bruce](https://forum.gl-inet.com/u/bruce)\ **Post date:** [November 5, 2025, 10:01am UTC](https://forum.gl-inet.com/t/how-to-use-usb-to-serial-on-comet/59416/2 "2025-11-05T10:01:13Z")
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**Author:** ![bruce](https://forum-assets.gl-inet.com/user_avatar/forum.gl-inet.com/bruce/32/35649_2.png) [@bruce](https://forum.gl-inet.com/u/bruce)\ **Post date:** [November 5, 2025, 10:01am UTC](https://forum.gl-inet.com/t/how-to-use-usb-to-serial-on-comet/59416/4 "2025-11-05T10:01:16Z")
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**Author:** ![mh33](https://forum-assets.gl-inet.com/letter_avatar_proxy/v4/letter/m/bbce88/32.png) [@mh33](https://forum.gl-inet.com/u/mh33)\ **Post date:** [November 6, 2025, 5:15pm UTC](https://forum.gl-inet.com/t/how-to-use-usb-to-serial-on-comet/59416/5 "2025-11-06T17:15:09Z")
I’m hoping to be able to console into network equipment using this. I’m running into two issues: 1. I have tried two usb cables I have, and nether one is showing up as ttyUSBx. 2. minicom is not reconized at the bash command. It is giving the error: ---
**Author:** ![\_zhang](https://forum-assets.gl-inet.com/letter_avatar_proxy/v4/letter/_/e68b1a/32.png) [@\_zhang](https://forum.gl-inet.com/u/_zhang)\ **Post date:** [November 13, 2025, 8:43am UTC](https://forum.gl-inet.com/t/how-to-use-usb-to-serial-on-comet/59416/6 "2025-11-13T08:43:00Z")
> **[RM1PE-1.7.0release1.img](https://drive.google.com/file/d/1ywZVzZIEIY8QU4IoYzykADZ1cVvZPlVA/view?usp=drive_link)** > > Google Drive file. Please try this firmware; I've added the minicom tool based on 1.7.0 release 1. ---
**Author:** ![mh33](https://forum-assets.gl-inet.com/letter_avatar_proxy/v4/letter/m/bbce88/32.png) [@mh33](https://forum.gl-inet.com/u/mh33)\ **Post date:** [November 13, 2025, 4:01pm UTC](https://forum.gl-inet.com/t/how-to-use-usb-to-serial-on-comet/59416/7 "2025-11-13T16:01:39Z")
Thanks! Minicom is working with that firmware update Now if I can find a USB network console cable that is reconized, this thing would be an awesome “smart hands in a box” for remote sites