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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 MESH PROBLEM</title><link>https://devzone.nordicsemi.com/f/nordic-q-a/45908/uart-mesh-problem</link><description>Hi, 
 Here i are using nRF52832 ,softdevice S132 and mesh sdk v3.0.0 
 I am facing an issue in UART configuration in mesh (LIGHT SWITCH EXAMPLE) server code . When using my customized configured pins 14(RX) and 13(TX), if i use external pull up resistor</description><dc:language>en-US</dc:language><generator>Telligent Community 13</generator><lastBuildDate>Tue, 23 Jul 2019 12:25:22 GMT</lastBuildDate><atom:link rel="self" type="application/rss+xml" href="https://devzone.nordicsemi.com/f/nordic-q-a/45908/uart-mesh-problem" /><item><title>RE: UART MESH PROBLEM</title><link>https://devzone.nordicsemi.com/thread/200055?ContentTypeID=1</link><pubDate>Tue, 23 Jul 2019 12:25:22 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:31fa0dc9-2813-41ee-a7fd-b08d6c63adb2</guid><dc:creator>Kamo</dc:creator><description>&lt;p&gt;Hi.&lt;/p&gt;
&lt;p&gt;From the HW view. -&amp;gt; !!!!!!!!!!!!!! ********** &lt;strong&gt;Allways treat unConnected RX_line by Pull_Up resistor&lt;/strong&gt; **********!!!!!!!!!&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;Kamo.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: UART MESH PROBLEM</title><link>https://devzone.nordicsemi.com/thread/181037?ContentTypeID=1</link><pubDate>Tue, 09 Apr 2019 12:08:05 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:c0dbc332-fd9f-4e2c-a044-acf4a122e22c</guid><dc:creator>Edvin</dc:creator><description>&lt;p&gt;Hello,&lt;/p&gt;
&lt;p&gt;When you say:&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
[quote user=""]When using my customized configured pins 14(RX) and 13(TX), if i use external pull up resistor(10k) on RX line then code is working fine , but if i use any standard BLE example code(other than mesh) without external pull up resistor on same board it&amp;#39;s working.[/quote]
&lt;p&gt;&amp;nbsp;In what case is it working, and in what case is it not working?&lt;/p&gt;
&lt;p&gt;And also, if you mean if that it is not working in one of the cases, what do you mean by this? How is it &amp;quot;not working&amp;quot;? My guess is that you have an APP_ERROR_CHECK(err_code) or ERROR_CHECK(err_code) or the COMMUNICATION_ERROR event in the UART event handler. This is a typical error if you initialize a UART RX pin with floating pins (without pullup). Is that the case, maybe?&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;If you define DEBUG in your preprocessor defines (let me know if you don&amp;#39;t know how to do this, and let me know what compiler you are using). Then it should say in the log why/where your application fails.&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;Best regards,&lt;br /&gt;Edvin&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>