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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>SLM application and UART</title><link>https://devzone.nordicsemi.com/f/nordic-q-a/65866/slm-application-and-uart</link><description>Hi 
 Does the SLM application turn off the UART? I need the UART to be turned off whenever its not in use due to power consumption. 
 Still, the modem should be on to support PSM operations. 
 Is this already supported in the SLM application?</description><dc:language>en-US</dc:language><generator>Telligent Community 13</generator><lastBuildDate>Wed, 16 Sep 2020 09:10:22 GMT</lastBuildDate><atom:link rel="self" type="application/rss+xml" href="https://devzone.nordicsemi.com/f/nordic-q-a/65866/slm-application-and-uart" /><item><title>RE: SLM application and UART</title><link>https://devzone.nordicsemi.com/thread/269796?ContentTypeID=1</link><pubDate>Wed, 16 Sep 2020 09:10:22 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:dd136e79-4268-41d7-88d5-540e2bd492e8</guid><dc:creator>&amp;#216;yvind</dc:creator><description>&lt;p&gt;Hi,&amp;nbsp;&lt;br /&gt;&lt;br /&gt;Yes, that is correct.&amp;nbsp;&lt;br /&gt;&lt;br /&gt;-Øyvind&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: SLM application and UART</title><link>https://devzone.nordicsemi.com/thread/269787?ContentTypeID=1</link><pubDate>Wed, 16 Sep 2020 08:41:22 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:4f363e18-aa9a-4c19-b361-fbb6dbcec6f7</guid><dc:creator>Bard</dc:creator><description>&lt;p&gt;Hi&lt;/p&gt;
&lt;p&gt;Just to be sure.. putting the application in&amp;nbsp;&lt;span&gt;SHUTDOWN_MODE_IDLE; The modem will still be in PSM mode and any unsolicited response from the modem will NOT be a problem even though the AT host is uninitialized?&lt;/span&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: SLM application and UART</title><link>https://devzone.nordicsemi.com/thread/269546?ContentTypeID=1</link><pubDate>Tue, 15 Sep 2020 07:52:21 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:1e7141fa-0a4b-4fa9-bc38-c358184663ee</guid><dc:creator>&amp;#216;yvind</dc:creator><description>&lt;p&gt;Hello,&amp;nbsp;&lt;br /&gt;&lt;br /&gt;AT#XSLEEP command is intended for this use. Issuing either&amp;nbsp;AT#XSLEEP=0 or AT#SLEEP, this will turn off UART and put APP core to IDLE. AT#XSLEEP=1 will put the device into deep sleep, turning off the modem.&lt;br /&gt;&lt;br /&gt;Have a look at the &lt;a href="https://github.com/nrfconnect/sdk-nrf/blob/f61036cce89a74c014a473a4d2e2cc6b2d5d8c47/applications/serial_lte_modem/src/main.c#L66-L93"&gt;enter_idle function&lt;/a&gt;&amp;nbsp;and the &lt;a href="https://github.com/nrfconnect/sdk-nrf/blob/f61036cce89a74c014a473a4d2e2cc6b2d5d8c47/applications/serial_lte_modem/src/main.c#L95-L120"&gt;enter_sleep function&lt;/a&gt;&amp;nbsp;in the SLM application. These are handled in the sleep handler:&amp;nbsp;&lt;a href="https://github.com/nrfconnect/sdk-nrf/blob/f61036cce89a74c014a473a4d2e2cc6b2d5d8c47/applications/serial_lte_modem/src/slm_at_host.c#L145-L193"&gt;handle_at_sleep&lt;/a&gt;.&lt;br /&gt;&lt;br /&gt;Kind regards,&lt;br /&gt;Øyvind&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: SLM application and UART</title><link>https://devzone.nordicsemi.com/thread/269385?ContentTypeID=1</link><pubDate>Mon, 14 Sep 2020 13:09:15 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:2fe49a85-793f-48e8-b8d0-ab1e47b5b5e3</guid><dc:creator>&amp;#216;yvind</dc:creator><description>&lt;p&gt;Hello,&amp;nbsp;&lt;br /&gt;&lt;br /&gt;I will need to forward this question to our SLM developer, and will get back to you within tomorrow.&lt;br /&gt;&lt;br /&gt;Kind regards,&lt;br /&gt;Øyvind&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>