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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>Buttonless DFU example : Can&amp;#39;t put device to boot mode</title><link>https://devzone.nordicsemi.com/f/nordic-q-a/18779/buttonless-dfu-example-can-t-put-device-to-boot-mode</link><description>Hello Experts, 
 I am running the following examples to test the DFU bootloader in gcc and eclipse environment. 
 bootloader_secure/pca10040(Bootloader) and experimental_ble_app_buttonless_dfu(DFU template). My device is nrf52 and I am using nRF5_SDK_12</description><dc:language>en-US</dc:language><generator>Telligent Community 13</generator><lastBuildDate>Thu, 05 Jan 2017 09:42:32 GMT</lastBuildDate><atom:link rel="self" type="application/rss+xml" href="https://devzone.nordicsemi.com/f/nordic-q-a/18779/buttonless-dfu-example-can-t-put-device-to-boot-mode" /><item><title>RE: Buttonless DFU example : Can't put device to boot mode</title><link>https://devzone.nordicsemi.com/thread/72542?ContentTypeID=1</link><pubDate>Thu, 05 Jan 2017 09:42:32 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:89afdd36-8c95-45e3-886c-4a7c19dc25e1</guid><dc:creator>bjorn-spockeli</dc:creator><description>&lt;p&gt;Happy to hear that you&amp;#39;re able to enter bootloader mode using the buttonless example. The known issues with the buttonless example is listed &lt;a href="https://devzone.nordicsemi.com/question/93241/what-are-sdk-12x0-known-issues/"&gt;here&lt;/a&gt;.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Buttonless DFU example : Can't put device to boot mode</title><link>https://devzone.nordicsemi.com/thread/72541?ContentTypeID=1</link><pubDate>Wed, 04 Jan 2017 23:49:49 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:70ee203e-aba9-44e6-b988-132ffc4d889a</guid><dc:creator>himanshu pande</dc:creator><description>&lt;p&gt;I am able to enter the bootloader mode now. I had not enabled the notifications for the service.&lt;/p&gt;
&lt;p&gt;Just to sum up the steps:&lt;/p&gt;
&lt;ol&gt;
&lt;li&gt;Compile Secure Bootloader example.&lt;/li&gt;
&lt;li&gt;Flash the softdevice&lt;/li&gt;
&lt;li&gt;Flash the bootloader.&lt;/li&gt;
&lt;li&gt;Compile the DFU Template application and transfer it to device using zip file.(I used android device) =&amp;gt; Make sure to add&lt;/li&gt;
&lt;/ol&gt;
&lt;blockquote&gt;
&lt;p&gt;char_md.char_props.write  = 1;&lt;/p&gt;
&lt;/blockquote&gt;
&lt;p&gt;to your ble_dfu.c in the function rx_char_add()&lt;/p&gt;
&lt;ol start="5"&gt;
&lt;li&gt;Now, connect to the device &amp;quot;Nordic_Template&amp;quot; in nrf connect.&lt;/li&gt;
&lt;li&gt;Enable characteristics and send the value 1 to control.&lt;/li&gt;
&lt;/ol&gt;
&lt;p&gt;Voila, device enters bootloader mode without any button press. :)&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>