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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>UART Async API Issue When Integrating with Matter on nRF54L15</title><link>https://devzone.nordicsemi.com/f/nordic-q-a/122503/uart-async-api-issue-when-integrating-with-matter-on-nrf54l15</link><description>Hello Nordic Team, 
 I am currently working with the nRF54L15 DK and interfacing an occupancy sensor over UART. In my standalone application (non-Matter), the UART communication works correctly in asynchronous mode, and I&amp;#39;m able to receive sensor data</description><dc:language>en-US</dc:language><generator>Telligent Community 13</generator><lastBuildDate>Thu, 26 Jun 2025 13:57:48 GMT</lastBuildDate><atom:link rel="self" type="application/rss+xml" href="https://devzone.nordicsemi.com/f/nordic-q-a/122503/uart-async-api-issue-when-integrating-with-matter-on-nrf54l15" /><item><title>RE: UART Async API Issue When Integrating with Matter on nRF54L15</title><link>https://devzone.nordicsemi.com/thread/540598?ContentTypeID=1</link><pubDate>Thu, 26 Jun 2025 13:57:48 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:8734f44b-e5d9-491c-95e2-4e8972e3ef2d</guid><dc:creator>Maria Gilje</dc:creator><description>&lt;p&gt;Hi&amp;nbsp; Rahul Chauhan,&amp;nbsp;&lt;/p&gt;
&lt;p&gt;You can specify one instance to be interrupt driven while the other is asynchronous. By default the console UART is interrupt driven, so it is expected that this does not work when configuring it as asynchronous.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;If you have configured the console UART to uart20, please modify these three Kconfigs to the following:&amp;nbsp;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;pre class="ui-code" data-mode="text"&gt;CONFIG_UART_20_ASYNC=n
CONFIG_UART_20_NRF_ASYNC_LOW_POWER=n # or remove
CONFIG_UART_20_INTERRUPT_DRIVEN=y&lt;/pre&gt;&lt;/p&gt;
&lt;p&gt;Best regards,&lt;/p&gt;
&lt;p&gt;Maria&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>