---
title: "Connection of unused pins"
url: "https://maker.wiznet.io/forum/10091"
markdown_url: "https://maker.wiznet.io/forum/10091/md"
type: "Forum topic"
category: "Wireless"
author: "MauB"
created: "2014-03-25T18:56:57+09:00"
last_activity: "2017-05-04T08:32:10+09:00"
language: "en"
views: 437
replies: 1
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# Connection of unused pins

## Question

Asked by MauB on 2014-03-25 in Wireless.

Hello,

I have been using the WizFi210 module connected with only the power pins (9,32,33,34), ground pins, UART0 pins, GPIO29 and GPIO27 for F/W update.

Is it advisable to connect any other unused pins with either pull-up or pull-down resistors (depending on every specific case) or I can just leave all unused pins unconnected (floating) ?

Thank you for any clarification !

## Replies

### Reply 1 by kaizen, 2014-03-26

Hi

It is no problem to connect only the power pins, ground pins, UART0 pins, GPIO29 and GPIO27.
But we recommend to use as reference Schematic.

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Source: https://maker.wiznet.io/forum/10091