---
title: "Hardware Flow Control (CTS/RTS) does not work in command mode."
url: "https://maker.wiznet.io/forum/13563"
markdown_url: "https://maker.wiznet.io/forum/13563/md"
type: "Forum topic"
category: "Serial-to-Ethernet & ConfigTool"
author: "icabrera"
created: "2019-11-06T15:59:30+09:00"
last_activity: "2019-11-06T15:59:31+09:00"
language: "en"
views: 448
replies: 0
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# Hardware Flow Control (CTS/RTS) does not work in command mode.

## Question

Asked by icabrera on 2019-11-06 in Serial-to-Ethernet & ConfigTool.

Hello.

In firmware 1.2.6 I succesfully activated hardware flow control using FL2.

But in command mode this flow control does not work as expected. Set RTS as low does not stop the data flow from WIZ750. Only in data mode, the flow control work as expected.

Thanks.

---

Source: https://maker.wiznet.io/forum/13563