# NyBoard

When you use a [USB uploader](https://docs.petoi.com/communication-modules/usb-downloader-ch340c) to upload the firmware for the **NyBoard**,  if there is **no** serial port in the port list of Device Manager. 

<div align="left"><figure><img src="https://1565080149-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MQ6a951Q6Jn1Zzt5Ajr-887967055%2Fuploads%2Fmmwsp5E4CO9NqMGwPEYr%2Fimage.png?alt=media&#x26;token=ddb3ec30-fe11-4c5b-926a-fe094499ccb6" alt="" width="375"><figcaption><p>Nybble</p></figcaption></figure> <figure><img src="https://1565080149-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MQ6a951Q6Jn1Zzt5Ajr-887967055%2Fuploads%2F8VTWhrfPoWfAop9lPzsC%2FPlug_in_usb_uploader.jpeg?alt=media&#x26;token=95f3a787-0359-4952-abea-f7b340444fe7" alt="" width="375"><figcaption><p>Bittle</p></figcaption></figure></div>

<figure><img src="https://1565080149-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MQ6a951Q6Jn1Zzt5Ajr-887967055%2Fuploads%2FykxV9hcJGlO2pmBOH0au%2Fimage.png?alt=media&#x26;token=1722a080-f49b-46e9-b0cb-fe2d3b2d4cf6" alt=""><figcaption></figcaption></figure>

Please download and install the USB driver:

* Mac: <http://www.wch-ic.com/download/CH341SER_MAC_ZIP.html>
* Windows: <http://www.wch-ic.com/downloads/CH341SER_EXE.html>
* Linux: <http://www.wch-ic.com/downloads/CH341SER_LINUX_ZIP.html>