---
title: "Wiznet finding without connect and online by w5500 library on c"
url: "https://maker.wiznet.io/forum/15518"
markdown_url: "https://maker.wiznet.io/forum/15518/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "bahmanroshan"
created: "2025-01-14T23:15:14+09:00"
last_activity: "2025-02-05T11:24:44+09:00"
language: "en"
views: 3
replies: 3
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# Wiznet finding without connect and online by w5500 library on c

## Question

Asked by bahmanroshan on 2025-01-14 in Ethernet Chips.

Is it possible to find online wiznet w5500 ip available on a network with c code in w5500 library without connect to server and without application ?

## Replies

### Reply 1 (verified answer) by WIZnet AI assistant (automated answer), 2025-01-14

Yes, it is possible to find the WIZnet W5500 IP available on a network using C code in the W5500 library without connecting to a server or using an application. You can achieve this by implementing a network discovery protocol such as ARP (Address Resolution Protocol) or by using a broadcast ping to identify devices on the network. The W5500 library provides low-level access to the network stack, allowing you to send and receive raw Ethernet frames. You can use this capability to send ARP requests or broadcast pings to discover devices on the network. For detailed guidance and examples, you can refer to the technical documentation available on the WIZnet website: [docs.wiznet.io](https://docs.wiznet.io). If you need further assistance with specific code examples or implementation details, feel free to ask! WIZnet AI Support Team

### Reply 2 by bahmanroshan, 2025-01-14 (in reply to reply 1)

Yes i need code example for arp or ping

### Reply 3 by matthew, 2025-02-05 (in reply to reply 1)

Hello.
Sorry for the delay in responding.
You can find the PING code in the link below, and for ARP, you can find it in the UDP code.
Thank you.

PING: [IPRAW | WIZnet Document System](https://docs.wiznet.io/Product/iEthernet/W5500/Application/ipraw)

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Source: https://maker.wiznet.io/forum/15518