---
title: "HW_TRIG pull down time, enter CMD mode"
url: "https://maker.wiznet.io/forum/13391"
markdown_url: "https://maker.wiznet.io/forum/13391/md"
type: "Forum topic"
category: "Serial-to-Ethernet & ConfigTool"
author: "ExtSol"
created: "2019-07-14T20:08:43+09:00"
last_activity: "2019-07-15T13:59:28+09:00"
language: "en"
views: 570
replies: 2
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# HW_TRIG pull down time, enter CMD mode

## Question

Asked by ExtSol on 2019-07-14 in Serial-to-Ethernet & ConfigTool.

Hi,

I bought WIZ107SR module.

Process no1:

- After power on, i started both nRESET and HW_TRIG pin low state

- wait 100ms

- set nRESET pin to high

- wait 1000ms
  and the serial commands not working.

Process no2:

- After power on, i started both nRESET and HW_TRIG pin low state

- wait 100ms

- set nRESET pin to high

- wait 3000ms
  and the serial commands now working fine.

How long time to keep HW_TRIG pin low state before the module entering CMD mode?

## Replies

### Reply 1 by scott, 2019-07-15

Dear ExtSol

It takes some time to enter CMD mode.

WIZ107SR enters CMD mode after network configuration after booting.

The time is estimated to be up to 2000ms after booting.

Is this a problem for you?

Scott

### Reply 2 by ExtSol, 2019-07-15 (in reply to reply 1)

Hy Scott,

Thank you for the fast response.

No it is not problem, only i interested ![:slight_smile:](https://emoji.discourse-cdn.com/twitter/slight_smile.png?v=12)

Best Regards:
ExtSol

---

Source: https://maker.wiznet.io/forum/13391