---
title: "AT+NSUDP command"
url: "https://maker.wiznet.io/forum/10897"
markdown_url: "https://maker.wiznet.io/forum/10897/md"
type: "Forum topic"
category: "Wireless"
author: "wifitech"
created: "2015-03-11T15:36:21+09:00"
last_activity: "2017-05-04T08:35:01+09:00"
language: "en"
views: 497
replies: 1
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# AT+NSUDP command

## Question

Asked by wifitech on 2015-03-11 in Wireless.

Hi,

I am just reading the reference manual of WizFi210/220. The command AT+NSUDP is confusing me. What is the purpose of this command ? Is it to listen at the specified port for an incomming UDP telegram or may I use it for sending a broadcast?
If it’s for ‘listen’: is there a command for sending an UDP broadcast / multicast?

Thank you!

Kind regards,

wifitech

## Replies

### Reply 1 by ssekim, 2015-03-12

As you know, UDP doesn’t have listen-feature.

WizFi210 (as UDP Server) would send the data to the client which send the data to WizFi210.
This is for the case WizFi210 have no idea about client-ip-address.

And, to send broadcast-packet, you have only to use broadcast(multicast)-ip-address.
(ex:192.168.0.255)

---

Source: https://maker.wiznet.io/forum/10897