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<?xml-stylesheet type="text/xsl" href="https://devzone.nordicsemi.com/cfs-file/__key/system/syndication/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>UDP Reception Issue in Ethernet Controller Emulation</title><link>https://devzone.nordicsemi.com/f/nordic-q-a/119402/udp-reception-issue-in-ethernet-controller-emulation</link><description>Problem Description 
 I&amp;#39;ve implemented a W5500 Ethernet controller emulation for NRF7002 modules. While UDP socket sending works correctly, receiving UDP packets is problematic. Specifically: 
 
 UDP echo servers work perfectly (send and receive from</description><dc:language>en-US</dc:language><generator>Telligent Community 13</generator><lastBuildDate>Fri, 28 Feb 2025 22:45:49 GMT</lastBuildDate><atom:link rel="self" type="application/rss+xml" href="https://devzone.nordicsemi.com/f/nordic-q-a/119402/udp-reception-issue-in-ethernet-controller-emulation" /><item><title>RE: UDP Reception Issue in Ethernet Controller Emulation</title><link>https://devzone.nordicsemi.com/thread/525367?ContentTypeID=1</link><pubDate>Fri, 28 Feb 2025 22:45:49 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:37aa4a8e-f399-49f1-8462-f00dd4232928</guid><dc:creator>drfhaust</dc:creator><description>&lt;p&gt;I&amp;nbsp;am dealing with a separate issue using the raw tx packet mode i would create a new question for that&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: UDP Reception Issue in Ethernet Controller Emulation</title><link>https://devzone.nordicsemi.com/thread/525366?ContentTypeID=1</link><pubDate>Fri, 28 Feb 2025 22:44:25 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:63e29dec-efb1-425f-a488-70969c89d1db</guid><dc:creator>drfhaust</dc:creator><description>&lt;p&gt;hi i actually fixed the issue it was happening because i used sock connect for udp&lt;br /&gt;once i skipped that step it worked correctly&lt;br /&gt;&lt;br /&gt;&lt;br /&gt;&lt;br /&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: UDP Reception Issue in Ethernet Controller Emulation</title><link>https://devzone.nordicsemi.com/thread/525280?ContentTypeID=1</link><pubDate>Fri, 28 Feb 2025 13:22:04 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:15d44648-1e9d-4d86-88bf-c819b6de780b</guid><dc:creator>Marte Myrvold</dc:creator><description>&lt;p&gt;Hi,&lt;/p&gt;
&lt;p&gt;To clarify, do you see the issue only with UDP servers using ephemeral ports, or do you see it with other UDP servers as well? Can the server be forced to use a fixed, non-ephemeral port?&lt;/p&gt;
&lt;p&gt;It could be that the poll is not triggered because the UDP message is sent from an ephemeral port rather than the port the device is bound to and polling on.&lt;/p&gt;
&lt;p&gt;Please share device logs and the Wireshark capture.&lt;/p&gt;
&lt;p&gt;Best regards,&lt;br /&gt;Marte&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>