https://devzone.nordicsemi.com/f/nordic-q-a/20963/app-to-app-dfuHELLO, I want using sdk5.2.0/s110 6.0.0 update app in app.I only find BootLoader-&gt;app.How can I achieve it. eg:I use my phone connect 51822 board,then send a command to board,board receive the command go to dfu mode.en-USTelligent Community 13Fri, 31 Mar 2017 03:03:07 GMThttps://devzone.nordicsemi.com/thread/81909?ContentTypeID=1Fri, 31 Mar 2017 03:03:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8ac51ea7-1ddb-4796-94c4-b438543aba91king001<p>nice, buttonless is I want to try.thx!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/81910?ContentTypeID=1Thu, 30 Mar 2017 14:21:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:72f3b627-c811-43d9-8ede-5863d66da442Hung Bui<p>@King001: What do you want exactly? Please describe with more detail. What is &quot;update app in app&quot; ?</p> <p>Are you talking about buttonless bootloader ? Like <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v13.0.0/ble_sdk_app_buttonless_dfu.html?cp=4_0_0_4_1_2_23">this one</a>?</p> <p>Note that SDK v5.2.0 is a very old SDK, the current one is SDk v13.</p><div style="clear:both;"></div>