---
title: "[From QnA] WIZ108SR HW rev1.1 and FW v2.20 HW_TRIG Bug?"
url: "https://maker.wiznet.io/forum/9503"
markdown_url: "https://maker.wiznet.io/forum/9503/md"
type: "Forum topic"
category: "Serial-to-Ethernet & ConfigTool"
author: "jameskim"
created: "2013-09-09T00:32:41+09:00"
last_activity: "2017-05-04T08:29:54+09:00"
language: "en"
views: 484
replies: 3
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# [From QnA] WIZ108SR HW rev1.1 and FW v2.20 HW_TRIG Bug?

## Question

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

I am testing the Wiz108sr hardware version 1.1 with firmware version 2.20.

The wiz108sr is configured as a TCP client connecting to a server with a static address. The wiz108sr is also configured with a static address.

Once a connection is established, HW_TRIG goes low indicating there is a connection. Once a connection is established, the wiz108sr functions fine. However, if the connection is broken, ( for example the Ethernet cable is disconnected) then HW_TRIG stays low, falsely indicating the connection is established. HW_TRIG seems to stay low until the wiz108sr is rebooted.
My understanding is that HW_TRIG should go high once the connection is broken (closed) and this does not happen.

## Replies

### Reply 1 by jameskim, 2013-09-09

Dear customer,

Currently, Do you use wiz108sr EVB?
If yes, Try to test again without Wiz108sr EVB.
Because if you use wiz108sr EVB, H/W trig pin will operate by switch of EVB.
And when power off, the default value H/W trig is high.
Thanks,
WIZnet

### Reply 2 by jameskim, 2013-09-09

Thank you for your reply.
I started with EVB, but now I am using it directly and looking at the output of the HW_TRIG pin directly. Once connection is established the HW_TRIG goes low. However, if you unplug the eithernet cable which should close the connection, the HW_TRIG stays low it does not recognize the loss of connection.

### Reply 3 by jameskim, 2013-09-09

Dear customer,

When wiz108sr started with EVB, HW_TRIG pin value is setting up by switch value of EVB.
Therefore you should use without EVB(Serial included) for correct measure of HW_TRIG pin value.
thanks,
WIznet

---

Source: https://maker.wiznet.io/forum/9503