---
title: "WIZ550io Using LabView"
url: "https://maker.wiznet.io/forum/10736"
markdown_url: "https://maker.wiznet.io/forum/10736/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "Franci"
created: "2014-12-20T20:35:47+09:00"
last_activity: "2017-05-04T08:34:34+09:00"
language: "en"
views: 733
replies: 2
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# WIZ550io Using LabView

## Question

Asked by Franci on 2014-12-20 in Ethernet Chips.

Hello!

My WIZ550io respond to ping normally. Using LabView TCP read function fails. IP address is set to 192.168.1.2 and port to 10002.
I would like to communicate through SPI with LMP90100 (National Semiconductor) sensor interface chip. It is possible to do this with WIZ550io?

## Replies

### Reply 1 by hjjeon0608, 2014-12-23

Hi,

Yes, you can. Read sensor data and then send the data to WIZ550io.

### Reply 2 by Coccoliso, 2014-12-24

Hello Franci,
you must make sure to work with SPI in Variable Length Date Mode (VDM) and act with 2 separate CS to select the SPI device and communicate through a bit banging protocol.
The Wiz550io can also work in FDM (fixed length data mode), but that will not work with other SPI devices because it does not release the MISO ( see 2.3 W5500 datasheet section ).

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Source: https://maker.wiznet.io/forum/10736