# Processing Serial. list() no show anything

**URL:** <https://discourse.processing.org/t/processing-serial-list-no-show-anything/33714>\
**Category:** Electronics (Arduino, etc.)\
**Created:** [November 24, 2021, 12:03pm UTC](https://discourse.processing.org/t/processing-serial-list-no-show-anything/33714 "2021-11-24T12:03:10Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jun](https://avatars.discourse-cdn.com/v4/letter/j/8e7dd6/32.png) [@jun](https://discourse.processing.org/u/jun)\
**Post date:** [November 24, 2021, 12:03pm UTC](https://discourse.processing.org/t/processing-serial-list-no-show-anything/33714/1 "2021-11-24T12:03:10Z")

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Hi, I have had this problem for quite a long time, processing can’t find my serial list, even I

> `printArray(Serial.list());`

it shows nothing. Can I ask how to solve it? Or anyone knows how processing detects serial, maybe is my PC problem so I can further find my problem. Thx.

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<div class="post-metadata">

**Author:** ![glv](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/glv/32/18785_2.png) [@glv](https://discourse.processing.org/u/glv)\
**Post date:** [November 24, 2021, 12:21pm UTC](https://discourse.processing.org/t/processing-serial-list-no-show-anything/33714/2 "2021-11-24T12:21:23Z")

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Hello,

Operating system?  
Are you using the Processing IDE from here?  
_[processing.org](http://processing.org)_  
Which version?

Do you have a serial COM port to detect and list?  
Check your Device Manager if using Windows:

![image](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/2X/d/d7c008b38e6c0cfd7aaecf8588efe335ce313425.png)

With an Arduino connected I see this:

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/2X/8/81160e36fcea023c179d96560e8aa520cfcf69ea.png)

When I disconnect the Arduino I see this:

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/2X/0/06db6a5775a992b16cb26e9252a63b756e76cd84.png)

`:)`