---
title: "[From QnA]WIZ107SR lost data"
url: "https://maker.wiznet.io/forum/9486"
markdown_url: "https://maker.wiznet.io/forum/9486/md"
type: "Forum topic"
category: "Serial-to-Ethernet & ConfigTool"
author: "jameskim"
created: "2013-09-08T23:42:41+09:00"
last_activity: "2017-05-04T08:29:52+09:00"
language: "en"
views: 441
replies: 0
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# [From QnA]WIZ107SR lost data

## Question

Asked by jameskim on 2013-09-08 in Serial-to-Ethernet & ConfigTool.

## This post came from QnA of WIZnet Homepage

I have problems with lost data, when I try to sent larger blocks of data to serial input of WIZ107SR I lost some data.
I tested it with 1024 bytes and only when I used speed 2400 Bd I got whole data.
When I used speed 9600 Bd, I got only 1019 bytes, when I used 115200 Bd I got only 992 bytes.
I tried to activate Flow control CTS/RTS but it didn’t help - RTS never changed its state. How does flow control work?

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Source: https://maker.wiznet.io/forum/9486