---
title: "Protocol to update app by uart?"
url: "https://maker.wiznet.io/forum/11835"
markdown_url: "https://maker.wiznet.io/forum/11835/md"
type: "Forum topic"
category: "Wireless"
author: "phil31"
created: "2016-05-05T08:47:54+09:00"
last_activity: "2017-05-04T08:38:46+09:00"
language: "en"
views: 659
replies: 1
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# Protocol to update app by uart?

## Question

Asked by phil31 on 2016-05-05 in Wireless.

Dear

please where i can find the protocol required to update wizfi250 firmware by uart with our CPU application (not with WIZSmartScript)?

thanks, regards

## Replies

### Reply 1 by ssekim, 2016-05-08

Hi Phil31

You can do that with YMODEM option.

Please refer to the below link.
It’s writtern in Korean but you can understand it.

[url][http://ilikethisplus.tistory.com/6\[/url\]](http://ilikethisplus.tistory.com/6%5B/url%5D)

Steve

---

Source: https://maker.wiznet.io/forum/11835